Rails-驗證錯誤消息未出現

Question

我在Rails4應用程序中遇到驗證錯誤消息的問題。 他們不會以某種方式出現。 當他們觸發時，僅顯示“請檢查以下問題”消息，僅此而已，沒有錯誤消息。

order.rb =>

Class Order < ActiveRecord::Base
  ....
  attr_accessor :card_number, :card_verification
  validate :validate_card, :on => :create

  private

  def validate_card
    unless credit_card.valid?
      credit_card.errors.full_messages.each do |message|
        errors.add(:base, message)
      end
    end
  end
end

orders_controller.rb =>

def create
  @order = Order.new(order_params)
  @order.ip_address = request.remote_ip
  @order.user_id = current_user.id

  respond_to do |format|
    if @order.save
      if @order.purchase
        format.html { render action: "success", notice: 'Perfect!' }
      else
        format.html { render action: "failure" }
      end
    else
      format.html { render action: 'new' }
    end
  end
end

/orders/new.html.rb =>

<%= simple_form_for(@order, html:{class: "well"}, :method => :post) do |f| %>
<%= f.error_notification %>
  <%= f.input :participation_id, collection: Participation.where(user_id: current_user.id), as: :select, label_method: lambda{|x| x.examination.name}, label: 'Choose' %>
  <%= f.input :first_name, label: 'Name' %>
  <%= f.input :last_name, label: 'Surname' %>
  .........
  <%= f.button :submit %>
<% end %>

我的代碼有什么問題？

提前致謝。

Answer 1

試試這個>>>

 Class Order < ActiveRecord::Base
      ....
      attr_accessor :card_number, :card_verification
      validate :validate_card, :on => :create

      private

      def validate_card
        unless credit_card.valid?           
            errors.add(:credit_card,  "your message")           
        end
      end
 end

Answer 2

你可以試試看 一次將產生一個錯誤

<% if @order.errors.full_messages.any? %>
  <% @order.errors.full_messages.each do |error_message| %>
    <%= error_message if @order.errors.full_messages.first == error_message %> <br />
  <% end %>
<% end %>

Answer 3

請看例子

class Invoice < ActiveRecord::Base
  validate :active_customer, on: :create
 
  def active_customer
    errors.add(:customer_id, "is not active") unless customer.active?
  end
end

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