序列化插入行多对多关系

Question

我是使用 Node.js 进行 Sequelize 的新手。我试图将数据插入到我的多对多关系中。根据文档，我们在创建主对象后可以使用 set[modelName] 函数。然而，对我来说情况似乎并非如此。如果有人能指出我正确的方向，我将不胜感激。干杯！

我的学生模型：

const Sequelize = require('sequelize');
const sequelize = require('../db/database');

const Students = sequelize.define('student', {
    studentId: {
        type: Sequelize.INTEGER,
        autoIncrement: true,
        allowNull: false,
        primaryKey: true
    },

    firstName: {
        type: Sequelize.STRING,
        allowNull: false
    },
    middleName: {
        type: Sequelize.STRING,
        allowNull: true
    },
    lastName: {
        type: Sequelize.STRING,
        allowNull: false
    },
    dateOfBirth: {
        type: Sequelize.STRING,
        allowNull: false
    },
    gender: {
        type: Sequelize.STRING,
        allowNull: false
    },
    email: {
        type: Sequelize.STRING,
        allowNull: true
    },
    phoneNumber: {
        type: Sequelize.STRING,
        allowNull: true
    }
});

module.exports = Students;

我的联系方式：

const Sequelize = require('sequelize');
const sequelize = require('../db/database');

const Contacts = sequelize.define('contact', {
    contactId: {
        type: Sequelize.INTEGER,
        autoIncrement: true,
        allowNull: false,
        primaryKey: true
    },
    firstName: {
        type: Sequelize.STRING,
        allowNull: false
    },
    middleName: {
        type: Sequelize.STRING,
        allowNull: true
    },
    lastName: {
        type: Sequelize.STRING,
        allowNull: false
    },
    dateOfBirth: {
        type: Sequelize.STRING,
        allowNull: false
    },
    gender: {
        type: Sequelize.STRING,
        allowNull: false
    },
    email: {
        type: Sequelize.STRING,
        allowNull: true
    },
    phoneNumber: {
        type: Sequelize.STRING,
        allowNull: true
    }
});

module.exports = Contacts;

我的亲戚：

Student.belongsToMany(Contact, {
    through: 'StudentContacts',
    timestamps: false
});

Contact.belongsToMany(Student, {
    through: 'StudentContacts',
    timestamps: false
});

我的数据库图：

我保存对象的代码

student = new Student({
            firstName,
            middleName,
            lastName,
            dateOfBirth,
            gender,
            email,
            phoneNumber,
            classId,
            tenantId: req.user.tid
        });

        // create student
        const newStudent = await student.save();
        newStudent
            .setContact({
                firstName: contact.firstName,
                lastName: contact.lastName,
                middleName: contact.middleName,
                dateOfBirth: contact.dateOfBirth,
                gender: contact.gender,
                email: contact.email,
                phoneNumber: contact.phoneNumber
            })
            .save();
        console.log('student', newStudent);

我的邮递员创建：

更新了代码以反映建议的答案

Student.create(
            {
                firstName,
                middleName,
                lastName,
                dateOfBirth,
                gender,
                email,
                phoneNumber,
                classId,
                tenantId: req.user.tid,
                contact: [
                    {
                        firstName: contact.firstName,
                        lastName: contact.lastName,
                        middleName: contact.middleName,
                        dateOfBirth: contact.dateOfBirth,
                        gender: contact.gender,
                        email: contact.email,
                        phoneNumber: contact.phoneNumber
                    }
                ]
            },
            {
                include: [Contact]
            }
        );

Answer 1

我们来介绍一下将一个产品与多个标签关联起来的能力。设置模型可能如下所示：

class Tag extends Model {}
Tag.init({
  name: Sequelize.STRING
}, { sequelize, modelName: 'tag' });

Product.hasMany(Tag);
// Also works for `belongsToMany`.
Now we can create a product with multiple tags in the following way:

代码使用示例

Product.create({
  id: 1,
  title: 'Chair',
  tags: [
    { name: 'Alpha'},
    { name: 'Beta'}
  ]
}, {
  include: [ Tag ]
})

这个例子是关于 hasMany 的，但它对于belongsToMany 来说是一样的

Answer 2

对于多对多关系 - add[modelName] 有效。

例如，如果模型名称为

user

，则方法将为

addUser

。