显示模型基础错误在创建rails 3视图3

我有一个窗体，用户可以订阅最新优惠券。当我打开同一商店链接在多个选项卡和订阅，我得到多个订阅单个商店导致数据重复并发送相同邮件多次。所以添加验证模型。所以问题是我如何得到错误显示在视图中。当用户已订阅store.Since创建一个ajax请求..我已经粘贴的代码下方。任何帮助，将不胜感激谢谢显示模型基础错误在创建rails 3视图3

_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"

用户控制器

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)

末

型号

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

末

create.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 %>

来源

2012-10-11 shiva

在你create.js.erb文件，

<% if @coupon_subscription.errors.present? %> 
    $("#id").html(@coupon_subscription.errors.full_messages); 
<% end %>

来源

2012-10-13 17:37:13

显示模型基础错误在创建rails 3视图3

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