47 lines
1.3 KiB
Python
47 lines
1.3 KiB
Python
from __future__ import unicode_literals
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import sqlalchemy as sa
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from sqlalchemy_utils import batch_fetch, generic_relationship
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from tests import TestCase
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class TestBatchFetchGenericRelationship(TestCase):
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def create_models(self):
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class Building(self.Base):
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__tablename__ = 'building'
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id = sa.Column(sa.Integer, primary_key=True)
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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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class Event(self.Base):
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__tablename__ = 'event'
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id = sa.Column(sa.Integer, primary_key=True)
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object_type = sa.Column(sa.Unicode(255))
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object_id = sa.Column(sa.Integer, nullable=False)
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object = generic_relationship(object_type, object_id)
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self.Building = Building
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self.User = User
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self.Event = Event
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def test_batch_fetch(self):
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user = self.User()
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self.session.add(user)
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self.session.commit()
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event = self.Event(object=user)
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self.session.add(event)
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self.session.commit()
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events = self.session.query(self.Event).all()
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batch_fetch(events, 'object')
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query_count = self.connection.query_count
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events[0].object
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assert self.connection.query_count == query_count
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