在Sequelize中查询关联表-Java 学习之路

我有两个表（ users 和 games ）通过关联表（ game_players ）连接，创建了多对多关系：

models.Game.belongsToMany(models.User, { through: models.GamePlayer, as: 'players' });
models.User.belongsToMany(models.Game, { through: models.GamePlayer, foreignKey: 'user_id' });

除了外键 user_id 和 game_id 之外， game_players 还有一些额外的列用于特定于链接的数据：

sequelize.define('game_player', {
    isReady: {
        defaultValue: false,
        type: Sequelize.BOOLEAN,
        field: 'is_ready'
    },
    isDisabled: {
        defaultValue: false,
        type: Sequelize.BOOLEAN,
        field: 'is_disabled'
    },
    powerPreferences: {
        type: Sequelize.TEXT,
        field: 'power_preferences'
    },
    power: {
        type: Sequelize.STRING(2),
        defaultValue: '?'
    }
}, {
    underscored: true
});

假设我想要一个游戏，并急切地加载活跃的玩家 . 这是我的第一次努力：

db.models.Game.findAll({
    include: [{
        model: db.models.User,
        as: 'players',
        where: { 'game_player.isDisabled': false }
    }]
}).nodeify(cb);

这会生成以下SQL，它会抛出错误 Column players.game_player.isDisabled does not exist ：

SELECT "game"."id", 
   "game"."name", 
   "game"."description", 
   "game"."variant", 
   "game"."status", 
   "game"."move_clock"                       AS "moveClock", 
   "game"."retreat_clock"                    AS "retreatClock", 
   "game"."adjust_clock"                     AS "adjustClock", 
   "game"."max_players"                      AS "maxPlayers", 
   "game"."created_at", 
   "game"."updated_at", 
   "game"."gm_id", 
   "game"."current_phase_id", 
   "players"."id"                            AS "players.id", 
   "players"."email"                         AS "players.email", 
   "players"."temp_email"                    AS "players.tempEmail", 
   "players"."password"                      AS "players.password", 
   "players"."password_salt"                 AS "players.passwordSalt", 
   "players"."action_count"                  AS "players.actionCount", 
   "players"."failed_action_count"           AS "players.failedActionCount", 
   "players"."created_at"                    AS "players.created_at", 
   "players"."updated_at"                    AS "players.updated_at", 
   "players.game_player"."is_ready"          AS 
   "players.game_player.isReady", 
   "players.game_player"."is_disabled"       AS 
   "players.game_player.isDisabled", 
   "players.game_player"."power_preferences" AS 
   "players.game_player.powerPreferences", 
   "players.game_player"."power"             AS "players.game_player.power", 
   "players.game_player"."created_at"        AS 
   "players.game_player.created_at", 
   "players.game_player"."updated_at"        AS 
   "players.game_player.updated_at", 
   "players.game_player"."game_id"           AS 
   "players.game_player.game_id", 
   "players.game_player"."user_id"           AS 
   "players.game_player.user_id" 
FROM   "games" AS "game" 
   INNER JOIN ("game_players" AS "players.game_player" 
               INNER JOIN "users" AS "players" 
                       ON "players"."id" = "players.game_player"."user_id") 
           ON "game"."id" = "players.game_player"."game_id" 
              AND "players"."game_player.isdisabled" = false;

很明显，Sequelize用不正确的引号包装我的约束别名：'players' . 'game_player.isdisabled'应该是'players.game_player'.isdisabled . 如何修改上面的Sequelize代码以正确查询此列？

2 回答

1
我得到了它，但只能通过手动浏览存储库的已关闭的票据然后来到#4880 .

使用无法使用的连接表列的子句可以包装在 $ 中 . 老实说，我没有看到任何文件 . 修改我上面的查询实现了我想要的：
```
db.models.Game.findAll({
    include: [{
        model: db.models.User,
        as: 'players',
        where: { '$players.game_player.is_disabled$': false }
    }]
}).nodeify(cb);
```
回复于 2024-05-13T07:48:48+08:00

您的查询应该在具有'where'条件的连接表上，然后您应该使用'include'子句来包含其他两个模型，如下所示：

db.models.GamePlayer.findAll({
        where: {isDisabled: false},
        attributes: [],
        include: [models.User, models.Game]
    }).then(function(result){
        ....
    });

回复于 2024-05-13T07:48:48+08:00

在Sequelize中查询关联表

2 回答

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