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from sqlalchemy.testing import fixtures, eq_
from ..orm._fixtures import FixtureTest
from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import relationship, interfaces, backref
from sqlalchemy.ext.automap import generate_relationship
from sqlalchemy.testing.mock import Mock, call
from sqlalchemy import Column, String, Table, Integer, ForeignKey
from sqlalchemy import testing
class AutomapTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
FixtureTest.define_tables(metadata)
def test_relationship_o2m_default(self):
Base = automap_base(metadata=self.metadata)
Base.prepare()
User = Base.classes.users
Address = Base.classes.addresses
a1 = Address(email_address='e1')
u1 = User(name='u1', addresses_collection=[a1])
assert a1.users is u1
def test_relationship_explicit_override_o2m(self):
Base = automap_base(metadata=self.metadata)
prop = relationship("addresses", collection_class=set)
class User(Base):
__tablename__ = 'users'
addresses_collection = prop
Base.prepare()
assert User.addresses_collection.property is prop
Address = Base.classes.addresses
a1 = Address(email_address='e1')
u1 = User(name='u1', addresses_collection=set([a1]))
assert a1.user is u1
def test_relationship_explicit_override_m2o(self):
Base = automap_base(metadata=self.metadata)
prop = relationship("users")
class Address(Base):
__tablename__ = 'addresses'
users = prop
Base.prepare()
User = Base.classes.users
assert Address.users.property is prop
a1 = Address(email_address='e1')
u1 = User(name='u1', address_collection=[a1])
assert a1.users is u1
def test_relationship_self_referential(self):
Base = automap_base(metadata=self.metadata)
Base.prepare()
Node = Base.classes.nodes
n1 = Node()
n2 = Node()
n1.nodes_collection.append(n2)
assert n2.nodes is n1
def test_naming_schemes(self):
Base = automap_base(metadata=self.metadata)
def classname_for_table(base, tablename, table):
return str("cls_" + tablename)
def name_for_scalar_relationship(base, local_cls, referred_cls, constraint):
return "scalar_" + referred_cls.__name__
def name_for_collection_relationship(base, local_cls, referred_cls, constraint):
return "coll_" + referred_cls.__name__
Base.prepare(
classname_for_table=classname_for_table,
name_for_scalar_relationship=name_for_scalar_relationship,
name_for_collection_relationship=name_for_collection_relationship
)
User = Base.classes.cls_users
Address = Base.classes.cls_addresses
u1 = User()
a1 = Address()
u1.coll_cls_addresses.append(a1)
assert a1.scalar_cls_users is u1
def test_relationship_m2m(self):
Base = automap_base(metadata=self.metadata)
Base.prepare()
Order, Item = Base.classes.orders, Base.classes['items']
o1 = Order()
i1 = Item()
o1.items_collection.append(i1)
assert o1 in i1.orders_collection
def test_relationship_explicit_override_forwards_m2m(self):
Base = automap_base(metadata=self.metadata)
class Order(Base):
__tablename__ = 'orders'
items_collection = relationship("items",
secondary="order_items",
collection_class=set)
Base.prepare()
Item = Base.classes['items']
o1 = Order()
i1 = Item()
o1.items_collection.add(i1)
# it is 'order_collection' because the class name is
# "Order" !
assert isinstance(i1.order_collection, list)
assert o1 in i1.order_collection
def test_relationship_pass_params(self):
Base = automap_base(metadata=self.metadata)
mock = Mock()
def _gen_relationship(base, direction, return_fn, attrname,
local_cls, referred_cls, **kw):
mock(base, direction, attrname)
return generate_relationship(base, direction, return_fn,
attrname, local_cls, referred_cls, **kw)
Base.prepare(generate_relationship=_gen_relationship)
assert set(tuple(c[1]) for c in mock.mock_calls).issuperset([
(Base, interfaces.MANYTOONE, "nodes"),
(Base, interfaces.MANYTOMANY, "keywords_collection"),
(Base, interfaces.MANYTOMANY, "items_collection"),
(Base, interfaces.MANYTOONE, "users"),
(Base, interfaces.ONETOMANY, "addresses_collection"),
])
class AutomapInhTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table('single', metadata,
Column('id', Integer, primary_key=True),
Column('type', String(10))
)
Table('joined_base', metadata,
Column('id', Integer, primary_key=True),
Column('type', String(10))
)
Table('joined_inh', metadata,
Column('id', Integer, ForeignKey('joined_base.id'), primary_key=True),
)
FixtureTest.define_tables(metadata)
def test_single_inheritance_reflect(self):
Base = automap_base()
class Single(Base):
__tablename__ = 'single'
type = Column(String)
__mapper_args__ = {"polymorphic_identity": "u0",
"polymorphic_on": type}
class SubUser1(Single):
__mapper_args__ = {"polymorphic_identity": "u1"}
class SubUser2(Single):
__mapper_args__ = {"polymorphic_identity": "u2"}
Base.prepare(engine=testing.db, reflect=True)
assert SubUser2.__mapper__.inherits is Single.__mapper__
def test_joined_inheritance_reflect(self):
Base = automap_base()
class Joined(Base):
__tablename__ = 'joined_base'
type = Column(String)
__mapper_args__ = {"polymorphic_identity": "u0",
"polymorphic_on": type}
class SubJoined(Joined):
__tablename__ = 'joined_inh'
__mapper_args__ = {"polymorphic_identity": "u1"}
Base.prepare(engine=testing.db, reflect=True)
assert SubJoined.__mapper__.inherits is Joined.__mapper__
assert not Joined.__mapper__.relationships
assert not SubJoined.__mapper__.relationships
def test_conditional_relationship(self):
Base = automap_base()
def _gen_relationship(*arg, **kw):
return None
Base.prepare(engine=testing.db, reflect=True, generate_relationship=_gen_relationship)
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