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from sqlalchemy import util, exceptions
import types
from sqlalchemy.orm import mapper, Query
def _monkeypatch_query_method(name, ctx, class_):
def do(self, *args, **kwargs):
query = Query(class_, session=ctx.current)
util.warn_deprecated('Query methods on the class are deprecated; use %s.query.%s instead' % (class_.__name__, name))
return getattr(query, name)(*args, **kwargs)
try:
do.__name__ = name
except:
pass
if not hasattr(class_, name):
setattr(class_, name, classmethod(do))
def _monkeypatch_session_method(name, ctx, class_):
def do(self, *args, **kwargs):
session = ctx.current
return getattr(session, name)(self, *args, **kwargs)
try:
do.__name__ = name
except:
pass
if not hasattr(class_, name):
setattr(class_, name, do)
def assign_mapper(ctx, class_, *args, **kwargs):
util.warn_deprecated("assign_mapper is deprecated. Use scoped_session() instead.")
extension = kwargs.pop('extension', None)
if extension is not None:
extension = util.to_list(extension)
extension.append(ctx.mapper_extension)
else:
extension = ctx.mapper_extension
validate = kwargs.pop('validate', False)
if not isinstance(getattr(class_, '__init__'), types.MethodType):
def __init__(self, **kwargs):
for key, value in kwargs.items():
if validate:
if not self.mapper.get_property(key, resolve_synonyms=False, raiseerr=False):
raise exceptions.ArgumentError("Invalid __init__ argument: '%s'" % key)
setattr(self, key, value)
class_.__init__ = __init__
class query(object):
def __getattr__(self, key):
return getattr(ctx.current.query(class_), key)
def __call__(self):
return ctx.current.query(class_)
if not hasattr(class_, 'query'):
class_.query = query()
for name in ('get', 'filter', 'filter_by', 'select', 'select_by', 'selectfirst', 'selectfirst_by', 'selectone', 'selectone_by', 'get_by', 'join_to', 'join_via', 'count', 'count_by', 'options', 'instances'):
_monkeypatch_query_method(name, ctx, class_)
for name in ('refresh', 'expire', 'delete', 'expunge', 'update'):
_monkeypatch_session_method(name, ctx, class_)
m = mapper(class_, extension=extension, *args, **kwargs)
class_.mapper = m
return m
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