Question

我正在和Postgres学习Sequelize。如何让“帖子”拥有多位作者？我目前每篇文章只有一位作者。我尝试使用Post.hasMany(Person)，但我无法弄清楚如何填写下面同步语句中的数据，因为我从教程中复制了它...这是我第一次使用数据库。

import Sequelize from 'sequelize';
import _ from 'lodash';
import Faker from 'faker';

const Conn = new Sequelize(
    'test_db',
    'postgres',
    'postgres',
    {
        dialect: 'postgres',
        host: 'localhost'
    }
);

const Person = Conn.define('person', {
    firstName: {
        type: Sequelize.STRING,
        allowNull: false
    },
    lastName: {
        type: Sequelize.STRING,
        allowNull: false
    }
});

const Post = Conn.define('post', {
    title: {
        type: Sequelize.STRING,
        allowNull: false
    },
    content: {
        type: Sequelize.STRING,
        allowNull: false        
    }
});

// Relationships 
Person.hasMany(Post);
Post.belongsTo(Person);

Conn.sync({ force: true }).then(() => {
    _.times(10, () => {
        return Person.create({
            firstName: Faker.name.firstName(),
            lastName: Faker.name.lastName()
        }).then(person => {
            return person.createPost({
                title: `Sample title by ${person.firstName}`,
                content: 'This is a sample article.'
            })          
        })
    });
});

export default Conn;

Answer 1

Try:

Post.belongsToMany(Person);

You can also specify more details about the M2M, if you wish to name the intermediary table for example:

            Post.belongsToMany(Person, {
                as: 'Authors',
                through: 'post_authors',
                foreignKey: 'id',
                otherKey: 'id'
            })

Sequelize嵌套关系，“帖子”有多个“作者”？

1 个答案: