120 lines
3.9 KiB
Python
120 lines
3.9 KiB
Python
import sqlalchemy as sa
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from sqlalchemy_utils import dependent_objects, get_referencing_foreign_keys
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from tests import TestCase
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class TestDependentObjects(TestCase):
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def create_models(self):
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class User(self.Base):
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__tablename__ = 'user'
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id = sa.Column(sa.Integer, primary_key=True)
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first_name = sa.Column(sa.Unicode(255))
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last_name = sa.Column(sa.Unicode(255))
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class Article(self.Base):
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__tablename__ = 'article'
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id = sa.Column(sa.Integer, primary_key=True)
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author_id = sa.Column(sa.Integer, sa.ForeignKey('user.id'))
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owner_id = sa.Column(
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sa.Integer, sa.ForeignKey('user.id', ondelete='SET NULL')
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)
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author = sa.orm.relationship(User, foreign_keys=[author_id])
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owner = sa.orm.relationship(User, foreign_keys=[owner_id])
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class BlogPost(self.Base):
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__tablename__ = 'blog_post'
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id = sa.Column(sa.Integer, primary_key=True)
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owner_id = sa.Column(
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sa.Integer, sa.ForeignKey('user.id', ondelete='CASCADE')
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)
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owner = sa.orm.relationship(User)
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self.User = User
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self.Article = Article
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self.BlogPost = BlogPost
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def test_returns_all_dependent_objects(self):
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user = self.User(first_name=u'John')
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articles = [
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self.Article(author=user),
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self.Article(),
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self.Article(owner=user),
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self.Article(author=user, owner=user)
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]
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self.session.add_all(articles)
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self.session.commit()
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deps = list(dependent_objects(user))
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assert len(deps) == 3
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assert articles[0] in deps
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assert articles[2] in deps
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assert articles[3] in deps
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def test_with_foreign_keys_parameter(self):
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user = self.User(first_name=u'John')
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objects = [
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self.Article(author=user),
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self.Article(),
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self.Article(owner=user),
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self.Article(author=user, owner=user),
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self.BlogPost(owner=user)
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]
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self.session.add_all(objects)
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self.session.commit()
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deps = list(
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dependent_objects(
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user,
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(
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fk for fk in get_referencing_foreign_keys(self.User)
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if fk.ondelete == 'RESTRICT' or fk.ondelete is None
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)
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).limit(5)
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)
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assert len(deps) == 2
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assert objects[0] in deps
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assert objects[3] in deps
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class TestDependentObjectsWithCompositeKeys(TestCase):
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def create_models(self):
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class User(self.Base):
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__tablename__ = 'user'
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first_name = sa.Column(sa.Unicode(255), primary_key=True)
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last_name = sa.Column(sa.Unicode(255), primary_key=True)
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class Article(self.Base):
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__tablename__ = 'article'
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id = sa.Column(sa.Integer, primary_key=True)
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author_first_name = sa.Column(sa.Unicode(255))
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author_last_name = sa.Column(sa.Unicode(255))
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__table_args__ = (
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sa.ForeignKeyConstraint(
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[author_first_name, author_last_name],
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[User.first_name, User.last_name]
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),
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)
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author = sa.orm.relationship(User)
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self.User = User
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self.Article = Article
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def test_returns_all_dependent_objects(self):
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user = self.User(first_name=u'John', last_name=u'Smith')
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articles = [
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self.Article(author=user),
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self.Article(),
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self.Article(),
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self.Article(author=user)
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]
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self.session.add_all(articles)
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self.session.commit()
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deps = list(dependent_objects(user))
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assert len(deps) == 2
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assert articles[0] in deps
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assert articles[3] in deps
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