def verify_forward_reference(data, resource, schema, idl):
"""
converts the forward reference URIs to corresponding Row references
Parameters:
data - post/put data
resource - Resource object being accessed
schema = restparser schema object
idl - ovs.db.idl.Idl object
"""
reference_keys = schema.ovs_tables[resource.table].references
verified_references = {}
# check for invalid keys
for key in reference_keys:
if key in data:
category = reference_keys[key].category
relation = reference_keys[key].relation
if category != OVSDB_SCHEMA_CONFIG or \
relation == 'parent':
error = "Invalid reference: %s" % key
raise DataValidationFailed(error)
for key in reference_keys:
if key in data:
# this is either a URI or list of URIs
_refdata = data[key]
notList = False
if type(_refdata) is not types.ListType:
notList = True
_refdata = [_refdata]
# check range
_min = reference_keys[key].n_min
_max = reference_keys[key].n_max
if len(_refdata) < _min or len(_refdata) > _max:
error = "Reference list is out of range for key %s" % key
raise DataValidationFailed(error)
references = []
for uri in _refdata:
verified_resource = parse.parse_url_path(uri, schema, idl)
if verified_resource is None:
error = "Reference %s could not be identified" % uri
raise DataValidationFailed(error)
# get the Row instance of the reference we are adding
while verified_resource.next is not None:
verified_resource = verified_resource.next
row = utils.get_row_from_resource(verified_resource, idl)
references.append(row)
if notList:
references = references[0]
verified_references[key] = references
return verified_references
def _get_row_from_uri(uri, schema, idl):
verified_resource = parse.parse_url_path(uri, schema, idl)
if verified_resource is None:
error = "Reference %s could not be identified" % uri
raise DataValidationFailed(error)
# get the Row instance of the reference we are adding
while verified_resource.next is not None:
verified_resource = verified_resource.next
row = utils.get_row_from_resource(verified_resource, idl)
return row
def delete_resource(resource, schema, txn, idl):
if resource.next is None:
return None
# get the last resource pair
while True:
if resource.next.next is None:
break
resource = resource.next
# Check for invalid resource deletion
if verify.verify_http_method(resource, schema,
REQUEST_TYPE_DELETE) is False:
raise MethodNotAllowed
try:
utils.exec_validators_with_resource(idl, schema, resource,
REQUEST_TYPE_DELETE)
except ValidationError as e:
app_log.debug("Custom validations failed:")
app_log.debug(e.error)
raise DataValidationFailed(e.error)
if resource.relation == OVSDB_SCHEMA_CHILD:
if resource.next.row is None:
raise MethodNotAllowed
row = utils.delete_reference(resource.next, resource, schema, idl)
row.delete()
elif resource.relation == OVSDB_SCHEMA_BACK_REFERENCE:
row = utils.get_row_from_resource(resource.next, idl)
row.delete()
elif resource.relation == OVSDB_SCHEMA_TOP_LEVEL:
utils.delete_all_references(resource.next, schema, idl)
result = txn.commit()
return OvsdbTransactionResult(result)
def delete_resource(resource, schema, txn, idl):
if resource.next is None:
return None
# get the last resource pair
while True:
if resource.next.next is None:
break
resource = resource.next
# Check for invalid resource deletion
if verify.verify_http_method(resource, schema,
REQUEST_TYPE_DELETE) is False:
raise MethodNotAllowed
try:
utils.exec_validators_with_resource(idl, schema, resource,
REQUEST_TYPE_DELETE)
except ValidationError as e:
app_log.debug("Custom validations failed:")
app_log.debug(e.error)
raise DataValidationFailed(e.error)
if resource.relation == OVSDB_SCHEMA_CHILD:
if resource.next.row is None:
parent = idl.tables[resource.table].rows[resource.row]
rows = parent.__getattr__(resource.column)
if isinstance(rows, dict):
rows = rows.values()
parent.__setattr__(resource.column, {})
elif isinstance(rows, ovs.db.idl.Row):
rows = [rows]
parent.__setattr__(resource.column, None)
else:
parent.__setattr__(resource.column, [])
# delete rows from the table
while len(rows):
row = rows.pop()
row.delete()
else:
row = utils.delete_reference(resource.next, resource, schema, idl)
row.delete()
elif resource.relation == OVSDB_SCHEMA_BACK_REFERENCE:
if resource.next.row is None:
refcol = None
parent = idl.tables[resource.table].rows[resource.row]
refkeys = schema.ovs_tables[resource.next.table].references
for key, value in refkeys.iteritems():
if (value.relation == OVSDB_SCHEMA_PARENT
and value.ref_table == resource.table):
refcol = key
break
children = []
for row in idl.tables[resource.next.table].rows.itervalues():
if row.__getattr__(refcol) == parent:
children.append(row.uuid)
for child in children:
row = idl.tables[resource.next.table].rows[child]
row.delete()
else:
row = utils.get_row_from_resource(resource.next, idl)
row.delete()
elif resource.relation == OVSDB_SCHEMA_TOP_LEVEL:
row = utils.delete_all_references(resource.next, schema, idl)
# Check if the table is a top-level root table that is not referenced
# and explicitly delete.
resource_table = resource.next.table
if resource_table not in schema.reference_map.values():
if schema.ovs_tables[resource_table].is_root:
row.delete()
result = txn.commit()
return OvsdbTransactionResult(result)
