在此form_tag
方案中使用时,我不确定如何显示表单的错误消息。我的代码允许我在表单上一次创建5个产品,但不幸的是只发出“发生错误......”的通知。
这是我的代码:
Product.rb
class Product < ActiveRecord::Base
attr_accessible :price, :name, :purchase_date, :product_store, :in_category
belongs_to :user
belongs_to :store
attr_reader :product_store
validates_inclusion_of :in_category, :in => [true, false]
validates_presence_of :name, :price, :store_id, :user_id
validates_numericality_of :price
def product_store=(id)
self.store_id = id
end
end
Products_controller.rb
class ProductsController < ApplicationController
def new
@products = Array.new(5) { Product.new }
end
def create_multiple
@products = current_user.products.create(params[:products].map { |_k, p| p.merge params[:product] })
if @products.each(&:save)
redirect_to :back, :notice => "Success!"
else
redirect_to :back, :notice => "An error occured, please try again."
end
end
end
Form.html.erb
<%= form_tag create_multiple_products_path, :method => :post do %>
<%= error_messages_for @product %>
# the :purchase_date and :in_category are merged into all 5 Products.
<%= date_select("product", "purchase_date") %>
<%= label_tag :in_category, 'Add to Category?' %>
<%= radio_button("product", :in_category, 1) %>
<%= radio_button("product", :in_category, 0) %>
<% @products.each_with_index do |product, index| %>
<%= fields_for "products[#{index}]", product do |p| %>
<%= render "fields", :f => p %>
<% end %>
<% end %>
<%= submit_tag "Done" %>
<% end %>
他们的2个问题。 1.获取fields_for
以外字段的验证以显示.2。然后是fields_for
内的那些。我怎么能这样做?
谢谢。
答案 0 :(得分:7)
我一直在努力做同样的事情:
<% @products.each_with_index do |product, index| %>
<% product.errors.full_messages.each do |value| %>
<li><%= value %></li>
<% end %>
但是,这仅显示第一个产品出错的错误。您提交它,如果有后续产品有错误,您将被发送回该页面,下一个有错误的产品会显示其错误等。
编辑:知道了。这与我的验证方式有关。而不是:if @products.all?(&:valid?)
这样做:
@products.each(&:valid?) # run the validations
if @products.all? { |t| t.errors.empty? }