Question

在我的Rails 5应用程序中，我从查询中收到此错误，但我不知道如何修复它。

PG::SyntaxError: ERROR: subquery has too many columns

我的控制器：

def index
  @canvases = current_user.get_voted Canvas
  @activities = PublicActivity::Activity.order("created_at desc").where(owner_id: current_user.friend_ids, owner_type: "User").or(PublicActivity::Activity.order("created_at desc").where(recipient_id: current_user.id)).or(PublicActivity::Activity.order("created_at desc").where("key = ? AND recipient_id in (?)", "canvas_product.create", @canvases)).paginate page: params[:page], per_page: 30
end

错误在此查询中的某处：

(PublicActivity::Activity.order("created_at desc").where("key = ? AND recipient_id in (?)", "canvas_product.create", @canvases))

Answer 1

看起来@canvases是一组实际的画布，也许Rails并没有正确地将它们解释为ID ...

您可以将其转换为这样的ID：

where("key = ? AND recipient_id in (?)", "canvas_product.create", @canvases.map(&:id))

或者，您可以在关联上使用pluck来选择您需要的ID，例如：

@canvas_ids = current_user.get_voted(Canvas).pluck(:id)

（虽然这取决于get_voted的编写方式）

Rails - PG :: SyntaxError：错误：子查询有太多列

1 个答案: