89 lines
2.9 KiB
Python
89 lines
2.9 KiB
Python
import sqlalchemy as sa
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from sqlalchemy_utils import aggregated
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from tests import TestCase
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class Test3LevelDeepOneToMany(TestCase):
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dns = 'postgres://postgres@localhost/sqlalchemy_utils_test'
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def create_models(self):
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class Catalog(self.Base):
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__tablename__ = 'catalog'
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id = sa.Column(sa.Integer, primary_key=True)
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@aggregated(
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'categories.sub_categories.products',
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sa.Column(sa.Integer, default=0)
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)
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def product_count(self):
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return sa.func.count('1')
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categories = sa.orm.relationship('Category', backref='catalog')
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class Category(self.Base):
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__tablename__ = 'category'
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id = sa.Column(sa.Integer, primary_key=True)
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catalog_id = sa.Column(sa.Integer, sa.ForeignKey('catalog.id'))
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sub_categories = sa.orm.relationship(
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'SubCategory', backref='category'
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)
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class SubCategory(self.Base):
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__tablename__ = 'sub_category'
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id = sa.Column(sa.Integer, primary_key=True)
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category_id = sa.Column(sa.Integer, sa.ForeignKey('category.id'))
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products = sa.orm.relationship('Product', backref='sub_category')
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class Product(self.Base):
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__tablename__ = 'product'
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id = sa.Column(sa.Integer, primary_key=True)
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price = sa.Column(sa.Numeric)
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sub_category_id = sa.Column(
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sa.Integer, sa.ForeignKey('sub_category.id')
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)
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self.Catalog = Catalog
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self.Category = Category
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self.SubCategory = SubCategory
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self.Product = Product
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def test_assigns_aggregates(self):
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catalog = self.catalog_factory()
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self.session.commit()
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self.session.refresh(catalog)
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assert catalog.product_count == 1
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def catalog_factory(self):
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product = self.Product()
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sub_category = self.SubCategory(
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products=[product]
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)
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category = self.Category(sub_categories=[sub_category])
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catalog = self.Catalog(categories=[category])
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self.session.add(catalog)
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return catalog
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def test_only_updates_affected_aggregates(self):
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catalog = self.catalog_factory()
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catalog2 = self.catalog_factory()
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self.session.commit()
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# force set catalog2 product_count to zero in order to check if it gets
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# updated when the other catalog's product count gets updated
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self.session.execute(
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'UPDATE catalog SET product_count = 0 WHERE id = %d'
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% catalog2.id
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)
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catalog.categories[0].sub_categories[0].products.append(
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self.Product()
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)
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self.session.commit()
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self.session.refresh(catalog)
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self.session.refresh(catalog2)
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assert catalog.product_count == 2
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assert catalog2.product_count == 0
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