def __get__(self, resource, resource_class):
if resource is None:
# Class level access.
obj = self
else:
obj = get_nested_attribute(resource.get_entity(), self.entity_attr)
return obj
def __get__(self, resource, resource_class):
if resource is None:
# Class level access.
obj = self
else:
obj = get_nested_attribute(resource.get_entity(), self.entity_attr)
return obj
def __make_specification(self):
ref_attr, backref_attr = self._get_specification_attributes()
#: Builds the filter specification.
spec_fac = get_filter_specification_factory()
crd = self.descriptor.cardinality
if backref_attr is None:
relatee = get_nested_attribute(self.relator, ref_attr)
if crd.relatee == CARDINALITY_CONSTANTS.MANY:
# This is potentially expensive as we may need to iterate over
# a large collection to create the "contained" specification.
if len(relatee) > 0:
ids = [related.id for related in relatee]
spec = spec_fac.create_contained('id', ids)
else:
# Create impossible search criterion.
spec = spec_fac.create_equal_to('id', -1)
else:
if not relatee is None:
spec = spec_fac.create_equal_to('id', relatee.id)
else:
# Create impossible search criterion.
spec = spec_fac.create_equal_to('id', -1)
else:
if crd.relator == CARDINALITY_CONSTANTS.MANY:
spec = spec_fac.create_contains(backref_attr, self.relator)
else:
spec = spec_fac.create_equal_to(backref_attr, self.relator)
return spec
def __make_specification(self):
ref_attr, backref_attr = self._get_specification_attributes()
#: Builds the filter specification.
spec_fac = get_filter_specification_factory()
crd = self.descriptor.cardinality
if backref_attr is None:
relatee = get_nested_attribute(self.relator, ref_attr)
if crd.relatee == CARDINALITY_CONSTANTS.MANY:
# This is potentially expensive as we may need to iterate over
# a large collection to create the "contained" specification.
if len(relatee) > 0:
ids = [related.id for related in relatee]
spec = spec_fac.create_contained('id', ids)
else:
# Create impossible search criterion.
spec = spec_fac.create_equal_to('id', -1)
else:
if not relatee is None:
spec = spec_fac.create_equal_to('id', relatee.id)
else:
# Create impossible search criterion.
spec = spec_fac.create_equal_to('id', -1)
else:
if crd.relator == CARDINALITY_CONSTANTS.MANY:
spec = spec_fac.create_contains(backref_attr, self.relator)
else:
spec = spec_fac.create_equal_to(backref_attr, self.relator)
return spec
def relatee(self):
ref_attr = self._get_specification_attributes()[0]
try:
rel = get_nested_attribute(self.relator, ref_attr)
except AttributeError:
rel = None
return rel
def get_state_data(cls, entity):
"""
Returns the state data for the given entity.
This also works for unmanaged entities.
"""
attrs = get_domain_class_attribute_iterator(type(entity))
return dict([(attr, get_nested_attribute(entity, attr.entity_attr))
for attr in attrs if not attr.entity_attr is None])
def get_state_data(cls, entity):
"""
Returns the state data for the given entity.
This also works for unmanaged entities.
"""
attrs = get_domain_class_attribute_iterator(type(entity))
return dict([(attr,
get_nested_attribute(entity, attr.entity_attr))
for attr in attrs
if not attr.entity_attr is None])
def __get__(self, resource, resource_class):
if not resource is None:
ent = get_nested_attribute(resource.get_entity(), self.entity_attr)
if not ent is None:
fac = get_member_class(self.attr_type).as_related_member
member = fac(ent, self.make_relationship(resource))
else:
member = None
else:
# class level access
member = self
return member
def __get__(self, resource, resource_class):
if not resource is None:
ent = get_nested_attribute(resource.get_entity(), self.entity_attr)
if not ent is None:
fac = get_member_class(self.attr_type).as_related_member
member = fac(ent, self.make_relationship(resource))
else:
member = None
else:
# class level access
member = self
return member
def __action_one_direction(self, cardinality_relatee, rel_op,
relator, related, attr_name, safe):
if cardinality_relatee == CARDINALITY_CONSTANTS.ONE:
if rel_op == RELATION_OPERATIONS.ADD:
set_nested_attribute(relator, attr_name, related)
elif rel_op == RELATION_OPERATIONS.REMOVE:
set_nested_attribute(relator, attr_name, None)
else:
relatee = get_nested_attribute(relator, attr_name)
if rel_op == RELATION_OPERATIONS.ADD:
if not (safe and related in relatee):
# FIXME: Assuming a list here.
relatee.append(related)
elif rel_op == RELATION_OPERATIONS.REMOVE:
# FIXME: Assuming a list here.
if safe:
try:
relatee.remove(related)
except ValueError:
pass
else:
relatee.remove(related)
def __action_one_direction(self, cardinality_relatee, rel_op, relator,
related, attr_name, safe):
if cardinality_relatee == CARDINALITY_CONSTANTS.ONE:
if rel_op == RELATION_OPERATIONS.ADD:
set_nested_attribute(relator, attr_name, related)
elif rel_op == RELATION_OPERATIONS.REMOVE:
set_nested_attribute(relator, attr_name, None)
else:
relatee = get_nested_attribute(relator, attr_name)
if rel_op == RELATION_OPERATIONS.ADD:
if not (safe and related in relatee):
# FIXME: Assuming a list here.
relatee.append(related)
elif rel_op == RELATION_OPERATIONS.REMOVE:
# FIXME: Assuming a list here.
if safe:
try:
relatee.remove(related)
except ValueError:
pass
else:
relatee.remove(related)
def _get_proxied_attribute_value(self, attribute):
return get_nested_attribute(self._data, attribute.entity_attr)
def _get_relation_attribute_value(self, attribute):
return get_nested_attribute(self._data, attribute.entity_attr)
def _get_proxied_attribute_value(self, attribute):
return get_nested_attribute(self._data, attribute.entity_attr)
def _get_relation_attribute_value(self, attribute):
return get_nested_attribute(self._data, attribute.entity_attr)
