brands-in-shops feature implemented

backend/models.py

@@ -17,6 +17,19 @@ shopping_event_products = Table(
     Column('price', Float, nullable=False)  # Price of this product at the time of this shopping event
 )
 
+class BrandInShop(Base):
+    __tablename__ = "brands_in_shops"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    shop_id = Column(Integer, ForeignKey("shops.id"), nullable=False)
+    brand_id = Column(Integer, ForeignKey("brands.id"), nullable=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    # Relationships
+    shop = relationship("Shop", back_populates="brands_in_shop")
+    brand = relationship("Brand", back_populates="shops_with_brand")
+
 class Brand(Base):
     __tablename__ = "brands"
     
@@ -27,6 +40,7 @@ class Brand(Base):
     
     # Relationships
     products = relationship("Product", back_populates="brand")
+    shops_with_brand = relationship("BrandInShop", back_populates="brand")
 
 class GroceryCategory(Base):
     __tablename__ = "grocery_categories"
@@ -82,6 +96,7 @@ class Shop(Base):
     
     # Relationships
     shopping_events = relationship("ShoppingEvent", back_populates="shop")
+    brands_in_shop = relationship("BrandInShop", back_populates="shop")
 
 class ShoppingEvent(Base):
     __tablename__ = "shopping_events"