ruby-on-rails – 在Rails中抢救

我正在与下列作品合作;

def index
  @user = User.find(params[:id]) 
  rescue
    flash[:notice] = "ERROR"
    redirect_to(:action => 'index')
  else 
    flash[:notice] = "OK"
    redirect_to(:action => 'index')
end

现在我要么是否有正确的ID,我总是在我看来“OK”,我做错了什么？

当我在DB中没有ID以显示“错误”时,我需要.我也试图使用救援ActiveRecord :: RecordNotFound但是一样的事情.

所有的帮助是赞赏.

解决方法

在救援块结束后的所有代码仅在救援模块中没有返回时被解释.所以你可以在你的救援行动结束时打电话给你.

def index
  begin
    @user = User.find(params[:id]) 
  rescue
    flash[:notice] = "ERROR"
    redirect_to(:action => 'index')
    return
  end
  flash[:notice] = "OK"
  redirect_to(:action => 'index')
end

要么

def index
  @user = User.find(params[:id]) 
  # after is interpret only if no exception before
  flash[:notice] = "OK"
  redirect_to(:action => 'index')
rescue
  flash[:notice] = "ERROR"
  redirect_to(:action => 'index')
end

但在你的情况下,使用rescue_from或rescue_in_public更好

喜欢

class UserController < ApplicationController
  def rescue_in_public(exception)
    flash[:notice] = "ERROR"
    redirect_to(:action => 'index')
  end

  def index
    @user = User.find(params[:id]) 
    flash[:notice] = "OK"
    redirect_to(:action => 'index')
  end
end

但是,使用rescue_in_public并不是很好的建议