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from wsme.rest import expose, validate
import wsme.types
from wsmeext.sqlalchemy.types import SQLAlchemyRegistry
class CRUDControllerMeta(type):
def __init__(cls, name, bases, dct):
if cls.__saclass__ is not None:
if cls.__registry__ is None:
cls.__registry__ = wsme.types.registry
if cls.__wstype__ is None:
cls.__wstype__ = cls.__registry__.resolve_type(
SQLAlchemyRegistry.get(
cls.__registry__).getdatatype(cls.__saclass__))
cls.create = expose(
cls.__wstype__,
method='PUT',
wrap=True
)(cls.create)
cls.create = validate(cls.__wstype__)(cls.create)
cls.read = expose(
cls.__wstype__,
method='GET',
wrap=True
)(cls.read)
cls.read = validate(cls.__wstype__)(cls.read)
cls.update = expose(
cls.__wstype__,
method='POST',
wrap=True
)(cls.update)
cls.update = validate(cls.__wstype__)(cls.update)
cls.delete = expose(
method='DELETE',
wrap=True
)(cls.delete)
cls.delete = validate(cls.__wstype__)(cls.delete)
super(CRUDControllerMeta, cls).__init__(name, bases, dct)
class CRUDControllerBase(object):
__registry__ = None
__saclass__ = None
__wstype__ = None
__dbsession__ = None
def _create_one(self, data):
obj = self.__saclass__()
data.to_instance(obj)
self.__dbsession__.add(obj)
return obj
def _get_one(self, ref):
q = self.__dbsession__.query(self.__saclass__)
q = q.filter(ref.get_ref_criterion())
return q.one()
def _update_one(self, data):
obj = self._get_one(data)
if obj is None:
raise ValueError("No match for data=%s" % data)
data.to_instance(obj)
return obj
def _delete(self, ref):
obj = self._get_one(ref)
self.__dbsession__.delete(obj)
def create(self, data):
obj = self._create_one(data)
self.__dbsession__.flush()
return self.__wstype__(obj)
def read(self, ref):
obj = self._get_one(ref)
return self.__wstype__(obj)
def update(self, data):
obj = self._update_one(data)
self.__dbsession__.flush()
return self.__wstype__(obj)
def delete(self, ref):
self._delete(ref)
self.__dbsession__.flush()
return None
CRUDController = CRUDControllerMeta(
'CRUDController', (CRUDControllerBase,), {}
)
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