Sql Ruby-Change-Join-ON字段
我有一个运行Ruby的查询,我试图更改两个表连接的字段 我想进行如下查询:Sql Ruby-Change-Join-ON字段,sql,ruby-on-rails,ruby,join,Sql,Ruby On Rails,Ruby,Join,我有一个运行Ruby的查询,我试图更改两个表连接的字段 我想进行如下查询: Select * from Teamplayers join Liveplayers On Nid = Live_Player_id Ruby目前拥有的功能是: Teamplayer.joins(:liveplayer).where(:teamid => 1).all 这就提出了一个问题 Select * from Teamplayers join Live_players on Live_players.id
Select * from Teamplayers join Liveplayers On Nid = Live_Player_id
Ruby目前拥有的功能是:
Teamplayer.joins(:liveplayer).where(:teamid => 1).all
这就提出了一个问题
Select * from Teamplayers join Live_players on Live_players.id = Teamplayer.live_player_id
我的问题是id和live_player_id不是应该匹配的两个字段,它应该由Nid(来自live_player)和live_player_id(来自teamplayers)匹配
有人能帮我吗?这是一个关系问题还是一个错误的查询?您可以按如下方式指定连接:
Teamplayer.joins('LEFT JOIN Live_players ON Live_players.Nid = Teamplayers.live_player_id')
但是您的表名让我很困惑,我不知道我是否使用了专有名称/大小写…,因为它生成的查询是
Select*from teamplayers from teamplayers from teamplayers Live\u players on Nid=Live\u player\u id
,您可以看到它缺少join@user3240928我的回答有用吗?