77 lines
2.4 KiB
Python
77 lines
2.4 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 TestAggregateOneToManyAndManyToMany(TestCase):
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dns = 'postgres://postgres@localhost/sqlalchemy_utils_test'
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def create_models(self):
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product_categories = sa.Table(
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'category_product',
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self.Base.metadata,
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sa.Column('category_id', sa.Integer, sa.ForeignKey('category.id')),
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sa.Column('product_id', sa.Integer, sa.ForeignKey('product.id'))
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)
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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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name = sa.Column(sa.Unicode(255))
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@aggregated(
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'products.categories',
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sa.Column(sa.Integer, default=0)
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)
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def category_count(self):
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return sa.func.count(sa.distinct(Category.id))
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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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name = sa.Column(sa.Unicode(255))
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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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name = sa.Column(sa.Unicode(255))
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price = sa.Column(sa.Numeric)
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catalog_id = sa.Column(
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sa.Integer, sa.ForeignKey('catalog.id')
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)
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catalog = sa.orm.relationship(
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Catalog,
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backref='products'
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)
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categories = sa.orm.relationship(
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Category,
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backref='products',
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secondary=product_categories
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)
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self.Catalog = Catalog
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self.Category = Category
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self.Product = Product
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def test_insert(self):
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category = self.Category()
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products = [
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self.Product(categories=[category]),
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self.Product(categories=[category])
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]
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catalog = self.Catalog(products=products)
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self.session.add(catalog)
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products2 = [
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self.Product(categories=[category]),
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self.Product(categories=[category])
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]
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catalog2 = self.Catalog(products=products2)
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self.session.add(catalog)
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self.session.commit()
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assert catalog.category_count == 1
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assert catalog2.category_count == 1
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