rails 3质量分配错误，简单却无法解决

Question

我一直在试图弄清楚为什么当我的代码似乎是正确的时候，我总是收到质量分配错误。我使用错误的语法吗？我真的很感激任何测试版，我一直在试图调试我的应用程序的这样一个简单的部分，它真的停止了我的进度。我有以下几点：

控制器

class ProductsController < ApplicationController 
def new 
     @product =Product.new 
end 

def create 
     @product = Product.new(params[:product]) 
end 

end 

车型

class Product < ActiveRecord::Base 
    attr_accessible :name, :colors_attributes 
    has_many :colors 
    accepts_nested_attributes_for :colors, allow_destroy: true 
end 

class Color < ActiveRecord::Base 
     attr_accessible :name, :product_id 
     belongs_to :product 
end 

迁移

class CreateProducts < ActiveRecord::Migration 
    def change 
    create_table :products do |t| 
     t.string :name 

     t.timestamps 
    end 
    end 
end 

class CreateColors < ActiveRecord::Migration 
    def change 
    create_table :colors do |t| 
     t.integer :product_id 
     t.string :name 

     t.timestamps 
    end 
    end 
end 

查看

产品/ new.html.erb

<%= render "form" %> 

产品/ _form.html.erb

<%= form_for @product do |f| %> 
     <%= f.text_field :name %> 
     <%= f.fields_for :color do |c| %> 
       <%= render 'color_fields', f: c %> 
     <% end %> 
     <%= f.button :submit %> 
<% end %> 

产品/ _color_fields.html.erb

<%= f.text_field :name %> 

错误：

ActiveModel::MassAssignmentSecurity::Error in ProductsController#create 

Can't mass-assign protected attributes: color 

完全跟踪：

activemodel (3.2.3) lib/active_model/mass_assignment_security/sanitizer.rb:48:in `process_removed_attributes' 
activemodel (3.2.3) lib/active_model/mass_assignment_security/sanitizer.rb:20:in `debug_protected_attribute_removal' 
activemodel (3.2.3) lib/active_model/mass_assignment_security/sanitizer.rb:12:in `sanitize' 
activemodel (3.2.3) lib/active_model/mass_assignment_security.rb:230:in `sanitize_for_mass_assignment' 
activerecord (3.2.3) lib/active_record/attribute_assignment.rb:75:in `assign_attributes' 
activerecord (3.2.3) lib/active_record/base.rb:498:in `initialize' 
app/controllers/products_controller.rb:7:in `new' 
app/controllers/products_controller.rb:7:in `create' 
actionpack (3.2.3) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (3.2.3) lib/abstract_controller/base.rb:167:in `process_action' 
... 

任何见解将不胜感激

Answer 1

我相信这是你想要的

<%= form_for @product do |f| %> 
    <%= f.text_field :name %> 
    <%= f.fields_for :colors do |c| %> 
    <%= render 'color_fields', f: c %> 
    <% end %> 
    <%= f.button :submit %> 
<% end %> 

你fields_for使用:color代替:colors