如何在 Sequelize 中使用 belongsToMany 的 add 方法？

Question

我正在尝试将产品添加到我的购物车商品中 Table 使用 sequilize：
Product.belongsTo(用户, { constraints: true, onDelete: 'CASCADE' });
User.hasMany（产品）；
User.hasOne（购物车）；
Cart.belongsTo（用户）；
Cart.belongsTo许多（产品，{通过：CartItem}）；
Product.belongsTo许多（购物车，{通过：CartItem}）；

这是我的产品型号：


const Product = sequelize.define('product', {
    id: {
        type: Sequelize.STRING,
        allowNull: false,
        primaryKey: true,
    },
    title: {
        type: Sequelize.STRING,
        allowNull: false,
    },
    price: {
        type: Sequelize.INTEGER,
        allowNull: false,
    },
    imageURL: {
        type: Sequelize.STRING,
        allowNull: false,
    },
    description: {
        type: Sequelize.STRING,
        allowNull: false,
    },
});
module.exports = Product;

这是我的购物车型号：

const Cart = sequelize.define('cart', {
    id: {
        type: Sequelize.STRING,
        allowNull: false,
        primaryKey: true,
    },
});
module.exports = Cart;

这是我的用户模型：

const User = sequelize.define('user', {
    id: {
        type: Sequelize.STRING,
        allowNull: false,
        primaryKey: true,
    },
    fullName: {
        type: Sequelize.STRING,
        allowNull: false,
    },
    email: {
        type: Sequelize.STRING,
        allowNull: false,
    },
});
module.exports = User;

这是我的购物车商品型号：

const CarteItem = sequelize.define('carteItem', {
    id: {
        type: Sequelize.STRING,
        allowNull: false,
        primaryKey: true,
    },
    quantity: {
        type: Sequelize.INTEGER,
        allowNull: false,
    },
});
module.exports = CarteItem;

当我使用

Post 将产品添加到购物车时出现问题

exports.postCart = (req, res, next) => {
    const prodId = req.body.productId;
    let fetchedCart;
    let newQuantity = 1;
    req.user
        .getCart()
        .then((cart) => {
            fetchedCart = cart;
            return cart.getProducts({ where: { id: prodId } });
        })
        .then((products) => {
            let product;
            if (products > 0) product = products[0];
            return Product.findByPk(prodId);
        })
        .then((product) => {
            console.log(product);
            return fetchedCart.addProduct(product, {
                through: { quantity: newQuantity },
            });
        })
        .then(() => {
            res.redirect('/');
        })
        .catch((err) => console.log(err));
};

我收到这个错误

Executing (default): SELECT `id`, `quantity`, `createdAt`, `updatedAt`, `cartId`, `productId` FROM `carteItems` AS `carteItem` WHERE `carteItem`.`cartId` = '1' AND `carteItem`.`productId` IN ('7c64a81f-59d3-427d-af2a-f9c9ee6e4fde');
AggregateError
    at recursiveBulkCreate (/home/horus/Documents/WorkStation/learningPath/learningPathNode/node-complete-course/node_modules/sequelize/lib/model.js:2600:17)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async Function.bulkCreate (/home/horus/Documents/WorkStation/learningPath/learningPathNode/node-complete-course/node_modules/sequelize/lib/model.js:2837:12)
    at async Promise.all (index 0)
    at async BelongsToMany.add (/home/horus/Documents/WorkStation/learningPath/learningPathNode/node-complete-course/node_modules/sequelize/lib/associations/belongs-to-many.js:740:30) {
  errors: [
    BulkRecordError [SequelizeBulkRecordError]: notNull Violation: carteItem.id cannot be null
        at /home/horus/Documents/WorkStation/learningPath/learningPathNode/node-complete-course/node_modules/sequelize/lib/model.js:2594:25
        at processTicksAndRejections (node:internal/process/task_queues:96:5)
        at async Promise.all (index 0)
        at async recursiveBulkCreate (/home/horus/Documents/WorkStation/learningPath/learningPathNode/node-complete-course/node_modules/sequelize/lib/model.js:2590:9)
        at async Function.bulkCreate (/home/horus/Documents/WorkStation/learningPath/learningPathNode/node-complete-course/node_modules/sequelize/lib/model.js:2837:12)
        at async Promise.all (index 0)
        at async BelongsToMany.add (/home/horus/Documents/WorkStation/learningPath/learningPathNode/node-complete-course/node_modules/sequelize/lib/associations/belongs-to-many.js:740:30) {
      errors: [ValidationError],
      record: [carteItem]
    }
  ]
}

Answer 1

我的问题是使用了 CartItem Schema 的错误定义，应该是 autoIncremented

如何在 Sequelize 中使用 belongsToMany 的 add 方法？

How to use add Methods with belongsToMany in Sequelize?

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node.js

sequelize.js