ActiveRecord :: StatementInvalid未知列错误

Question

为什么这样可行：

Tag.create(game_id: 1, tagged: u)

但是这个：

tags = Tag.where(game_id: 1, tagged: u).includes(:tagged)

给出错误：

ActiveRecord::StatementInvalid: Mysql2::Error: Unknown column 'tags.tagged' in 'where clause': SELECT `tags`.* FROM `tags`  WHERE `tags`.`game_id` = 1 AND `tags`.`tagged` = 1

BTW，u是ActiveRecord::Base sublcass。

Tag表格结构：

create_table :tags, force: true do |t|
    t.references :game
    t.references :tagged_by
    t.references :tagged
    t.timestamps
end

Answer 1

尝试

tags = Tag.includes(:tagged).where(game_id: 1, tagged_id: u.id)