100 lines
2.9 KiB
Python
100 lines
2.9 KiB
Python
import sqlalchemy as sa
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from pytest import raises
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy_utils import get_class_by_table
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class TestGetClassByTableWithJoinedTableInheritance(object):
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def setup_method(self, method):
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self.Base = declarative_base()
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class Entity(self.Base):
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__tablename__ = 'entity'
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id = sa.Column(sa.Integer, primary_key=True)
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name = sa.Column(sa.String)
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type = sa.Column(sa.String)
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__mapper_args__ = {
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'polymorphic_on': type,
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'polymorphic_identity': 'entity'
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}
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class User(Entity):
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__tablename__ = 'user'
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id = sa.Column(
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sa.Integer,
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sa.ForeignKey(Entity.id, ondelete='CASCADE'),
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primary_key=True
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)
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__mapper_args__ = {
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'polymorphic_identity': 'user'
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}
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self.Entity = Entity
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self.User = User
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def test_returns_class(self):
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assert get_class_by_table(self.Base, self.User.__table__) == self.User
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assert get_class_by_table(
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self.Base,
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self.Entity.__table__
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) == self.Entity
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def test_table_with_no_associated_class(self):
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table = sa.Table(
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'some_table',
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self.Base.metadata,
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sa.Column('id', sa.Integer)
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)
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assert get_class_by_table(self.Base, table) is None
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class TestGetClassByTableWithSingleTableInheritance(object):
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def setup_method(self, method):
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self.Base = declarative_base()
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class Entity(self.Base):
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__tablename__ = 'entity'
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id = sa.Column(sa.Integer, primary_key=True)
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name = sa.Column(sa.String)
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type = sa.Column(sa.String)
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__mapper_args__ = {
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'polymorphic_on': type,
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'polymorphic_identity': 'entity'
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}
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class User(Entity):
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__mapper_args__ = {
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'polymorphic_identity': 'user'
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}
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self.Entity = Entity
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self.User = User
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def test_multiple_classes_without_data_parameter(self):
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with raises(ValueError):
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assert get_class_by_table(
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self.Base,
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self.Entity.__table__
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)
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def test_multiple_classes_with_data_parameter(self):
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assert get_class_by_table(
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self.Base,
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self.Entity.__table__,
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{'type': 'entity'}
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) == self.Entity
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assert get_class_by_table(
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self.Base,
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self.Entity.__table__,
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{'type': 'user'}
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) == self.User
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def test_multiple_classes_with_bogus_data(self):
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with raises(ValueError):
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assert get_class_by_table(
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self.Base,
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self.Entity.__table__,
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{'type': 'unknown'}
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)
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