267 lines
8.5 KiB
Python
267 lines
8.5 KiB
Python
import sqlalchemy as sa
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from sqlalchemy_utils.relationships import chained_join
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from tests import TestCase
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class TestChainedJoinForManyToManyToManyToMany(TestCase):
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dns = 'postgres://postgres@localhost/sqlalchemy_utils_test'
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create_tables = False
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def create_models(self):
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catalog_category = sa.Table(
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'catalog_category',
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self.Base.metadata,
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sa.Column('catalog_id', sa.Integer, sa.ForeignKey('catalog.id')),
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sa.Column('category_id', sa.Integer, sa.ForeignKey('category.id'))
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)
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category_subcategory = sa.Table(
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'category_subcategory',
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self.Base.metadata,
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sa.Column(
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'category_id',
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sa.Integer,
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sa.ForeignKey('category.id')
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),
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sa.Column(
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'subcategory_id',
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sa.Integer,
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sa.ForeignKey('sub_category.id')
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)
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)
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subcategory_product = sa.Table(
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'subcategory_product',
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self.Base.metadata,
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sa.Column(
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'subcategory_id',
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sa.Integer,
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sa.ForeignKey('sub_category.id')
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),
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sa.Column(
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'product_id',
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sa.Integer,
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sa.ForeignKey('product.id')
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)
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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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categories = sa.orm.relationship(
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'Category',
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backref='catalogs',
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secondary=catalog_category
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)
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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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sub_categories = sa.orm.relationship(
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'SubCategory',
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backref='categories',
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secondary=category_subcategory
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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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products = sa.orm.relationship(
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'Product',
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backref='sub_categories',
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secondary=subcategory_product
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)
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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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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_simple_join(self):
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assert str(chained_join(self.Catalog.categories)) == (
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'catalog_category JOIN category ON '
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'category.id = catalog_category.category_id'
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)
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def test_two_relations(self):
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sql = chained_join(
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self.Catalog.categories,
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self.Category.sub_categories
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)
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assert str(sql) == (
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'catalog_category JOIN category ON category.id = '
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'catalog_category.category_id JOIN category_subcategory ON '
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'category.id = category_subcategory.category_id JOIN sub_category '
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'ON sub_category.id = category_subcategory.subcategory_id'
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)
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def test_three_relations(self):
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sql = chained_join(
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self.Catalog.categories,
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self.Category.sub_categories,
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self.SubCategory.products
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)
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assert str(sql) == (
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'catalog_category JOIN category ON category.id = '
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'catalog_category.category_id JOIN category_subcategory ON '
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'category.id = category_subcategory.category_id JOIN sub_category '
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'ON sub_category.id = category_subcategory.subcategory_id JOIN '
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'subcategory_product ON sub_category.id = '
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'subcategory_product.subcategory_id JOIN product ON product.id = '
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'subcategory_product.product_id'
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)
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class TestChainedJoinFor3LevelDeepOneToMany(TestCase):
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dns = 'postgres://postgres@localhost/sqlalchemy_utils_test'
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create_tables = False
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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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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(
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'Product',
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backref='sub_category'
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)
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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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def __repr__(self):
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return '<Product id=%r>' % self.id
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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_simple_join(self):
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assert str(chained_join(self.Catalog.categories)) == 'category'
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def test_two_relations(self):
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sql = chained_join(
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self.Catalog.categories,
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self.Category.sub_categories
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)
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assert str(sql) == (
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'category JOIN sub_category ON category.id = '
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'sub_category.category_id'
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)
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def test_three_relations(self):
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sql = chained_join(
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self.Catalog.categories,
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self.Category.sub_categories,
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self.SubCategory.products
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)
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assert str(sql) == (
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'category JOIN sub_category ON category.id = '
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'sub_category.category_id JOIN product ON sub_category.id = '
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'product.sub_category_id'
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)
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class TestChainedJoinForOneToOneToOneToOne(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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category = sa.orm.relationship(
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'Category',
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uselist=False,
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backref='catalog'
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)
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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_category = sa.orm.relationship(
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'SubCategory',
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uselist=False,
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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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product = sa.orm.relationship(
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'Product',
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uselist=False,
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backref='sub_category'
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)
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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.Integer)
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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_simple_join(self):
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assert str(chained_join(self.Catalog.category)) == 'category'
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def test_two_relations(self):
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sql = chained_join(
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self.Catalog.category,
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self.Category.sub_category
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)
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assert str(sql) == (
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'category JOIN sub_category ON category.id = '
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'sub_category.category_id'
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)
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def test_three_relations(self):
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sql = chained_join(
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self.Catalog.category,
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self.Category.sub_category,
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self.SubCategory.product
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)
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assert str(sql) == (
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'category JOIN sub_category ON category.id = '
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'sub_category.category_id JOIN product ON sub_category.id = '
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'product.sub_category_id'
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)
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