Mysql Sequelize关联：在JSON响应中包含实体

我有三张表：视频剪辑、播放列表和视频剪辑播放列表地图

• Videoclips表的主键是int id，字符串是videoId
• VideoclipPlaylist映射的外键为PlayID，指向播放列表表中的id；外键为videoclipId，指向videoclips表中的videoId

我想返回一个包含所有播放列表的JSON，并为每个播放列表返回一个包含视频剪辑的数组

我不知道如何进行续集关联来实现这一点

let Videoclip = sequelize.define('videoclip',{
    title: Sequelize.STRING,
    videoId: Sequelize.STRING,
    thumbnail: Sequelize.STRING,
    channelTitle: Sequelize.STRING,
    duration: Sequelize.DOUBLE,
    viewCount: Sequelize.INTEGER
});

let Playlist = sequelize.define('playlist', {
    name: Sequelize.STRING,
    userId: Sequelize.INTEGER,
    tagList: Sequelize.STRING
});

let VideoclipPlaylistMap = sequelize.define('videoclipPlaylistMap', {
    videoclipId: Sequelize.STRING,
    playlistId: Sequelize.INTEGER
});

User.hasMany(Playlist, {foreignKey: 'userId'});
Playlist.belongsTo(User, {foreignKey: 'userId'});
Playlist.hasMany(VideoclipPlaylistMap, {foreignKey: 'playlistId'});
VideoclipPlaylistMap.belongsTo(Videoclip, {foreignKey: 'videoclipId'});

现在，它正在执行此连接：

LEFT OUTER JOIN `videoclips` AS `videoclipPlaylistMaps.videoclip` ON `videoclipPlaylistMaps`.`videoclipId` = `videoclipPlaylistMaps.videoclip`.`id`

---

而不是

videoclipPlaylistMaps.videoclip

id

它应该转到

videoclipPlaylistMaps.videoclip

videoId
您需要告诉Sequelize使用videoId字段作为关系的目标键。默认情况下，在belongsTo关联中，模型的主键用作目标键。您需要在关联中使用targetKey选项

    VideoclipPlaylistMap.belongsTo(Videoclip, { foreignKey: 'videoclipId', targetKey: 'videoId' });