35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
from pytest import raises
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from sqlalchemy_utils import batch_fetch
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from tests import TestCase
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class TestBatchFetch(TestCase):
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def setup_method(self, method):
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TestCase.setup_method(self, method)
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category = self.Category(name=u'Category #1')
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category.articles = [
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self.Article(name=u'Article 1'),
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self.Article(name=u'Article 2')
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]
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category2 = self.Category(name=u'Category #2')
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category2.articles = [
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self.Article(name=u'Article 3'),
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self.Article(name=u'Article 4'),
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self.Article(name=u'Article 5')
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]
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self.session.add(category)
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self.session.add(category2)
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self.session.commit()
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def test_raises_error_if_relationship_not_found(self):
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categories = self.session.query(self.Category).all()
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with raises(AttributeError):
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batch_fetch(categories, 'unknown_relation')
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def test_supports_relationship_attributes(self):
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categories = self.session.query(self.Category).all()
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batch_fetch(categories, self.Category.articles)
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query_count = self.connection.query_count
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categories[0].articles # no lazy load should occur
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assert self.connection.query_count == query_count
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