Hello,
I need your help with one query, I want to get Category items that some
Product's of some Brand have.
I try DBSession.query(Category).filter(Category.overviews.any(Brand.slug ==
brand_slug)).order_by(Category.name)
But it doesn't work as expected because there is no relation between Brand
and other tables
class Brand(Base):
__tablename__ = 'brand'
id = Column(Integer, primary_key=True)
name = Column(UnicodeText, nullable=False)
slug = Column(UnicodeText, nullable=False, unique=True)
class Category(Base):
__tablename__ = 'category'
id = Column(Integer, primary_key=True)
name = Column(UnicodeText, nullable=False)
class Product(Base):
__tablename__ = 'product'
id = Column(Integer, primary_key=True)
brand_id = Column(Integer, ForeignKey('brand.id'), nullable=False)
name = Column(UnicodeText, nullable=False)
brand = relationship('Brand', backref='products')
categories = relationship('Category', backref='products',
secondary=product_category) # many-to-many relationship
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