Sequelize - 根据特定属性包含答案

【问题标题】：Sequelize - Include based on specific attributeSequelize - 根据特定属性包含
【发布时间】：2021-03-05 09:15:39
【问题描述】：

我有一个模型定义如下：

sequelize.define('game', {
    id: {
        type: type.INTEGER,
        primaryKey: true,
        autoIncrement: true,
    },
    leaderId: {
        type: type.INTEGER,
        allowNull: false,
        references: {
            model: 'users',
            key: 'id',
        },
    },
    playerId: {
        type: type.INTEGER,
        allowNull: false,
        references: {
            model: 'users',
            key: 'id',
        },
    },
    status: {
        type: type.STRING,
        defaultValue: 'running',
    },
    notes: {
        type: type.TEXT,
    },
});

我正在尝试使用 Sequelize 加载所有 game 对象并包含 ID 等于 playerId 字段的 User。

问题是我有两个属性（leaderId、playerId）引用User 模型，所以使用include 如下不起作用：

Game.findAll({
    where: conditions,
    include: [{ model: User }],
})

有没有办法指定include 命令应该使用哪个属性？

【问题讨论】：

标签： javascript sql node.js postgresql sequelize.js

【解决方案1】：

const game = sequelize.define('game', {
    id: {
        type: type.INTEGER,
        primaryKey: true,
        autoIncrement: true,
    },
    leaderId: {
        type: type.INTEGER,
        allowNull: false,
        references: {
            model: 'users',
            key: 'id',
        },
    },
    playerId: {
        type: type.INTEGER,
        allowNull: false,
        references: {
            model: 'users',
            key: 'id',
        },
        as:'player'
    },
    status: {
        type: type.STRING,
        defaultValue: 'running',
    },
    notes: {
        type: type.TEXT,
    },
});

game.associate = function (models) {
   game.belongsTo(models.user, {
      foreignKey: "playerId",
      as: "player",
   });

   game.belongsTo(models.user, {
      foreignKey: "leaderId",
      as: "leader",
   });
};

Game.findAll({
    where: conditions,
    include: ['player'],
})

Or

Game.findAll({
    where: conditions,
    include: [{model: User, as: 'player' }],
})

Or

Game.findAll({
    where: conditions,
    include: [{model: User, as: 'player', foreignKey: 'playerId' }],
})

https://github.com/nkhs/node-sequelize

【讨论】：