Source code for factory.alchemy

# -*- coding: utf-8 -*-
# Copyright (c) 2013 Romain Commandé
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from __future__ import unicode_literals
from sqlalchemy.sql.functions import max

from . import base


[docs]class SQLAlchemyOptions(base.FactoryOptions): def _build_default_options(self): return super(SQLAlchemyOptions, self)._build_default_options() + [ base.OptionDefault('sqlalchemy_session', None, inherit=True), ]
[docs]class SQLAlchemyModelFactory(base.Factory): """Factory for SQLAlchemy models. """ _options_class = SQLAlchemyOptions class Meta: abstract = True _OLDSTYLE_ATTRIBUTES = base.Factory._OLDSTYLE_ATTRIBUTES.copy() _OLDSTYLE_ATTRIBUTES.update({ 'FACTORY_SESSION': 'sqlalchemy_session', }) @classmethod def _setup_next_sequence(cls, *args, **kwargs): """Compute the next available PK, based on the 'pk' database field.""" session = cls._meta.sqlalchemy_session model = cls._meta.model pk = getattr(model, model.__mapper__.primary_key[0].name) max_pk = session.query(max(pk)).one()[0] if isinstance(max_pk, int): return max_pk + 1 if max_pk else 1 else: return 1 @classmethod def _create(cls, model_class, *args, **kwargs): """Create an instance of the model, and save it to the database.""" session = cls._meta.sqlalchemy_session obj = model_class(*args, **kwargs) session.add(obj) return obj