ForbiddenAttributesError錯誤的collection_select has_many通過關聯

Question

我有一個表單，其中我必須選擇配置文件，然後是子類別，然後是產品名稱如下。

<div class="wrapper wrapper-content animated fadeInRight"> 

    <div class="col-md-6 col-md-offset-2"> 
     <h2>Create New Product</h2> 
     <%= form_for @product, url: {action: "create"} do |f| %> 
     <% @product.errors.full_messages.each do |msg| %> 
      <p class="alert alert-danger"><%= msg %></p> 
     <% end %> 

     <%= f.label :profiles, "Profile" %> 

     <%= f.collection_select(:profiles, Profile.all, :id, :name, {include_blank: '- Please Select -'}, {:class=>'form-control',:required => true, :title => 'Please Select Profile or Create a new Profile'})%> 

     <%= f.label :sub_categories, "Sub Category" %> 
     <%= f.collection_select(:sub_categories, SubCategory.all, :id, :name, {include_blank: '- Please Select -'}, {:class=>'form-control',:required => true, :title => 'Please Select Profile or Create a new Profile'})%> 

     <%= f.text_field :name, :class=>"form-control", :placeholder => "Product Name", :required => "true" %> 

     <%= f.submit "Create", :class=>"btn btn-primary" ,:title => "New Product", "data-confirm" => "Do you really want to create?"%> 
     <% end %> 
    </div> 
</div> 

它發送PARAMS如下

{"utf8"=>"✓", 
"authenticity_token"=>"aQN2cZCOMdesKEJmZN3Ddw7woPtZTIWrgoph+LOkGoA=", 
"product"=>{"profiles"=>"1", 
"sub_categories"=>"3", 
"name"=>"Gel"}, 
"commit"=>"Create"} 

因此，我已經宣佈在產品控制器的強參數如下：

def products_params 
    params.require(:product).permit(:id, :name, :profiles, :sub_categories) 
    end 

產品型號

class Product < ActiveRecord::Base 
    has_many :profile_products 
    has_many :profiles , through: :profile_products 

    has_many :profile_products 
    has_many :sub_categories , through: :profile_products 

end 

資料模型

class Profile < ActiveRecord::Base 
     has_many :profile_products 
     has_many :products , through: :profile_products 

    end 

子類別型號

class SubCategory < ActiveRecord::Base 

    has_many :profile_products 
    has_many :profiles , through: :profile_products 

    has_many :profile_products 
    has_many :products , through: :profile_products 

end 

簡介產品型號

class ProfileProduct < ActiveRecord::Base 
    belongs_to :profile 
    belongs_to :product 
    belongs_to :sub_category 
end 

我知道錯誤是具有較強的參數，但我對如何處理它混淆。可以有些人指出我正確的方向。

錯誤

activemodel (4.1.8) lib/active_model/forbidden_attributes_protection.rb:21:in `sanitize_for_mass_assignment' 
activerecord (4.1.8) lib/active_record/attribute_assignment.rb:24:in `assign_attributes' 
activerecord (4.1.8) lib/active_record/core.rb:453:in `init_attributes' 
activerecord (4.1.8) lib/active_record/core.rb:196:in `initialize' 
activerecord (4.1.8) lib/active_record/inheritance.rb:30:in `new' 
activerecord (4.1.8) lib/active_record/inheritance.rb:30:in `new' 
cancancan (1.9.2) lib/cancan/controller_resource.rb:85:in `build_resource' 
cancancan (1.9.2) lib/cancan/controller_resource.rb:66:in `load_resource_instance' 
cancancan (1.9.2) lib/cancan/controller_resource.rb:32:in `load_resource' 
cancancan (1.9.2) lib/cancan/controller_resource.rb:25:in `load_and_authorize_resource' 
cancancan (1.9.2) lib/cancan/controller_resource.rb:10:in `block in add_before_filter' 
activesupport (4.1.8) lib/active_support/callbacks.rb:440:in `instance_exec' 
activesupport (4.1.8) lib/active_support/callbacks.rb:440:in `block in make_lambda' 
activesupport (4.1.8) lib/active_support/callbacks.rb:160:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:160:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:229:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:229:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:229:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:229:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.8) lib/active_support/callbacks.rb:86:in `call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:86:in `run_callbacks' 
actionpack (4.1.8) lib/abstract_controller/callbacks.rb:19:in `process_action' 
actionpack (4.1.8) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (4.1.8) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' 
activesupport (4.1.8) lib/active_support/notifications.rb:159:in `block in instrument' 
activesupport (4.1.8) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.1.8) lib/active_support/notifications.rb:159:in `instrument' 
actionpack (4.1.8) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
actionpack (4.1.8) lib/action_controller/metal/params_wrapper.rb:250:in `process_action' 
activerecord (4.1.8) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (4.1.8) lib/abstract_controller/base.rb:136:in `process' 
actionview (4.1.8) lib/action_view/rendering.rb:30:in `process' 
actionpack (4.1.8) lib/action_controller/metal.rb:196:in `dispatch' 
actionpack (4.1.8) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' 
actionpack (4.1.8) lib/action_controller/metal.rb:232:in `block in action' 
actionpack (4.1.8) lib/action_dispatch/routing/route_set.rb:82:in `call' 
actionpack (4.1.8) lib/action_dispatch/routing/route_set.rb:82:in `dispatch' 
actionpack (4.1.8) lib/action_dispatch/routing/route_set.rb:50:in `call' 
actionpack (4.1.8) lib/action_dispatch/journey/router.rb:73:in `block in call' 
actionpack (4.1.8) lib/action_dispatch/journey/router.rb:59:in `each' 
actionpack (4.1.8) lib/action_dispatch/journey/router.rb:59:in `call' 
actionpack (4.1.8) lib/action_dispatch/routing/route_set.rb:678:in `call' 
warden (1.2.3) lib/warden/manager.rb:35:in `block in call' 
warden (1.2.3) lib/warden/manager.rb:34:in `catch' 
warden (1.2.3) lib/warden/manager.rb:34:in `call' 
rack (1.5.2) lib/rack/etag.rb:23:in `call' 
rack (1.5.2) lib/rack/conditionalget.rb:35:in `call' 
rack (1.5.2) lib/rack/head.rb:11:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/params_parser.rb:27:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/flash.rb:254:in `call' 
rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context' 
rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/cookies.rb:560:in `call' 
activerecord (4.1.8) lib/active_record/query_cache.rb:36:in `call' 
activerecord (4.1.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call' 
activerecord (4.1.8) lib/active_record/migration.rb:380:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
activesupport (4.1.8) lib/active_support/callbacks.rb:82:in `run_callbacks' 
actionpack (4.1.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/reloader.rb:73:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
railties (4.1.8) lib/rails/rack/logger.rb:38:in `call_app' 
railties (4.1.8) lib/rails/rack/logger.rb:20:in `block in call' 
activesupport (4.1.8) lib/active_support/tagged_logging.rb:68:in `block in tagged' 
activesupport (4.1.8) lib/active_support/tagged_logging.rb:26:in `tagged' 
activesupport (4.1.8) lib/active_support/tagged_logging.rb:68:in `tagged' 
railties (4.1.8) lib/rails/rack/logger.rb:20:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/request_id.rb:21:in `call' 
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call' 
rack (1.5.2) lib/rack/runtime.rb:17:in `call' 
activesupport (4.1.8) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
actionpack (4.1.8) lib/action_dispatch/middleware/static.rb:84:in `call' 
rack (1.5.2) lib/rack/sendfile.rb:112:in `call' 
railties (4.1.8) lib/rails/engine.rb:514:in `call' 
railties (4.1.8) lib/rails/application.rb:144:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
rack (1.5.2) lib/rack/content_length.rb:14:in `call' 
rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service' 
/Users/arunbhat/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' 
/Users/arunbhat/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' 
/Users/arunbhat/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread 

Answer 1

#app/db/migrate/20150116071437_create_products.rb 
class CreateProducts < ActiveRecord::Migration 
    def change 
    create_table :products do |t| 
     t.string :name 
     t.string :brand 

     t.timestamps null: false 
    end 
    end 
end 
#app/db/migrate/20150116071503_create_profiles.rb 
class CreateProfiles < ActiveRecord::Migration 
    def change 
    create_table :profiles do |t| 
     t.string :name 

     t.timestamps null: false 
    end 
    end 
end 


#app/db/migrate/20150116071631_create_products_profiles.rb 
class CreateProductsProfiles < ActiveRecord::Migration 
    def change 
    create_table :products_profiles, id: false do |t| 
     t.belongs_to :product, index: true 
     t.belongs_to :profile, index: true 
    end 
    end 
end 


#product.rb 
class Product < ActiveRecord::Base 
    has_and_belongs_to_many :profiles 
end 

#profile.rb 
class Profile < ActiveRecord::Base 
    has_and_belongs_to_many :products 
end 


#app/controllers/products_controller.rb 
class ProductsController < ApplicationController 
    def new 
    @product = Product.new 
    end 

    def create 
    @product = Product.new(product_params) 

    #select your profile based on chosen params. 
    selected_profile = Profile.where(id: params["profiles"]).first 

    #now, assign them to the product. 
    @product.profiles << selected_profile 
    if @product.save 
     redirect_to products_path 
    else 
     render :new 
    end 
    end 

    private 
    def product_params 
    params.require(:product).permit(:name, :brand) 
    end 
end 


#app/views/products/_form.html.erb 
    <%= form_for(@product) do |f| %> 

    <div class="field"> 
    <%= f.label :name %><br> 
    <%= f.text_field :name %> 
    </div> 
    <div class="field"> 
    <%= f.label :brand %><br> 
    <%= f.text_field :brand %> 
    </div> 

    <div class="field"> 
    <%= label_tag :profile, 'Select a profile' %> 
    <%= select_tag(:profiles, 
    options_from_collection_for_select(Profile.all, :id, :name)) %> 
    </div> 

    <div class="actions"> 
    <%= f.submit %> 
    </div> 

<% end %> 

這顯示了關聯，模型，控制器&視圖代碼。（產物&資料關係）！同樣嘗試構建產品< - >子類別（多對多關聯）

檢查這個doc，這將幫助你:)

Answer 2

我會去嵌套屬性的途徑。你的形式將變爲

f.fields_for(:profiles) do |profile_form| 
    profile_form.collection_select(:id, Profile.all ...) 
end 

而且您的控制器將變爲params.permit(:profiles_attributes) 和你Product模型將需要accepts_nested_attributes_for :profiles

或者你可以只在Product模型中定義的訪問捕捉到它的視圖，並保存它手動：

attr_accessor :profile_id