def patch(resource, **lookup):
""" Perform a document patch/update. Updates are first validated against
the resource schema. If validation passes, the document is updated and
an OK status update is returned. If validation fails, a set of validation
issues is returned.
:param resource: the name of the resource to which the document belongs.
:param **lookup: document lookup query.
.. versionchanged:: 0.5
ETAG is now stored with the document (#369).
Catching all HTTPExceptions and returning them to the caller, allowing
for eventual flask.abort() invocations in callback functions to go
through. Fixes #395.
.. versionchanged:: 0.4
Allow abort() to be inoked by callback functions.
'on_update' raised before performing the update on the database.
Support for document versioning.
'on_updated' raised after performing the update on the database.
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise 'on_pre_<method>' event.
.. versionchanged:: 0.1.1
Item-identifier wrapper stripped from both request and response payload.
.. versionchanged:: 0.1.0
Support for optional HATEOAS.
Re-raises `exceptions.Unauthorized`, this could occur if the
`auth_field` condition fails
.. versionchanged:: 0.0.9
More informative error messages.
Support for Python 3.3.
.. versionchanged:: 0.0.8
Let ``werkzeug.exceptions.InternalServerError`` go through as they have
probably been explicitly raised by the data driver.
.. versionchanged:: 0.0.7
Support for Rate-Limiting.
.. versionchanged:: 0.0.6
ETag is now computed without the need of an additional db lookup
.. versionchanged:: 0.0.5
Support for 'aplication/json' Content-Type.
.. versionchanged:: 0.0.4
Added the ``requires_auth`` decorator.
.. versionchanged:: 0.0.3
JSON links. Superflous ``response`` container removed.
"""
payload = payload_()
original = get_document(resource, **lookup)
if not original:
# not found
abort(404)
resource_def = app.config['DOMAIN'][resource]
schema = resource_def['schema']
validator = app.validator(schema, resource)
object_id = original[config.ID_FIELD]
last_modified = None
etag = None
issues = {}
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
updates = parse(payload, resource)
validation = validator.validate_update(updates, object_id)
if validation:
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
store_media_files(updates, resource, original)
resolve_document_version(updates, resource, 'PATCH', original)
# some datetime precision magic
updates[config.LAST_UPDATED] = \
datetime.utcnow().replace(microsecond=0)
# the mongo driver has a different precision than the python
# datetime. since we don't want to reload the document once it has
# been updated, and we still have to provide an updated etag,
# we're going to update the local version of the 'original'
# document, and we will use it for the etag computation.
updated = original.copy()
# notify callbacks
getattr(app, "on_update")(resource, updates, original)
getattr(app, "on_update_%s" % resource)(updates, original)
updated.update(updates)
resolve_document_etag(updated)
app.data.update(resource, object_id, updates)
insert_versioning_documents(resource, updated)
# nofity callbacks
getattr(app, "on_updated")(resource, updates, original)
getattr(app, "on_updated_%s" % resource)(updates, original)
# build the full response document
build_response_document(
updated, resource, embedded_fields, updated)
response = updated
else:
issues = validator.errors
except ValidationError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues['validator exception'] = str(e)
except exceptions.HTTPException as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
abort(400, description=debug_error_message(
'An exception occurred: %s' % e
))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
status = config.VALIDATION_ERROR_STATUS
else:
response[config.STATUS] = config.STATUS_OK
status = 200
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, status
def deleteitem_internal(resource,
concurrency_check=False,
suppress_callbacks=False,
original=None,
**lookup):
""" Intended for internal delete calls, this method is not rate limited,
authentication is not checked, pre-request events are not raised, and
concurrency checking is optional. Deletes a resource item.
:param resource: name of the resource to which the item(s) belong.
:param concurrency_check: concurrency check switch (bool)
:param original: original document if already fetched from the database
:param **lookup: item lookup query.
.. versionchanged:: 0.6
Support for soft delete.
.. versionchanged:: 0.5
Return 204 NoContent instead of 200.
Push updates to OpLog.
Original deleteitem() has been split into deleteitem() and
deleteitem_internal().
.. versionchanged:: 0.4
Fix #284: If you have a media field, and set datasource projection to
0 for that field, the media will not be deleted.
Support for document versioning.
'on_delete_item' events raised before performing the delete.
'on_deleted_item' events raised after performing the delete.
.. versionchanged:: 0.3
Delete media files as needed.
Pass the explicit query filter to the data driver, as it does not
support the id argument anymore.
.. versionchanged:: 0.2
Raise pre_<method> event.
.. versionchanged:: 0.0.7
Support for Rate-Limiting.
.. versionchanged:: 0.0.5
Pass current resource to ``parse_request``, allowing for proper
processing of new configuration settings: `filters`, `sorting`, `paging`.
.. versionchanged:: 0.0.4
Added the ``requires_auth`` decorator.
"""
resource_def = config.DOMAIN[resource]
soft_delete_enabled = resource_def["soft_delete"]
original = get_document(resource,
concurrency_check,
original,
force_auth_field_projection=soft_delete_enabled,
**lookup)
if not original or (soft_delete_enabled
and original.get(config.DELETED) is True):
return all_done()
# notify callbacks
if not suppress_callbacks:
getattr(app, "on_delete_item")(resource, original)
getattr(app, "on_delete_item_%s" % resource)(original)
if soft_delete_enabled:
# Instead of removing the document from the db, just mark it as deleted
marked_document = copy.deepcopy(original)
# Set DELETED flag and update metadata
last_modified = datetime.utcnow().replace(microsecond=0)
marked_document[config.DELETED] = True
marked_document[config.LAST_UPDATED] = last_modified
if config.IF_MATCH:
resolve_document_etag(marked_document, resource)
resolve_document_version(marked_document, resource, "DELETE", original)
# Update document in database (including version collection if needed)
id = original[resource_def["id_field"]]
try:
app.data.replace(resource, id, marked_document, original)
except app.data.OriginalChangedError:
if concurrency_check:
abort(412, description="Client and server etags don't match")
# create previous version if it wasn't already there
late_versioning_catch(original, resource)
# and add deleted version
insert_versioning_documents(resource, marked_document)
# update oplog if needed
oplog_push(resource, marked_document, "DELETE", id)
else:
# Delete the document for real
# media cleanup
media_fields = app.config["DOMAIN"][resource]["_media"]
# document might miss one or more media fields because of datasource
# and/or client projection.
missing_media_fields = [f for f in media_fields if f not in original]
if missing_media_fields:
# retrieve the whole document so we have all media fields available
# Should be very a rare occurrence. We can't get rid of the
# get_document() call since it also deals with etag matching, which
# is still needed. Also, this lookup should never fail.
# TODO not happy with this hack. Not at all. Is there a better way?
original = app.data.find_one_raw(resource, **lookup)
for field in media_fields:
if field in original:
media_field = original[field]
if isinstance(media_field, list):
for file_id in media_field:
app.media.delete(file_id, resource)
else:
app.media.delete(original[field], resource)
id = original[resource_def["id_field"]]
app.data.remove(resource, lookup)
# TODO: should attempt to delete version collection even if setting is
# off
if app.config["DOMAIN"][resource]["versioning"] is True:
app.data.remove(
resource + config.VERSIONS,
{
versioned_id_field(resource_def):
original[resource_def["id_field"]]
},
)
# update oplog if needed
oplog_push(resource, original, "DELETE", id)
if not suppress_callbacks:
getattr(app, "on_deleted_item")(resource, original)
getattr(app, "on_deleted_item_%s" % resource)(original)
return all_done()
def put(resource, **lookup):
""" Perform a document replacement. Updates are first validated against
the resource schema. If validation passes, the document is repalced and
an OK status update is returned. If validation fails a set of validation
issues is returned.
:param resource: the name of the resource to which the document belongs.
:param **lookup: document lookup query.
.. versionchanged:: 0.4
Allow abort() to be inoked by callback functions.
Resolve default values before validation is performed. See #353.
Raise 'on_replace' instead of 'on_insert'. The callback function gets
the document (as opposed to a list of just 1 document) as an argument.
Support for document versioning.
Raise `on_replaced` after the document has been replaced
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise pre_<method> event.
explictly resolve default values instead of letting them be resolved
by common.parse. This avoids a validation error when a read-only field
also has a default value.
.. versionchanged:: 0.1.1
auth.request_auth_value is now used to store the auth_field value.
Item-identifier wrapper stripped from both request and response payload.
.. versionadded:: 0.1.0
"""
resource_def = app.config['DOMAIN'][resource]
schema = resource_def['schema']
validator = app.validator(schema, resource)
payload = payload_()
original = get_document(resource, **lookup)
if not original:
# not found
abort(404)
last_modified = None
etag = None
issues = {}
object_id = original[config.ID_FIELD]
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
document = parse(payload, resource)
resolve_default_values(document, resource_def['defaults'])
validation = validator.validate_replace(document, object_id)
if validation:
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
# update meta
last_modified = datetime.utcnow().replace(microsecond=0)
document[config.LAST_UPDATED] = last_modified
document[config.DATE_CREATED] = original[config.DATE_CREATED]
# ID_FIELD not in document means it is not being automatically
# handled (it has been set to a field which exists in the resource
# schema.
if config.ID_FIELD not in document:
document[config.ID_FIELD] = object_id
resolve_user_restricted_access(document, resource)
store_media_files(document, resource, original)
resolve_document_version(document, resource, 'PUT', original)
# notify callbacks
getattr(app, "on_replace")(resource, document, original)
getattr(app, "on_replace_%s" % resource)(document, original)
# write to db
app.data.replace(resource, object_id, document)
insert_versioning_documents(resource, document)
# notify callbacks
getattr(app, "on_replaced")(resource, document, original)
getattr(app, "on_replaced_%s" % resource)(document, original)
# build the full response document
build_response_document(
document, resource, embedded_fields, document)
response = document
else:
issues = validator.errors
except ValidationError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues['validator exception'] = str(e)
except (exceptions.InternalServerError, exceptions.Unauthorized,
exceptions.Forbidden, exceptions.NotFound) as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
abort(400, description=debug_error_message(
'An exception occurred: %s' % e
))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
else:
response[config.STATUS] = config.STATUS_OK
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, 200
def patch_internal(resource,
payload=None,
concurrency_check=False,
skip_validation=False,
mongo_options=None,
**lookup):
"""Intended for internal patch calls, this method is not rate limited,
authentication is not checked, pre-request events are not raised, and
concurrency checking is optional. Performs a document patch/update.
Updates are first validated against the resource schema. If validation
passes, the document is updated and an OK status update is returned.
If validation fails, a set of validation issues is returned.
:param resource: the name of the resource to which the document belongs.
:param payload: alternative payload. When calling patch() from your own
code you can provide an alternative payload. This can be
useful, for example, when you have a callback function
hooked to a certain endpoint, and want to perform
additional patch() callsfrom there.
Please be advised that in order to successfully use this
option, a request context must be available.
:param concurrency_check: concurrency check switch (bool)
:param skip_validation: skip payload validation before write (bool)
:param mongo_options: options to pass to PyMongo. e.g. ReadConcern of the initial get.
:param **lookup: document lookup query.
.. versionchanged:: 0.6.2
Fix: validator is not set when skip_validation is true.
.. versionchanged:: 0.6
on_updated returns the updated document (#682).
Allow restoring soft deleted documents via PATCH
.. versionchanged:: 0.5
Updating nested document fields does not overwrite the nested document
itself (#519).
Push updates to the OpLog.
Original patch() has been split into patch() and patch_internal().
You can now pass a pre-defined custom payload to the funcion.
ETAG is now stored with the document (#369).
Catching all HTTPExceptions and returning them to the caller, allowing
for eventual flask.abort() invocations in callback functions to go
through. Fixes #395.
.. versionchanged:: 0.4
Allow abort() to be invoked by callback functions.
'on_update' raised before performing the update on the database.
Support for document versioning.
'on_updated' raised after performing the update on the database.
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise 'on_pre_<method>' event.
.. versionchanged:: 0.1.1
Item-identifier wrapper stripped from both request and response payload.
.. versionchanged:: 0.1.0
Support for optional HATEOAS.
Re-raises `exceptions.Unauthorized`, this could occur if the
`auth_field` condition fails
.. versionchanged:: 0.0.9
More informative error messages.
Support for Python 3.3.
.. versionchanged:: 0.0.8
Let ``werkzeug.exceptions.InternalServerError`` go through as they have
probably been explicitly raised by the data driver.
.. versionchanged:: 0.0.7
Support for Rate-Limiting.
.. versionchanged:: 0.0.6
ETag is now computed without the need of an additional db lookup
.. versionchanged:: 0.0.5
Support for 'application/json' Content-Type.
.. versionchanged:: 0.0.4
Added the ``requires_auth`` decorator.
.. versionchanged:: 0.0.3
JSON links. Superflous ``response`` container removed.
"""
if payload is None:
payload = payload_()
original = get_document(resource, concurrency_check, mongo_options,
**lookup)
if not original:
# not found
abort(404)
resource_def = app.config["DOMAIN"][resource]
schema = resource_def["schema"]
normalize_document = resource_def.get("normalize_on_patch")
validator = app.validator(schema,
resource=resource,
allow_unknown=resource_def["allow_unknown"])
object_id = original[resource_def["id_field"]]
last_modified = None
etag = None
issues = {}
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
updates = parse(payload, resource)
if skip_validation:
validation = True
else:
validation = validator.validate_update(updates, object_id,
original,
normalize_document)
updates = validator.document
if validation:
# Apply coerced values
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
store_media_files(updates, resource, original)
resolve_document_version(updates, resource, "PATCH", original)
# some datetime precision magic
updates[config.LAST_UPDATED] = datetime.utcnow().replace(
microsecond=0)
if resource_def["soft_delete"] is True:
# PATCH with soft delete enabled should always set the DELETED
# field to False. We are either carrying through un-deleted
# status, or restoring a soft deleted document
updates[config.DELETED] = False
# the mongo driver has a different precision than the python
# datetime. since we don't want to reload the document once it
# has been updated, and we still have to provide an updated
# etag, we're going to update the local version of the
# 'original' document, and we will use it for the etag
# computation.
updated = deepcopy(original)
# notify callbacks
getattr(app, "on_update")(resource, updates, original)
getattr(app, "on_update_%s" % resource)(updates, original)
if resource_def["merge_nested_documents"]:
updates = resolve_nested_documents(updates, updated)
if mongo_options:
updated.with_options(mongo_options).update(updates)
else:
updated.update(updates)
if config.IF_MATCH:
resolve_document_etag(updated, resource)
# now storing the (updated) ETAG with every document (#453)
updates[config.ETAG] = updated[config.ETAG]
try:
app.data.update(resource, object_id, updates, original)
except app.data.OriginalChangedError:
if concurrency_check:
abort(412,
description="Client and server etags don't match")
# update oplog if needed
oplog_push(resource, updates, "PATCH", object_id)
insert_versioning_documents(resource, updated)
# nofity callbacks
getattr(app, "on_updated")(resource, updates, original)
getattr(app, "on_updated_%s" % resource)(updates, original)
updated.update(updates)
# build the full response document
build_response_document(updated, resource, embedded_fields,
updated)
response = updated
if config.IF_MATCH:
etag = response[config.ETAG]
else:
issues = validator.errors
except DocumentError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues["validator exception"] = str(e)
except exceptions.HTTPException as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
app.logger.exception(e)
abort(400,
description=debug_error_message("An exception occurred: %s" % e))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
status = config.VALIDATION_ERROR_STATUS
else:
response[config.STATUS] = config.STATUS_OK
status = 200
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, status
def put_internal(resource, payload=None, concurrency_check=False,
skip_validation=False, **lookup):
""" Intended for internal put calls, this method is not rate limited,
authentication is not checked, pre-request events are not raised, and
concurrency checking is optional. Performs a document replacement.
Updates are first validated against the resource schema. If validation
passes, the document is repalced and an OK status update is returned.
If validation fails a set of validation issues is returned.
:param resource: the name of the resource to which the document belongs.
:param payload: alternative payload. When calling put() from your own code
you can provide an alternative payload. This can be useful,
for example, when you have a callback function hooked to a
certain endpoint, and want to perform additional put()
callsfrom there.
Please be advised that in order to successfully use this
option, a request context must be available.
:param concurrency_check: concurrency check switch (bool)
:param skip_validation: skip payload validation before write (bool)
:param **lookup: document lookup query.
.. versionchanged:: 0.5
Back to resolving default values after validaton as now the validator
can properly validate dependency even when some have default values. See
#353.
Original put() has been split into put() and put_internal().
You can now pass a pre-defined custom payload to the funcion.
ETAG is now stored with the document (#369).
Catching all HTTPExceptions and returning them to the caller, allowing
for eventual flask.abort() invocations in callback functions to go
through. Fixes #395.
.. versionchanged:: 0.4
Allow abort() to be inoked by callback functions.
Resolve default values before validation is performed. See #353.
Raise 'on_replace' instead of 'on_insert'. The callback function gets
the document (as opposed to a list of just 1 document) as an argument.
Support for document versioning.
Raise `on_replaced` after the document has been replaced
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise pre_<method> event.
explictly resolve default values instead of letting them be resolved
by common.parse. This avoids a validation error when a read-only field
also has a default value.
.. versionchanged:: 0.1.1
auth.request_auth_value is now used to store the auth_field value.
Item-identifier wrapper stripped from both request and response payload.
.. versionadded:: 0.1.0
"""
resource_def = app.config['DOMAIN'][resource]
schema = resource_def['schema']
if not skip_validation:
validator = app.validator(schema, resource)
if payload is None:
payload = payload_()
original = get_document(resource, concurrency_check, **lookup)
if not original:
# not found
abort(404)
last_modified = None
etag = None
issues = {}
object_id = original[config.ID_FIELD]
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
document = parse(payload, resource)
if skip_validation:
validation = True
else:
validation = validator.validate_replace(document, object_id)
if validation:
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
# update meta
last_modified = datetime.utcnow().replace(microsecond=0)
document[config.LAST_UPDATED] = last_modified
document[config.DATE_CREATED] = original[config.DATE_CREATED]
# ID_FIELD not in document means it is not being automatically
# handled (it has been set to a field which exists in the resource
# schema.
if config.ID_FIELD not in document:
document[config.ID_FIELD] = object_id
resolve_user_restricted_access(document, resource)
resolve_default_values(document, resource_def['defaults'])
store_media_files(document, resource, original)
resolve_document_version(document, resource, 'PUT', original)
# notify callbacks
getattr(app, "on_replace")(resource, document, original)
getattr(app, "on_replace_%s" % resource)(document, original)
resolve_document_etag(document)
# write to db
app.data.replace(resource, object_id, document)
# update oplog if needed
oplog_push(resource, document, 'PUT')
insert_versioning_documents(resource, document)
# notify callbacks
getattr(app, "on_replaced")(resource, document, original)
getattr(app, "on_replaced_%s" % resource)(document, original)
# build the full response document
build_response_document(
document, resource, embedded_fields, document)
response = document
else:
issues = validator.errors
except ValidationError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues['validator exception'] = str(e)
except exceptions.HTTPException as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
abort(400, description=debug_error_message(
'An exception occurred: %s' % e
))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
status = config.VALIDATION_ERROR_STATUS
else:
response[config.STATUS] = config.STATUS_OK
status = 200
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, status
def patch_internal(resource, payload=None, concurrency_check=False,
skip_validation=False, **lookup):
""" Intended for internal patch calls, this method is not rate limited,
authentication is not checked, pre-request events are not raised, and
concurrency checking is optional. Performs a document patch/update.
Updates are first validated against the resource schema. If validation
passes, the document is updated and an OK status update is returned.
If validation fails, a set of validation issues is returned.
:param resource: the name of the resource to which the document belongs.
:param payload: alternative payload. When calling patch() from your own
code you can provide an alternative payload. This can be
useful, for example, when you have a callback function
hooked to a certain endpoint, and want to perform
additional patch() callsfrom there.
Please be advised that in order to successfully use this
option, a request context must be available.
:param concurrency_check: concurrency check switch (bool)
:param skip_validation: skip payload validation before write (bool)
:param **lookup: document lookup query.
.. versionchanged:: 0.6.2
Fix: validator is not set when skip_validation is true.
.. versionchanged:: 0.6
on_updated returns the updated document (#682).
Allow restoring soft deleted documents via PATCH
.. versionchanged:: 0.5
Updating nested document fields does not overwrite the nested document
itself (#519).
Push updates to the OpLog.
Original patch() has been split into patch() and patch_internal().
You can now pass a pre-defined custom payload to the funcion.
ETAG is now stored with the document (#369).
Catching all HTTPExceptions and returning them to the caller, allowing
for eventual flask.abort() invocations in callback functions to go
through. Fixes #395.
.. versionchanged:: 0.4
Allow abort() to be inoked by callback functions.
'on_update' raised before performing the update on the database.
Support for document versioning.
'on_updated' raised after performing the update on the database.
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise 'on_pre_<method>' event.
.. versionchanged:: 0.1.1
Item-identifier wrapper stripped from both request and response payload.
.. versionchanged:: 0.1.0
Support for optional HATEOAS.
Re-raises `exceptions.Unauthorized`, this could occur if the
`auth_field` condition fails
.. versionchanged:: 0.0.9
More informative error messages.
Support for Python 3.3.
.. versionchanged:: 0.0.8
Let ``werkzeug.exceptions.InternalServerError`` go through as they have
probably been explicitly raised by the data driver.
.. versionchanged:: 0.0.7
Support for Rate-Limiting.
.. versionchanged:: 0.0.6
ETag is now computed without the need of an additional db lookup
.. versionchanged:: 0.0.5
Support for 'aplication/json' Content-Type.
.. versionchanged:: 0.0.4
Added the ``requires_auth`` decorator.
.. versionchanged:: 0.0.3
JSON links. Superflous ``response`` container removed.
"""
if payload is None:
payload = payload_()
original = get_document(resource, concurrency_check, **lookup)
if not original:
# not found
abort(404)
resource_def = app.config['DOMAIN'][resource]
schema = resource_def['schema']
validator = app.validator(schema, resource)
object_id = original[resource_def['id_field']]
last_modified = None
etag = None
issues = {}
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
updates = parse(payload, resource)
if skip_validation:
validation = True
else:
validation = validator.validate_update(updates, object_id,
original)
updates = validator.document
if validation:
# Apply coerced values
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
store_media_files(updates, resource, original)
resolve_document_version(updates, resource, 'PATCH', original)
# some datetime precision magic
updates[config.LAST_UPDATED] = \
datetime.utcnow().replace(microsecond=0)
if resource_def['soft_delete'] is True:
# PATCH with soft delete enabled should always set the DELETED
# field to False. We are either carrying through un-deleted
# status, or restoring a soft deleted document
updates[config.DELETED] = False
# the mongo driver has a different precision than the python
# datetime. since we don't want to reload the document once it
# has been updated, and we still have to provide an updated
# etag, we're going to update the local version of the
# 'original' document, and we will use it for the etag
# computation.
updated = deepcopy(original)
# notify callbacks
getattr(app, "on_update")(resource, updates, original)
getattr(app, "on_update_%s" % resource)(updates, original)
updates = resolve_nested_documents(updates, updated)
updated.update(updates)
if config.IF_MATCH:
resolve_document_etag(updated, resource)
# now storing the (updated) ETAG with every document (#453)
updates[config.ETAG] = updated[config.ETAG]
try:
app.data.update(
resource, object_id, updates, original)
except app.data.OriginalChangedError:
if concurrency_check:
abort(412,
description='Client and server etags don\'t match')
# update oplog if needed
oplog_push(resource, updates, 'PATCH', object_id)
insert_versioning_documents(resource, updated)
# nofity callbacks
getattr(app, "on_updated")(resource, updates, original)
getattr(app, "on_updated_%s" % resource)(updates, original)
updated.update(updates)
# build the full response document
build_response_document(
updated, resource, embedded_fields, updated)
response = updated
if config.IF_MATCH:
etag = response[config.ETAG]
else:
issues = validator.errors
except ValidationError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues['validator exception'] = str(e)
except exceptions.HTTPException as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
app.logger.exception(e)
abort(400, description=debug_error_message(
'An exception occurred: %s' % e
))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
status = config.VALIDATION_ERROR_STATUS
else:
response[config.STATUS] = config.STATUS_OK
status = 200
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, status
def put_internal(resource,
payload=None,
concurrency_check=False,
skip_validation=False,
**lookup):
""" Intended for internal put calls, this method is not rate limited,
authentication is not checked, pre-request events are not raised, and
concurrency checking is optional. Performs a document replacement.
Updates are first validated against the resource schema. If validation
passes, the document is repalced and an OK status update is returned.
If validation fails a set of validation issues is returned.
:param resource: the name of the resource to which the document belongs.
:param payload: alternative payload. When calling put() from your own code
you can provide an alternative payload. This can be useful,
for example, when you have a callback function hooked to a
certain endpoint, and want to perform additional put()
callsfrom there.
Please be advised that in order to successfully use this
option, a request context must be available.
:param concurrency_check: concurrency check switch (bool)
:param skip_validation: skip payload validation before write (bool)
:param **lookup: document lookup query.
.. versionchanged:: 0.6
Create document if it does not exist. Closes #634.
Allow restoring soft deleted documents via PUT
.. versionchanged:: 0.5
Back to resolving default values after validaton as now the validator
can properly validate dependency even when some have default values. See
#353.
Original put() has been split into put() and put_internal().
You can now pass a pre-defined custom payload to the funcion.
ETAG is now stored with the document (#369).
Catching all HTTPExceptions and returning them to the caller, allowing
for eventual flask.abort() invocations in callback functions to go
through. Fixes #395.
.. versionchanged:: 0.4
Allow abort() to be inoked by callback functions.
Resolve default values before validation is performed. See #353.
Raise 'on_replace' instead of 'on_insert'. The callback function gets
the document (as opposed to a list of just 1 document) as an argument.
Support for document versioning.
Raise `on_replaced` after the document has been replaced
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise pre_<method> event.
explictly resolve default values instead of letting them be resolved
by common.parse. This avoids a validation error when a read-only field
also has a default value.
.. versionchanged:: 0.1.1
auth.request_auth_value is now used to store the auth_field value.
Item-identifier wrapper stripped from both request and response payload.
.. versionadded:: 0.1.0
"""
resource_def = app.config['DOMAIN'][resource]
schema = resource_def['schema']
validator = app.validator(schema, resource)
if payload is None:
payload = payload_()
original = get_document(resource, concurrency_check, **lookup)
if not original:
if config.UPSERT_ON_PUT:
id = lookup[resource_def['id_field']]
# this guard avoids a bson dependency, which would be needed if we
# wanted to use 'isinstance'. Should also be slightly faster.
if schema[resource_def['id_field']].get('type', '') == 'objectid':
id = str(id)
payload[resource_def['id_field']] = id
return post_internal(resource, payl=payload)
else:
abort(404)
last_modified = None
etag = None
issues = {}
object_id = original[resource_def['id_field']]
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
document = parse(payload, resource)
resolve_sub_resource_path(document, resource)
if skip_validation:
validation = True
else:
validation = validator.validate_replace(document, object_id,
original)
# Apply coerced values
document = validator.document
if validation:
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
# update meta
last_modified = datetime.utcnow().replace(microsecond=0)
document[config.LAST_UPDATED] = last_modified
document[config.DATE_CREATED] = original[config.DATE_CREATED]
if resource_def['soft_delete'] is True:
# PUT with soft delete enabled should always set the DELETED
# field to False. We are either carrying through un-deleted
# status, or restoring a soft deleted document
document[config.DELETED] = False
# id_field not in document means it is not being automatically
# handled (it has been set to a field which exists in the
# resource schema.
if resource_def['id_field'] not in document:
document[resource_def['id_field']] = object_id
resolve_user_restricted_access(document, resource)
resolve_default_values(document, resource_def['defaults'])
store_media_files(document, resource, original)
resolve_document_version(document, resource, 'PUT', original)
# notify callbacks
getattr(app, "on_replace")(resource, document, original)
getattr(app, "on_replace_%s" % resource)(document, original)
resolve_document_etag(document, resource)
# write to db
try:
app.data.replace(resource, object_id, document, original)
except app.data.OriginalChangedError:
if concurrency_check:
abort(412,
description='Client and server etags don\'t match')
# update oplog if needed
oplog_push(resource, document, 'PUT')
insert_versioning_documents(resource, document)
# notify callbacks
getattr(app, "on_replaced")(resource, document, original)
getattr(app, "on_replaced_%s" % resource)(document, original)
# build the full response document
build_response_document(document, resource, embedded_fields,
document)
response = document
if config.IF_MATCH:
etag = response[config.ETAG]
else:
issues = validator.errors
except ValidationError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues['validator exception'] = str(e)
except exceptions.HTTPException as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
app.logger.exception(e)
abort(400,
description=debug_error_message('An exception occurred: %s' % e))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
status = config.VALIDATION_ERROR_STATUS
else:
response[config.STATUS] = config.STATUS_OK
status = 200
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, status
def deleteitem_internal(
resource, concurrency_check=False, suppress_callbacks=False, **lookup):
""" Intended for internal delete calls, this method is not rate limited,
authentication is not checked, pre-request events are not raised, and
concurrency checking is optional. Deletes a resource item.
:param resource: name of the resource to which the item(s) belong.
:param concurrency_check: concurrency check switch (bool)
:param **lookup: item lookup query.
.. versionchanged:: 0.6
Support for soft delete.
.. versionchanged:: 0.5
Return 204 NoContent instead of 200.
Push updates to OpLog.
Original deleteitem() has been split into deleteitem() and
deleteitem_internal().
.. versionchanged:: 0.4
Fix #284: If you have a media field, and set datasource projection to
0 for that field, the media will not be deleted.
Support for document versioning.
'on_delete_item' events raised before performing the delete.
'on_deleted_item' events raised after performing the delete.
.. versionchanged:: 0.3
Delete media files as needed.
Pass the explicit query filter to the data driver, as it does not
support the id argument anymore.
.. versionchanged:: 0.2
Raise pre_<method> event.
.. versionchanged:: 0.0.7
Support for Rate-Limiting.
.. versionchanged:: 0.0.5
Pass current resource to ``parse_request``, allowing for proper
processing of new configuration settings: `filters`, `sorting`, `paging`.
.. versionchanged:: 0.0.4
Added the ``requires_auth`` decorator.
"""
resource_def = config.DOMAIN[resource]
soft_delete_enabled = resource_def['soft_delete']
original = get_document(resource, concurrency_check, **lookup)
if not original or (soft_delete_enabled and
original.get(config.DELETED) is True):
abort(404)
# notify callbacks
if suppress_callbacks is not True:
getattr(app, "on_delete_item")(resource, original)
getattr(app, "on_delete_item_%s" % resource)(original)
if soft_delete_enabled:
# Instead of removing the document from the db, just mark it as deleted
marked_document = copy.deepcopy(original)
# Set DELETED flag and update metadata
last_modified = datetime.utcnow().replace(microsecond=0)
marked_document[config.DELETED] = True
marked_document[config.LAST_UPDATED] = last_modified
if config.IF_MATCH:
resolve_document_etag(marked_document, resource)
resolve_document_version(marked_document, resource, 'DELETE', original)
# Update document in database (including version collection if needed)
id = original[resource_def['id_field']]
try:
app.data.replace(resource, id, marked_document, original)
except app.data.OriginalChangedError:
if concurrency_check:
abort(412, description='Client and server etags don\'t match')
# create previous version if it wasn't already there
late_versioning_catch(original, resource)
# and add deleted version
insert_versioning_documents(resource, marked_document)
# update oplog if needed
oplog_push(resource, marked_document, 'DELETE', id)
else:
# Delete the document for real
# media cleanup
media_fields = app.config['DOMAIN'][resource]['_media']
# document might miss one or more media fields because of datasource
# and/or client projection.
missing_media_fields = [f for f in media_fields if f not in original]
if len(missing_media_fields):
# retrieve the whole document so we have all media fields available
# Should be very a rare occurence. We can't get rid of the
# get_document() call since it also deals with etag matching, which
# is still needed. Also, this lookup should never fail.
# TODO not happy with this hack. Not at all. Is there a better way?
original = app.data.find_one_raw(
resource, original[resource_def['id_field']])
for field in media_fields:
if field in original:
app.media.delete(original[field], resource)
id = original[resource_def['id_field']]
app.data.remove(resource, {resource_def['id_field']: id})
# TODO: should attempt to delete version collection even if setting is
# off
if app.config['DOMAIN'][resource]['versioning'] is True:
app.data.remove(
resource + config.VERSIONS,
{versioned_id_field(resource_def):
original[resource_def['id_field']]})
# update oplog if needed
oplog_push(resource, original, 'DELETE', id)
if suppress_callbacks is not True:
getattr(app, "on_deleted_item")(resource, original)
getattr(app, "on_deleted_item_%s" % resource)(original)
return {}, None, None, 204
def put(resource, **lookup):
""" Perform a document replacement. Updates are first validated against
the resource schema. If validation passes, the document is repalced and
an OK status update is returned. If validation fails a set of validation
issues is returned.
:param resource: the name of the resource to which the document belongs.
:param **lookup: document lookup query.
.. versionchanged:: 0.4
Allow abort() to be inoked by callback functions.
Resolve default values before validation is performed. See #353.
Raise 'on_replace' instead of 'on_insert'. The callback function gets
the document (as opposed to a list of just 1 document) as an argument.
Support for document versioning.
Raise `on_replaced` after the document has been replaced
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise pre_<method> event.
explictly resolve default values instead of letting them be resolved
by common.parse. This avoids a validation error when a read-only field
also has a default value.
.. versionchanged:: 0.1.1
auth.request_auth_value is now used to store the auth_field value.
Item-identifier wrapper stripped from both request and response payload.
.. versionadded:: 0.1.0
"""
resource_def = app.config['DOMAIN'][resource]
schema = resource_def['schema']
validator = app.validator(schema, resource)
payload = payload_()
original = get_document(resource, **lookup)
if not original:
# not found
abort(404)
last_modified = None
etag = None
issues = {}
object_id = original[config.ID_FIELD]
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
document = parse(payload, resource)
resolve_default_values(document, resource_def['defaults'])
validation = validator.validate_replace(document, object_id)
if validation:
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
# update meta
last_modified = datetime.utcnow().replace(microsecond=0)
document[config.LAST_UPDATED] = last_modified
document[config.DATE_CREATED] = original[config.DATE_CREATED]
# ID_FIELD not in document means it is not being automatically
# handled (it has been set to a field which exists in the resource
# schema.
if config.ID_FIELD not in document:
document[config.ID_FIELD] = object_id
resolve_user_restricted_access(document, resource)
store_media_files(document, resource, original)
resolve_document_version(document, resource, 'PUT', original)
# notify callbacks
getattr(app, "on_replace")(resource, document, original)
getattr(app, "on_replace_%s" % resource)(document, original)
# write to db
app.data.replace(resource, object_id, document)
insert_versioning_documents(resource, document)
# notify callbacks
getattr(app, "on_replaced")(resource, document, original)
getattr(app, "on_replaced_%s" % resource)(document, original)
# build the full response document
build_response_document(document, resource, embedded_fields,
document)
response = document
else:
issues = validator.errors
except ValidationError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues['validator exception'] = str(e)
except (exceptions.InternalServerError, exceptions.Unauthorized,
exceptions.Forbidden, exceptions.NotFound) as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
abort(400,
description=debug_error_message('An exception occurred: %s' % e))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
else:
response[config.STATUS] = config.STATUS_OK
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, 200
def put_internal(
resource, payload=None, concurrency_check=False, skip_validation=False, **lookup
):
""" Intended for internal put calls, this method is not rate limited,
authentication is not checked, pre-request events are not raised, and
concurrency checking is optional. Performs a document replacement.
Updates are first validated against the resource schema. If validation
passes, the document is replaced and an OK status update is returned.
If validation fails a set of validation issues is returned.
:param resource: the name of the resource to which the document belongs.
:param payload: alternative payload. When calling put() from your own code
you can provide an alternative payload. This can be useful,
for example, when you have a callback function hooked to a
certain endpoint, and want to perform additional put()
callsfrom there.
Please be advised that in order to successfully use this
option, a request context must be available.
:param concurrency_check: concurrency check switch (bool)
:param skip_validation: skip payload validation before write (bool)
:param **lookup: document lookup query.
.. versionchanged:: 0.6
Create document if it does not exist. Closes #634.
Allow restoring soft deleted documents via PUT
.. versionchanged:: 0.5
Back to resolving default values after validation as now the validator
can properly validate dependency even when some have default values. See
#353.
Original put() has been split into put() and put_internal().
You can now pass a pre-defined custom payload to the funcion.
ETAG is now stored with the document (#369).
Catching all HTTPExceptions and returning them to the caller, allowing
for eventual flask.abort() invocations in callback functions to go
through. Fixes #395.
.. versionchanged:: 0.4
Allow abort() to be invoked by callback functions.
Resolve default values before validation is performed. See #353.
Raise 'on_replace' instead of 'on_insert'. The callback function gets
the document (as opposed to a list of just 1 document) as an argument.
Support for document versioning.
Raise `on_replaced` after the document has been replaced
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise pre_<method> event.
explicitly resolve default values instead of letting them be resolved
by common.parse. This avoids a validation error when a read-only field
also has a default value.
.. versionchanged:: 0.1.1
auth.request_auth_value is now used to store the auth_field value.
Item-identifier wrapper stripped from both request and response payload.
.. versionadded:: 0.1.0
"""
resource_def = app.config["DOMAIN"][resource]
schema = resource_def["schema"]
validator = app.validator(
schema, resource=resource, allow_unknown=resource_def["allow_unknown"]
)
if payload is None:
payload = payload_()
# Retrieve the original document without checking user-restricted access,
# but returning the document owner in the projection. This allows us to
# prevent PUT if the document exists, but is owned by a different user
# than the currently authenticated one.
original = get_document(
resource,
concurrency_check,
check_auth_value=False,
force_auth_field_projection=True,
**lookup
)
if not original:
if config.UPSERT_ON_PUT:
id = lookup[resource_def["id_field"]]
# this guard avoids a bson dependency, which would be needed if we
# wanted to use 'isinstance'. Should also be slightly faster.
if schema[resource_def["id_field"]].get("type", "") == "objectid":
id = str(id)
payload[resource_def["id_field"]] = id
return post_internal(resource, payl=payload)
else:
abort(404)
# If the document exists, but is owned by someone else, return
# 403 Forbidden
auth_field, request_auth_value = auth_field_and_value(resource)
if auth_field and original.get(auth_field) != request_auth_value:
abort(403)
last_modified = None
etag = None
issues = {}
object_id = original[resource_def["id_field"]]
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
document = parse(payload, resource)
resolve_sub_resource_path(document, resource)
if skip_validation:
validation = True
else:
validation = validator.validate_replace(document, object_id, original)
# Apply coerced values
document = validator.document
if validation:
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
# update meta
last_modified = datetime.utcnow().replace(microsecond=0)
document[config.LAST_UPDATED] = last_modified
document[config.DATE_CREATED] = original[config.DATE_CREATED]
if resource_def["soft_delete"] is True:
# PUT with soft delete enabled should always set the DELETED
# field to False. We are either carrying through un-deleted
# status, or restoring a soft deleted document
document[config.DELETED] = False
# id_field not in document means it is not being automatically
# handled (it has been set to a field which exists in the
# resource schema.
if resource_def["id_field"] not in document:
document[resource_def["id_field"]] = object_id
resolve_user_restricted_access(document, resource)
store_media_files(document, resource, original)
resolve_document_version(document, resource, "PUT", original)
# notify callbacks
getattr(app, "on_replace")(resource, document, original)
getattr(app, "on_replace_%s" % resource)(document, original)
resolve_document_etag(document, resource)
# write to db
try:
app.data.replace(resource, object_id, document, original)
except app.data.OriginalChangedError:
if concurrency_check:
abort(412, description="Client and server etags don't match")
# update oplog if needed
oplog_push(resource, document, "PUT")
insert_versioning_documents(resource, document)
# notify callbacks
getattr(app, "on_replaced")(resource, document, original)
getattr(app, "on_replaced_%s" % resource)(document, original)
# build the full response document
build_response_document(document, resource, embedded_fields, document)
response = document
if config.IF_MATCH:
etag = response[config.ETAG]
else:
issues = validator.errors
except DocumentError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues["validator exception"] = str(e)
except exceptions.HTTPException as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
app.logger.exception(e)
abort(400, description=debug_error_message("An exception occurred: %s" % e))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
status = config.VALIDATION_ERROR_STATUS
else:
response[config.STATUS] = config.STATUS_OK
status = 200
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, status
def patch(resource, **lookup):
""" Perform a document patch/update. Updates are first validated against
the resource schema. If validation passes, the document is updated and
an OK status update is returned. If validation fails, a set of validation
issues is returned.
:param resource: the name of the resource to which the document belongs.
:param **lookup: document lookup query.
.. versionchanged:: 0.4
Allow abort() to be inoked by callback functions.
'on_update' raised before performing the update on the database.
Support for document versioning.
'on_updated' raised after performing the update on the database.
.. versionchanged:: 0.3
Support for media fields.
When IF_MATCH is disabled, no etag is included in the payload.
Support for new validation format introduced with Cerberus v0.5.
.. versionchanged:: 0.2
Use the new STATUS setting.
Use the new ISSUES setting.
Raise 'on_pre_<method>' event.
.. versionchanged:: 0.1.1
Item-identifier wrapper stripped from both request and response payload.
.. versionchanged:: 0.1.0
Support for optional HATEOAS.
Re-raises `exceptions.Unauthorized`, this could occur if the
`auth_field` condition fails
.. versionchanged:: 0.0.9
More informative error messages.
Support for Python 3.3.
.. versionchanged:: 0.0.8
Let ``werkzeug.exceptions.InternalServerError`` go through as they have
probably been explicitly raised by the data driver.
.. versionchanged:: 0.0.7
Support for Rate-Limiting.
.. versionchanged:: 0.0.6
ETag is now computed without the need of an additional db lookup
.. versionchanged:: 0.0.5
Support for 'aplication/json' Content-Type.
.. versionchanged:: 0.0.4
Added the ``requires_auth`` decorator.
.. versionchanged:: 0.0.3
JSON links. Superflous ``response`` container removed.
"""
payload = payload_()
original = get_document(resource, **lookup)
if not original:
# not found
abort(404)
resource_def = app.config['DOMAIN'][resource]
schema = resource_def['schema']
validator = app.validator(schema, resource)
object_id = original[config.ID_FIELD]
last_modified = None
etag = None
issues = {}
response = {}
if config.BANDWIDTH_SAVER is True:
embedded_fields = []
else:
req = parse_request(resource)
embedded_fields = resolve_embedded_fields(resource, req)
try:
updates = parse(payload, resource)
validation = validator.validate_update(updates, object_id)
if validation:
# sneak in a shadow copy if it wasn't already there
late_versioning_catch(original, resource)
store_media_files(updates, resource, original)
resolve_document_version(updates, resource, 'PATCH', original)
# some datetime precision magic
updates[config.LAST_UPDATED] = \
datetime.utcnow().replace(microsecond=0)
# the mongo driver has a different precision than the python
# datetime. since we don't want to reload the document once it has
# been updated, and we still have to provide an updated etag,
# we're going to update the local version of the 'original'
# document, and we will use it for the etag computation.
updated = original.copy()
# notify callbacks
getattr(app, "on_update")(resource, updates, original)
getattr(app, "on_update_%s" % resource)(updates, original)
updated.update(updates)
app.data.update(resource, object_id, updates)
insert_versioning_documents(resource, updated)
# nofity callbacks
getattr(app, "on_updated")(resource, updates, original)
getattr(app, "on_updated_%s" % resource)(updates, original)
# build the full response document
build_response_document(updated, resource, embedded_fields,
updated)
response = updated
else:
issues = validator.errors
except ValidationError as e:
# TODO should probably log the error and abort 400 instead (when we
# got logging)
issues['validator exception'] = str(e)
except (exceptions.InternalServerError, exceptions.Unauthorized,
exceptions.Forbidden, exceptions.NotFound) as e:
raise e
except Exception as e:
# consider all other exceptions as Bad Requests
abort(400,
description=debug_error_message('An exception occurred: %s' % e))
if len(issues):
response[config.ISSUES] = issues
response[config.STATUS] = config.STATUS_ERR
else:
response[config.STATUS] = config.STATUS_OK
# limit what actually gets sent to minimize bandwidth usage
response = marshal_write_response(response, resource)
return response, last_modified, etag, 200
