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我有用户可以订阅最新优惠券的表格。当我在多个选项卡中打开同一个商店链接并订阅时，我会为单个商店获得多个订阅，导致数据重复并多次发送相同的邮件。所以在模型上添加了验证。所以问题是我如何让错误显示在视图中。当用户已经订阅了商店时。由于创建正在发出 ajax 请求。我已经粘贴了下面的代码。任何帮助将不胜感激谢谢

_index.html.haml（视图）

=form_for([@merchant,@coupon_subscription],:remote => true,:html => { :class => "store_subscribe" } ) do |f|
    %h3 subscribe for #{@merchant.merchant_name} coupons 
-if !logged_in?
  =f.text_field :user ,:class => "input_text email"
=f.submit "Subscribe",:disable_with => "Subscribing...",:class => "store_subscribe subscribe_button"

订阅控制器

def create                                                            #creates subscription 
return if !logged_in?
return if current_user.subscription_limit?
@merchant=Merchant.find_by_permalink(params[:merchant_id])
@coupon_subcription=CouponSubscription.new(:merchant_id => @merchant.id,:user => current_user)
@coupon_subcription.coupon_subscribe
respond_to do |format|
  if @coupon_subcription.save!
    format.html { redirect_to(:back, :notice => 'Success.') }  
    format.js
  else
    format.html { redirect_to(:back, :notice => @coupon_subcription.errors.full_messages || "Oops something went wrong")}  
    format.js 

  end
end
UserMailer.delay.coupon_subscription(current_user,@coupon_subcription)

结尾

模型

validate :validate_subscription ,:on => :create

private 
def validate_subscription
@coupon_subscribed=CouponSubscription.find_by_user_id_and_merchant_id_and_active(self.user_id,self.merchant_id,true)
if @coupon_subscribed
   self.errors.add(:base , 'You have already subscribed.')
end

结尾

创建.js

<% if !logged_in? %>
$(".store_subscribe").remove()
$(".subscription_feedback").show().append("Login!")
<% else %>
$(".store_subscribe").remove()
$(".store_subscribe").show().append("<h3>Thanks for subscription .We have send you a   mail </h3>")
<% end %>
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1 回答 1

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在您的 create.js.erb 文件中，

<% if @coupon_subscription.errors.present? %>
  $("#id").html(@coupon_subscription.errors.full_messages);
<% end %>
于 2012-10-13T17:37:13.960 回答