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je suivant les modèles et les associations:Supprimer tout dans un grand nombre de many de table secondaire dans sqlalchemy
class CartProductsAssociation(db.Model):
__tablename__ = 'cart_products_association'
cart_id = db.Column(db.Integer, db.ForeignKey('carts.id',ondelete='CASCADE'),primary_key=True)
product_id = db.Column(db.Integer, db.ForeignKey('products.id',ondelete='CASCADE'), primary_key=True)
quantity = db.Column(db.Integer)
product = db.relationship("Product", backref="cart_associations", cascade="all,delete",passive_deletes=True)
cart = db.relationship("Cart", backref="product_associations",cascade="all,delete",passive_deletes=True)
class Product(db.Model):
__tablename__ = 'products'
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String)
img_path = db.Column(db.String)
price = db.Column(db.Float, default=0.0)
product_categories = db.relationship(
"ProductCategory",
secondary=product_product_categories,
back_populates="products")
carts = db.relationship("Product", secondary="cart_products_association",passive_deletes=True,cascade="all,delete")
class Cart(db.Model):
__tablename__ = 'carts'
id = db.Column(db.Integer, primary_key=True)
branch_id = db.Column(db.Integer, db.ForeignKey('branch.id'))
branch = db.relationship("Branch", back_populates="carts")
page_id = db.Column(db.Integer, db.ForeignKey('pages.id'))
page = db.relationship("Page", back_populates="carts")
shopper_id = db.Column(db.String, db.ForeignKey('shoppers.fb_user_id'))
shopper = db.relationship(
"Shopper",
back_populates="carts")
products = db.relationship("Product", secondary="cart_products_association")
cart_status = db.Column(db.Enum('user_unconfirmed','user_confirmed','client_unconfirmed','client_confirmed', name='cart_status'), default='user_unconfirmed')
Quand je suis en train de supprimer un produit que je obtiens l'erreur suivante: AssertionError
AssertionError: Dependency rule tried to blank-out primary key column 'cart_products_association.cart_id' on instance '<CartProductsAssociation at 0x7f5fd41721d0>'
Comment puis-je le résoudre?
double possible de [règle de dépendance a essayé de hachurer clé primaire dans SQLAlchemy, lorsque la contrainte de clé étrangère fait partie de la clé primaire composite] (https://stackoverflow.com/ questions/23699651/dependency-rule-essayé-de-effacer-clé-primaire-dans-sqlalchemy-when-foreign-key-c) –