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import pytest
import sqlalchemy as sa
from sqlalchemy_utils import get_referencing_foreign_keys
class TestGetReferencingFksWithCompositeKeys:
@pytest.fixture
def User(self, Base):
class User(Base):
__tablename__ = 'user'
first_name = sa.Column(sa.Unicode(255), primary_key=True)
last_name = sa.Column(sa.Unicode(255), primary_key=True)
return User
@pytest.fixture
def Article(self, Base, User):
class Article(Base):
__tablename__ = 'article'
id = sa.Column(sa.Integer, primary_key=True)
author_first_name = sa.Column(sa.Unicode(255))
author_last_name = sa.Column(sa.Unicode(255))
__table_args__ = (
sa.ForeignKeyConstraint(
[author_first_name, author_last_name],
[User.first_name, User.last_name]
),
)
return Article
@pytest.fixture
def init_models(self, User, Article):
pass
def test_with_declarative_class(self, User, Article):
fks = get_referencing_foreign_keys(User)
assert Article.__table__.foreign_keys == fks
def test_with_table(self, User, Article):
fks = get_referencing_foreign_keys(User.__table__)
assert Article.__table__.foreign_keys == fks
class TestGetReferencingFksWithInheritance:
@pytest.fixture
def User(self, Base):
class User(Base):
__tablename__ = 'user'
id = sa.Column(sa.Integer, primary_key=True)
type = sa.Column(sa.Unicode)
first_name = sa.Column(sa.Unicode(255))
last_name = sa.Column(sa.Unicode(255))
__mapper_args__ = {
'polymorphic_on': 'type'
}
return User
@pytest.fixture
def Admin(self, User):
class Admin(User):
__tablename__ = 'admin'
id = sa.Column(
sa.Integer, sa.ForeignKey(User.id), primary_key=True
)
__mapper_args__ = {
'polymorphic_identity': 'admin'
}
return Admin
@pytest.fixture
def TextItem(self, Base, User):
class TextItem(Base):
__tablename__ = 'textitem'
id = sa.Column(sa.Integer, primary_key=True)
type = sa.Column(sa.Unicode)
author_id = sa.Column(sa.Integer, sa.ForeignKey(User.id))
__mapper_args__ = {
'polymorphic_on': 'type'
}
return TextItem
@pytest.fixture
def Article(self, TextItem):
class Article(TextItem):
__tablename__ = 'article'
id = sa.Column(
sa.Integer, sa.ForeignKey(TextItem.id), primary_key=True
)
__mapper_args__ = {
'polymorphic_identity': 'article'
}
return Article
@pytest.fixture
def init_models(self, User, Admin, TextItem, Article):
pass
def test_with_declarative_class(self, Admin, TextItem):
fks = get_referencing_foreign_keys(Admin)
assert TextItem.__table__.foreign_keys == fks
def test_with_table(self, Admin):
fks = get_referencing_foreign_keys(Admin.__table__)
assert fks == set()
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