如果找不到记录,Rails如何重定向

Question

如果找不到记录,我正在尝试重定向.该页面不是重定向,我得到错误记录未找到.

我的控制器:

def index
@link = Link.find(params[:id])
respond_to do |format|
    if @link.blank?
    format.html { redirect_to(root_url, :notice => 'Record not found') }
    else
    format.html { render :action => "index" }
    end
end
end

Answer 1

我一直在做的是把这个放在方法的最后:

rescue ActiveRecord::RecordNotFound
  redirect_to root_url, :flash => { :error => "Record not found." }

更好的是,将它作为控制器的around_filter:

around_filter :catch_not_found

private

def catch_not_found
  yield
rescue ActiveRecord::RecordNotFound
  redirect_to root_url, :flash => { :error => "Record not found." }
end

Answer 2

错误是由Link.find生成的 - 如果找不到对象,它会引发异常

你可以简化你的代码:

def index
  @link = Link.find_by_id(params[:id])

  redirect_to(root_url, :notice => 'Record not found') unless @link

  respond_to do |format|
    format.html
  end
end