如何使用Ransack与find_by_sql

Question

如何使用Ransack和＃34; find_by_sql＆＃34;？ 我通常这样做：

def index

  @m = Mymodel.ransack(params[:q])
  @mymodels = @m.result.page(params[:page]) 

end

我可以在进行自定义查询时使用Ransack吗？：

@mymodels = Mymodel.find_by_sql(["SELECT ... ", current_user])

Answer 1

如果我弄错了，这就是你想要的：

def index
  @m = Mymodel.ransack(params[:q])
  @mymodels = @m.result.page(param[:page]).where(user: current_user)
end

要直接回答您的问题，您可以将其转换为SQL字符串，但您不会（或者很难）能够使用current_user作为参数：

def index
  @m = Mymodel.ransack(params[:q])
  sql = @m.result.page(param[:page]).to_sql
  @mymodels = Mymodel.find_by_sql(sql, current_user)
  # the line just above won't work immediately because you'll need to
  # modify the `sql` variable manually by inserting the `?` that you'll
  # need to map that to the `current_user` that you passed as an argument
end