def parse_attribute_updates(cls, attribute_updates_json):
attribute_updates = {}
for attr, attr_update_json in attribute_updates_json.iteritems():
validation.validate_attr_name(attr)
validation.validate_object(attr_update_json, attr)
action_type_json = attr_update_json.pop(Props.ACTION, None)
validation.validate_string(action_type_json, Props.ACTION)
value_json = attr_update_json.pop(Props.VALUE, None)
if value_json:
validation.validate_object(value_json, Props.VALUE)
value = cls.parse_typed_attr_value(value_json)
else:
value = None
update_action = models.UpdateItemAction(action_type_json, value)
validation.validate_unexpected_props(attr_update_json, attr)
attribute_updates[attr] = update_action
return attribute_updates
def process_request(self, req, body, project_id, table_name):
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
# parse expected item conditions
expected_item_conditions_json = body.pop(parser.Props.EXPECTED,
None)
if expected_item_conditions_json is not None:
validation.validate_object(expected_item_conditions_json,
parser.Props.EXPECTED)
expected_item_conditions = (
parser.Parser.parse_expected_attribute_conditions(
expected_item_conditions_json))
else:
expected_item_conditions = None
attribute_updates_json = body.pop(parser.Props.ATTRIBUTE_UPDATES,
None)
validation.validate_object(attribute_updates_json,
parser.Props.ATTRIBUTE_UPDATES)
# parse attribute updates
attribute_updates = parser.Parser.parse_attribute_updates(
attribute_updates_json)
# parse key_attributes
key_attributes_json = body.pop(parser.Props.KEY, None)
validation.validate_object(key_attributes_json, parser.Props.KEY)
key_attribute_map = parser.Parser.parse_item_attributes(
key_attributes_json)
# parse return_values param
return_values_json = body.pop(parser.Props.RETURN_VALUES,
parser.Values.RETURN_VALUES_NONE)
validation.validate_string(return_values_json,
parser.Props.RETURN_VALUES)
return_values = UpdateReturnValuesType(return_values_json)
validation.validate_unexpected_props(body, "body")
result, old_item = storage.update_item(
req.context,
table_name,
key_attribute_map=key_attribute_map,
attribute_action_map=attribute_updates,
expected_condition_map=expected_item_conditions)
if not result:
raise exception.BackendInteractionException()
# format response
response = {}
if return_values.type != parser.Values.RETURN_VALUES_NONE:
response[parser.Props.ATTRIBUTES] = (
parser.Parser.format_item_attributes(old_item))
return response
def parse_batch_write_request_items(cls, request_items_json):
request_map = {}
for table_name, request_list_json in request_items_json.iteritems():
validation.validate_table_name(table_name)
validation.validate_list_of_objects(request_list_json, table_name)
request_list_for_table = []
for request_json in request_list_json:
for request_type, request_body in request_json.iteritems():
validation.validate_string(request_type, "request_type")
if request_type == Props.REQUEST_PUT:
validation.validate_object(request_body, request_type)
item = request_body.pop(Props.ITEM, None)
validation.validate_object(item, Props.ITEM)
validation.validate_unexpected_props(
request_body, request_type)
request_list_for_table.append(
models.WriteItemRequest.put(
cls.parse_item_attributes(item)))
elif request_type == Props.REQUEST_DELETE:
validation.validate_object(request_body, request_type)
key = request_body.pop(Props.KEY, None)
validation.validate_object(key, Props.KEY)
validation.validate_unexpected_props(
request_body, request_type)
request_list_for_table.append(
models.WriteItemRequest.delete(
cls.parse_item_attributes(key)))
else:
raise exception.ValidationError(
_("Unsupported request type found: "
"%(request_type)s"),
request_type=request_type)
request_map[table_name] = request_list_for_table
return request_map
def parse_attribute_updates(cls, attribute_updates_json):
attribute_updates = {}
for attr, attr_update_json in attribute_updates_json.iteritems():
validation.validate_attr_name(attr)
validation.validate_object(attr_update_json, attr)
action_type_json = attr_update_json.pop(Props.ACTION, None)
validation.validate_string(action_type_json, Props.ACTION)
value_json = attr_update_json.pop(Props.VALUE, None)
if value_json:
validation.validate_object(value_json, Props.VALUE)
value = cls.parse_typed_attr_value(value_json)
else:
value = None
update_action = models.UpdateItemAction(action_type_json, value)
validation.validate_unexpected_props(attr_update_json, attr)
attribute_updates[attr] = update_action
return attribute_updates
def delete_item(req, project_id, table_name):
"""Deletes a single item in a table by primary key. """
with probe.Probe(__name__ + '.jsonschema.validate'):
body = req.json_body
validation.validate_object(body, "body")
# parse expected item conditions
expected_item_conditions_json = body.pop(parser.Props.EXPECTED,
None)
if expected_item_conditions_json:
validation.validate_object(expected_item_conditions_json,
parser.Props.EXPECTED)
expected_item_conditions = (
parser.Parser.parse_expected_attribute_conditions(
expected_item_conditions_json
)
)
else:
expected_item_conditions = None
# parse key_attributes
key_attributes_json = body.pop(parser.Props.KEY, None)
validation.validate_object(key_attributes_json, parser.Props.KEY)
key_attributes = parser.Parser.parse_item_attributes(
key_attributes_json
)
# parse return_values param
return_values_json = body.pop(
parser.Props.RETURN_VALUES, parser.Values.RETURN_VALUES_NONE
)
validation.validate_string(return_values_json,
parser.Props.RETURN_VALUES)
return_values = models.DeleteReturnValuesType(return_values_json)
validation.validate_unexpected_props(body, "body")
# delete item
storage.delete_item(project_id, table_name, key_attributes,
expected_condition_map=expected_item_conditions)
# format response
response = {}
if return_values.type != parser.Values.RETURN_VALUES_NONE:
# TODO(cwang):
# It is needed to return all deleted item attributes
#
response[parser.Props.ATTRIBUTES] = (
parser.Parser.format_item_attributes(key_attributes)
)
return response
def process_request(self, req, body, project_id, table_name):
utils.check_project_id(req.context, project_id)
req.context.tenant = project_id
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
expected = body.pop(parser.Props.EXPECTED, {})
validation.validate_object(expected, parser.Props.EXPECTED)
# parse expected item conditions
expected_item_conditions = (
parser.Parser.parse_expected_attribute_conditions(expected)
)
item = body.pop(parser.Props.ITEM, None)
validation.validate_object(item, parser.Props.ITEM)
# parse item
item_attributes = parser.Parser.parse_item_attributes(item)
# parse return_values param
return_values_json = body.pop(
parser.Props.RETURN_VALUES, parser.Values.RETURN_VALUES_NONE
)
validation.validate_string(return_values_json,
parser.Props.RETURN_VALUES)
return_values = InsertReturnValuesType(return_values_json)
# parse return_values param
time_to_live = body.pop(
parser.Props.TIME_TO_LIVE, None
)
if time_to_live is not None:
time_to_live = validation.validate_integer(
time_to_live, parser.Props.TIME_TO_LIVE, min_val=0
)
validation.validate_unexpected_props(body, "body")
# put item
result, old_item = storage.put_item(
req.context, table_name, item_attributes,
return_values=return_values,
if_not_exist=False,
expected_condition_map=expected_item_conditions,
)
response = {}
if old_item:
response[parser.Props.ATTRIBUTES] = (
parser.Parser.format_item_attributes(old_item)
)
return response
def process_request(self, req, body, project_id, table_name):
utils.check_project_id(req.context, project_id)
req.context.tenant = project_id
with probe.Probe(__name__ + '.jsonschema.validate'):
validation.validate_object(body, "body")
# parse expected item conditions
expected_item_conditions_json = body.pop(parser.Props.EXPECTED,
None)
if expected_item_conditions_json:
validation.validate_object(expected_item_conditions_json,
parser.Props.EXPECTED)
expected_item_conditions = (
parser.Parser.parse_expected_attribute_conditions(
expected_item_conditions_json))
else:
expected_item_conditions = None
# parse key_attributes
key_attributes_json = body.pop(parser.Props.KEY, None)
validation.validate_object(key_attributes_json, parser.Props.KEY)
key_attributes = parser.Parser.parse_item_attributes(
key_attributes_json)
# parse return_values param
return_values_json = body.pop(parser.Props.RETURN_VALUES,
parser.Values.RETURN_VALUES_NONE)
validation.validate_string(return_values_json,
parser.Props.RETURN_VALUES)
return_values = DeleteReturnValuesType(return_values_json)
validation.validate_unexpected_props(body, "body")
# delete item
storage.delete_item(req.context,
table_name,
key_attributes,
expected_condition_map=expected_item_conditions)
# format response
response = {}
if return_values.type != parser.Values.RETURN_VALUES_NONE:
# TODO(cwang):
# It is needed to return all deleted item attributes
#
response[parser.Props.ATTRIBUTES] = (
parser.Parser.format_item_attributes(key_attributes))
return response
def process_request(self, req, body, project_id, table_name):
utils.check_project_id(req.context, project_id)
req.context.tenant = project_id
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
expected = body.pop(parser.Props.EXPECTED, {})
validation.validate_object(expected, parser.Props.EXPECTED)
# parse expected item conditions
expected_item_conditions = (
parser.Parser.parse_expected_attribute_conditions(expected))
item = body.pop(parser.Props.ITEM, None)
validation.validate_object(item, parser.Props.ITEM)
# parse item
item_attributes = parser.Parser.parse_item_attributes(item)
# parse return_values param
return_values_json = body.pop(parser.Props.RETURN_VALUES,
parser.Values.RETURN_VALUES_NONE)
validation.validate_string(return_values_json,
parser.Props.RETURN_VALUES)
return_values = InsertReturnValuesType(return_values_json)
# parse return_values param
time_to_live = body.pop(parser.Props.TIME_TO_LIVE, None)
if time_to_live is not None:
time_to_live = validation.validate_integer(
time_to_live, parser.Props.TIME_TO_LIVE, min_val=0)
validation.validate_unexpected_props(body, "body")
# put item
result, old_item = storage.put_item(
req.context,
table_name,
item_attributes,
return_values=return_values,
if_not_exist=False,
expected_condition_map=expected_item_conditions,
)
response = {}
if old_item:
response[parser.Props.ATTRIBUTES] = (
parser.Parser.format_item_attributes(old_item))
return response
def parse_batch_write_request_items(cls, request_items_json):
request_map = {}
for table_name, request_list_json in request_items_json.iteritems():
validation.validate_table_name(table_name)
validation.validate_list_of_objects(request_list_json, table_name)
request_list_for_table = []
for request_json in request_list_json:
for request_type, request_body in request_json.iteritems():
validation.validate_string(request_type, "request_type")
if request_type == Props.REQUEST_PUT:
validation.validate_object(request_body, request_type)
item = request_body.pop(Props.ITEM, None)
validation.validate_object(item, Props.ITEM)
validation.validate_unexpected_props(request_body,
request_type)
request_list_for_table.append(
models.WriteItemRequest.put(
cls.parse_item_attributes(item)
)
)
elif request_type == Props.REQUEST_DELETE:
validation.validate_object(request_body, request_type)
key = request_body.pop(Props.KEY, None)
validation.validate_object(key, Props.KEY)
validation.validate_unexpected_props(request_body,
request_type)
request_list_for_table.append(
models.WriteItemRequest.delete(
cls.parse_item_attributes(key)
)
)
else:
raise exception.ValidationError(
_("Unsupported request type found: "
"%(request_type)s"),
request_type=request_type
)
request_map[table_name] = request_list_for_table
return request_map
def parse_expected_attribute_conditions(
cls, expected_attribute_conditions_json):
expected_attribute_conditions = {}
for (attr_name_json, condition_json) in (
expected_attribute_conditions_json.iteritems()):
validation.validate_attr_name(attr_name_json)
validation.validate_object(condition_json, attr_name_json)
if len(condition_json) != 1:
raise exception.ValidationError(
_("Can't recognize attribute expected condition format: "
"'%(attr)s'"),
attr=json.dumps(condition_json)
)
(condition_type, condition_value) = condition_json.popitem()
validation.validate_string(condition_type, "condition type")
if condition_type == Props.VALUE:
validation.validate_object(condition_value, Props.VALUE)
expected_attribute_conditions[attr_name_json] = [
models.ExpectedCondition.eq(
cls.parse_typed_attr_value(condition_value)
)
]
elif condition_type == Props.EXISTS:
validation.validate_boolean(condition_value, Props.EXISTS)
expected_attribute_conditions[attr_name_json] = [
models.ExpectedCondition.not_null() if condition_value else
models.ExpectedCondition.null()
]
else:
raise exception.ValidationError(
_("Unsupported condition type found: %(condition_type)s"),
condition_type=condition_type
)
return expected_attribute_conditions
def parse_expected_attribute_conditions(
cls, expected_attribute_conditions_json):
expected_attribute_conditions = {}
for (attr_name_json, condition_json) in (
expected_attribute_conditions_json.iteritems()):
validation.validate_attr_name(attr_name_json)
validation.validate_object(condition_json, attr_name_json)
if len(condition_json) != 1:
raise ValidationError(
_("Can't recognize attribute expected condition format: "
"'%(attr)s'"),
attr=json.dumps(condition_json)
)
(condition_type, condition_value) = condition_json.popitem()
validation.validate_string(condition_type, "condition type")
if condition_type == Props.VALUE:
validation.validate_object(condition_value, Props.VALUE)
expected_attribute_conditions[attr_name_json] = [
ExpectedCondition.eq(
cls.parse_typed_attr_value(condition_value)
)
]
elif condition_type == Props.EXISTS:
validation.validate_boolean(condition_value, Props.EXISTS)
expected_attribute_conditions[attr_name_json] = [
ExpectedCondition.not_null() if condition_value else
ExpectedCondition.null()
]
else:
raise ValidationError(
_("Unsupported condition type found: %(condition_type)s"),
condition_type=condition_type
)
return expected_attribute_conditions
def process_request(self, req, body, project_id, table_name):
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
# parse expected item conditions
expected_item_conditions_json = body.pop(parser.Props.EXPECTED,
None)
if expected_item_conditions_json is not None:
validation.validate_object(expected_item_conditions_json,
parser.Props.EXPECTED)
expected_item_conditions = (
parser.Parser.parse_expected_attribute_conditions(
expected_item_conditions_json
)
)
else:
expected_item_conditions = None
attribute_updates_json = body.pop(parser.Props.ATTRIBUTE_UPDATES,
None)
validation.validate_object(attribute_updates_json,
parser.Props.ATTRIBUTE_UPDATES)
# parse attribute updates
attribute_updates = parser.Parser.parse_attribute_updates(
attribute_updates_json
)
# parse key_attributes
key_attributes_json = body.pop(parser.Props.KEY, None)
validation.validate_object(key_attributes_json, parser.Props.KEY)
key_attribute_map = parser.Parser.parse_item_attributes(
key_attributes_json
)
# parse return_values param
return_values_json = body.pop(
parser.Props.RETURN_VALUES, parser.Values.RETURN_VALUES_NONE
)
validation.validate_string(return_values_json,
parser.Props.RETURN_VALUES)
return_values = UpdateReturnValuesType(return_values_json)
validation.validate_unexpected_props(body, "body")
result, old_item = storage.update_item(
req.context,
table_name,
key_attribute_map=key_attribute_map,
attribute_action_map=attribute_updates,
expected_condition_map=expected_item_conditions)
if not result:
raise exception.BackendInteractionException()
# format response
response = {}
if return_values.type != parser.Values.RETURN_VALUES_NONE:
response[parser.Props.ATTRIBUTES] = (
parser.Parser.format_item_attributes(old_item)
)
return response
def scan(self, req, body, project_id, table_name):
utils.check_project_id(req.context, project_id)
req.context.tenant = project_id
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
# get attributes_to_get
attributes_to_get = body.pop(parser.Props.ATTRIBUTES_TO_GET, None)
if attributes_to_get:
validation.validate_list(attributes_to_get,
parser.Props.ATTRIBUTES_TO_GET)
for attr_name in attributes_to_get:
validation.validate_attr_name(attr_name)
select = body.pop(parser.Props.SELECT, None)
if select is None:
if attributes_to_get:
select = models.SelectType.SELECT_TYPE_SPECIFIC
else:
select = models.SelectType.SELECT_TYPE_ALL
else:
validation.validate_string(select, parser.Props.SELECT)
select_type = models.SelectType(select, attributes_to_get)
limit = body.pop(parser.Props.LIMIT, None)
if limit is not None:
limit = validation.validate_integer(limit, parser.Props.LIMIT,
min_val=0)
# parse exclusive_start_key_attributes
exclusive_start_key_attributes_json = body.pop(
parser.Props.EXCLUSIVE_START_KEY, None)
if exclusive_start_key_attributes_json is not None:
validation.validate_object(exclusive_start_key_attributes_json,
parser.Props.EXCLUSIVE_START_KEY)
exclusive_start_key_attributes = (
parser.Parser.parse_item_attributes(
exclusive_start_key_attributes_json
)
)
else:
exclusive_start_key_attributes = None
scan_filter_json = body.pop(parser.Props.SCAN_FILTER, None)
if scan_filter_json:
validation.validate_object(scan_filter_json,
parser.Props.SCAN_FILTER)
condition_map = parser.Parser.parse_attribute_conditions(
scan_filter_json, condition_class=ScanCondition
)
else:
condition_map = None
total_segments = body.pop(parser.Props.TOTAL_SEGMENTS, 1)
total_segments = validation.validate_integer(
total_segments, parser.Props.TOTAL_SEGMENTS, min_val=1,
max_val=4096
)
segment = body.pop(parser.Props.SEGMENT, 0)
segment = validation.validate_integer(
segment, parser.Props.SEGMENT, min_val=0,
max_val=total_segments
)
validation.validate_unexpected_props(body, "body")
result = storage.scan(
req.context, table_name, condition_map,
attributes_to_get=attributes_to_get, limit=limit,
exclusive_start_key=exclusive_start_key_attributes)
response = {
parser.Props.COUNT: result.count,
parser.Props.SCANNED_COUNT: result.scanned_count
}
if not select_type.is_count:
response[parser.Props.ITEMS] = [
parser.Parser.format_item_attributes(row)
for row in result.items]
if result.last_evaluated_key:
response[parser.Props.LAST_EVALUATED_KEY] = (
parser.Parser.format_item_attributes(
result.last_evaluated_key
)
)
return response
def update_item(req, project_id, table_name):
"""
Edits(or inserts if item does not already exist) an item's attributes.
"""
with probe.Probe(__name__ + '.validation'):
body = req.json_body
validation.validate_object(body, "body")
# parse expected item conditions
expected_item_conditions_json = body.pop(parser.Props.EXPECTED,
None)
if expected_item_conditions_json is not None:
validation.validate_object(expected_item_conditions_json,
parser.Props.EXPECTED)
expected_item_conditions = (
parser.Parser.parse_expected_attribute_conditions(
expected_item_conditions_json
)
)
else:
expected_item_conditions = None
attribute_updates_json = body.pop(parser.Props.ATTRIBUTE_UPDATES,
None)
validation.validate_object(attribute_updates_json,
parser.Props.ATTRIBUTE_UPDATES)
# parse attribute updates
attribute_updates = parser.Parser.parse_attribute_updates(
attribute_updates_json
)
# parse key_attributes
key_attributes_json = body.pop(parser.Props.KEY, None)
validation.validate_object(key_attributes_json, parser.Props.KEY)
key_attribute_map = parser.Parser.parse_item_attributes(
key_attributes_json
)
# parse return_values param
return_values_json = body.pop(
parser.Props.RETURN_VALUES, parser.Values.RETURN_VALUES_NONE
)
validation.validate_string(return_values_json,
parser.Props.RETURN_VALUES)
return_values = models.UpdateReturnValuesType(return_values_json)
validation.validate_unexpected_props(body, "body")
result, old_item = storage.update_item(
project_id,
table_name,
key_attribute_map=key_attribute_map,
attribute_action_map=attribute_updates,
expected_condition_map=expected_item_conditions)
if not result:
raise exception.BackendInteractionError("Unexpected empty result")
# format response
response = {}
if return_values.type != parser.Values.RETURN_VALUES_NONE:
response[parser.Props.ATTRIBUTES] = (
parser.Parser.format_item_attributes(old_item)
if old_item else {}
)
return response
def query(self, req, body, project_id, table_name):
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
# get attributes_to_get
attributes_to_get = body.pop(parser.Props.ATTRIBUTES_TO_GET, None)
if attributes_to_get is not None:
validation.validate_list(attributes_to_get,
parser.Props.ATTRIBUTES_TO_GET)
for attr_name in attributes_to_get:
validation.validate_attr_name(attr_name)
index_name = body.pop(parser.Props.INDEX_NAME, None)
if index_name is not None:
validation.validate_index_name(index_name)
select = body.pop(parser.Props.SELECT, None)
if select is None:
if attributes_to_get:
select = models.SelectType.SELECT_TYPE_SPECIFIC
else:
if index_name is not None:
select = models.SelectType.SELECT_TYPE_ALL_PROJECTED
else:
select = models.SelectType.SELECT_TYPE_ALL
else:
validation.validate_string(select, parser.Props.SELECT)
select_type = models.SelectType(select, attributes_to_get)
# parse exclusive_start_key_attributes
exclusive_start_key_attributes_json = body.pop(
parser.Props.EXCLUSIVE_START_KEY, None)
if exclusive_start_key_attributes_json is not None:
validation.validate_object(exclusive_start_key_attributes_json,
parser.Props.EXCLUSIVE_START_KEY)
exclusive_start_key_attributes = (
parser.Parser.parse_item_attributes(
exclusive_start_key_attributes_json))
else:
exclusive_start_key_attributes = None
# parse indexed_condition_map
key_conditions = body.pop(parser.Props.KEY_CONDITIONS, None)
validation.validate_object(key_conditions,
parser.Props.KEY_CONDITIONS)
indexed_condition_map = parser.Parser.parse_attribute_conditions(
key_conditions, condition_class=IndexedCondition)
# TODO(dukhlov):
# it would be nice to validate given table_name, key_attributes and
# attributes_to_get to schema expectation
consistent_read = body.pop(parser.Props.CONSISTENT_READ, False)
validation.validate_boolean(consistent_read,
parser.Props.CONSISTENT_READ)
limit = body.pop(parser.Props.LIMIT, None)
if limit is not None:
limit = validation.validate_integer(limit,
parser.Props.LIMIT,
min_val=0)
scan_forward = body.pop(parser.Props.SCAN_INDEX_FORWARD, None)
if scan_forward is not None:
validation.validate_boolean(scan_forward,
parser.Props.SCAN_INDEX_FORWARD)
order_type = (models.ORDER_TYPE_ASC
if scan_forward else models.ORDER_TYPE_DESC)
else:
order_type = None
validation.validate_unexpected_props(body, "body")
# select item
result = storage.query(
req.context,
table_name,
indexed_condition_map,
select_type=select_type,
index_name=index_name,
limit=limit,
consistent=consistent_read,
order_type=order_type,
exclusive_start_key=exclusive_start_key_attributes)
# format response
if select_type.type == models.SelectType.SELECT_TYPE_COUNT:
response = {parser.Props.COUNT: result.count}
else:
response = {
parser.Props.COUNT:
result.count,
parser.Props.ITEMS: [
parser.Parser.format_item_attributes(row)
for row in result.items
]
}
if limit == result.count:
response[parser.Props.LAST_EVALUATED_KEY] = (
parser.Parser.format_item_attributes(
result.last_evaluated_key))
return response
def query(self, req, body, project_id, table_name):
utils.check_project_id(req.context, project_id)
req.context.tenant = project_id
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
# get attributes_to_get
attributes_to_get = body.pop(parser.Props.ATTRIBUTES_TO_GET, None)
if attributes_to_get:
validation.validate_list(attributes_to_get,
parser.Props.ATTRIBUTES_TO_GET)
for attr_name in attributes_to_get:
validation.validate_attr_name(attr_name)
index_name = body.pop(parser.Props.INDEX_NAME, None)
if index_name is not None:
validation.validate_index_name(index_name)
select = body.pop(parser.Props.SELECT, None)
if select is None:
if attributes_to_get:
select = models.SelectType.SELECT_TYPE_SPECIFIC
else:
if index_name is not None:
select = models.SelectType.SELECT_TYPE_ALL_PROJECTED
else:
select = models.SelectType.SELECT_TYPE_ALL
else:
validation.validate_string(select, parser.Props.SELECT)
select_type = models.SelectType(select, attributes_to_get)
# parse exclusive_start_key_attributes
exclusive_start_key_attributes_json = body.pop(
parser.Props.EXCLUSIVE_START_KEY, None)
if exclusive_start_key_attributes_json is not None:
validation.validate_object(exclusive_start_key_attributes_json,
parser.Props.EXCLUSIVE_START_KEY)
exclusive_start_key_attributes = (
parser.Parser.parse_item_attributes(
exclusive_start_key_attributes_json
)
)
else:
exclusive_start_key_attributes = None
# parse indexed_condition_map
key_conditions = body.pop(parser.Props.KEY_CONDITIONS, None)
validation.validate_object(key_conditions,
parser.Props.KEY_CONDITIONS)
indexed_condition_map = parser.Parser.parse_attribute_conditions(
key_conditions, condition_class=IndexedCondition
)
# TODO(dukhlov):
# it would be nice to validate given table_name, key_attributes and
# attributes_to_get to schema expectation
consistent_read = body.pop(parser.Props.CONSISTENT_READ, False)
validation.validate_boolean(consistent_read,
parser.Props.CONSISTENT_READ)
limit = body.pop(parser.Props.LIMIT, None)
if limit is not None:
limit = validation.validate_integer(limit, parser.Props.LIMIT,
min_val=0)
scan_forward = body.pop(parser.Props.SCAN_INDEX_FORWARD, None)
if scan_forward is not None:
validation.validate_boolean(scan_forward,
parser.Props.SCAN_INDEX_FORWARD)
order_type = (
models.ORDER_TYPE_ASC if scan_forward else
models.ORDER_TYPE_DESC
)
else:
order_type = None
validation.validate_unexpected_props(body, "body")
# select item
result = storage.select_item(
req.context, table_name, indexed_condition_map,
select_type=select_type, index_name=index_name, limit=limit,
consistent=consistent_read, order_type=order_type,
exclusive_start_key=exclusive_start_key_attributes
)
# format response
if select_type.type == models.SelectType.SELECT_TYPE_COUNT:
response = {
parser.Props.COUNT: result.count
}
else:
response = {
parser.Props.COUNT: result.count,
parser.Props.ITEMS: [
parser.Parser.format_item_attributes(row)
for row in result.items
]
}
if limit == result.count:
response[parser.Props.LAST_EVALUATED_KEY] = (
parser.Parser.format_item_attributes(
result.last_evaluated_key)
)
return response
def scan(self, req, body, project_id, table_name):
utils.check_project_id(req.context, project_id)
req.context.tenant = project_id
with probe.Probe(__name__ + '.validation'):
validation.validate_object(body, "body")
# get attributes_to_get
attributes_to_get = body.pop(parser.Props.ATTRIBUTES_TO_GET, None)
if attributes_to_get:
validation.validate_list(attributes_to_get,
parser.Props.ATTRIBUTES_TO_GET)
for attr_name in attributes_to_get:
validation.validate_attr_name(attr_name)
select = body.pop(parser.Props.SELECT, None)
if select is None:
if attributes_to_get:
select = models.SelectType.SELECT_TYPE_SPECIFIC
else:
select = models.SelectType.SELECT_TYPE_ALL
else:
validation.validate_string(select, parser.Props.SELECT)
select_type = models.SelectType(select, attributes_to_get)
limit = body.pop(parser.Props.LIMIT, None)
if limit is not None:
limit = validation.validate_integer(limit,
parser.Props.LIMIT,
min_val=0)
# parse exclusive_start_key_attributes
exclusive_start_key_attributes_json = body.pop(
parser.Props.EXCLUSIVE_START_KEY, None)
if exclusive_start_key_attributes_json is not None:
validation.validate_object(exclusive_start_key_attributes_json,
parser.Props.EXCLUSIVE_START_KEY)
exclusive_start_key_attributes = (
parser.Parser.parse_item_attributes(
exclusive_start_key_attributes_json))
else:
exclusive_start_key_attributes = None
scan_filter_json = body.pop(parser.Props.SCAN_FILTER, None)
if scan_filter_json:
validation.validate_object(scan_filter_json,
parser.Props.SCAN_FILTER)
condition_map = parser.Parser.parse_attribute_conditions(
scan_filter_json, condition_class=ScanCondition)
else:
condition_map = None
total_segments = body.pop(parser.Props.TOTAL_SEGMENTS, 1)
total_segments = validation.validate_integer(
total_segments,
parser.Props.TOTAL_SEGMENTS,
min_val=1,
max_val=4096)
segment = body.pop(parser.Props.SEGMENT, 0)
segment = validation.validate_integer(segment,
parser.Props.SEGMENT,
min_val=0,
max_val=total_segments)
validation.validate_unexpected_props(body, "body")
result = storage.scan(
req.context,
table_name,
condition_map,
attributes_to_get=attributes_to_get,
limit=limit,
exclusive_start_key=exclusive_start_key_attributes)
response = {
parser.Props.COUNT: result.count,
parser.Props.SCANNED_COUNT: result.scanned_count
}
if not select_type.is_count:
response[parser.Props.ITEMS] = [
parser.Parser.format_item_attributes(row)
for row in result.items
]
if result.last_evaluated_key:
response[parser.Props.LAST_EVALUATED_KEY] = (
parser.Parser.format_item_attributes(
result.last_evaluated_key))
return response
