NoMethodError例外：未定義的方法`order_item」爲＃<訂單：0x00000009dd52a8>

我有三個型號，Order, order_item和food_item 的order has_many order_items和order_item has_many food_itemsNoMethodError例外：未定義的方法`order_item」爲＃<訂單：0x00000009dd52a8>

當我從order_controller API創建一個新的訂單我收到下面的錯誤，我不知道什麼是錯的。

NoMethodError Exception: undefined method `order_item' for #<Order:0x00000009dd52a8>

orders_controller.rb

class Api::V1::OrdersController < Api::V1::ApplicationController 
protect_from_forgery with: :null_session 

skip_before_filter :verify_authenticity_token, :if => Proc.new {|c| c.request.format.json? } 
before_action :fetch_restaurent 
before_action :fetch_food_items, :only => [:index] 

after_action :send_order_to_kitchen, :only => [:create, :update] 



    def index 
    @orders = Restaurant.orders.fetch_items_from_ethor 
    end 

    def show 
    # Display the list of food_items available from the restaurant 
    # Allow the customer to place an order 
    end 

    def create 
    debugger 
     @order = Order.new(order_params) 
     if @order.save 
      render :json, order, status:201, location: [:api, current_customer, order] 
     else 
      render :json, { errors: order.errors }, status:422 
     end 
    end 

    # once the order is placed just send it to the kitechn() 
    def update 
    @order = Order.find_by(params[:id]) 
    @rder.update_attributes(order_params) 
    if @order.save 
     render :json, order, status: 201, location: [:api, current_user.order.id] 
    else 
     render :json,{errors: order.errors}, status: 422 
    end 
    end 


private 
    def order_params 
    params.require(:order).permit(:customer_id, :order_id, :pos_id, :table_id, :order_number, 
      :order_status,:order_date, :food_item_ids) 
    end 
end

order.rb＃模型文件

Order類<的ActiveRecord :: Base的

belongs_to的：客戶 belongs_to的：餐廳 belongs_to的：表 has_many：order_items has_many：foo d_items，通過：ORDER_ITEMS

驗證：CUSTOMER_ID，：ORDER_NUMBER，存在：真驗證：小計，：final_total，存在：真，numericality：{GREATER_THAN_OR_EQUAL_TO：0}

order_item.rb＃模型

class OrderItem < ActiveRecord::Base 

    belongs_to :food_item, inverse_of: :order_items 
    belongs_to :order, inverse_of: :order_items 
    belongs_to :restaurant 
    has_many :food_items 
end

food_item.rb＃模型

class FoodItem < ActiveRecord::Base 

    belongs_to :restaurant 
    belongs_to :order, inverse_of: :food_items 
    belongs_to :order_item, inverse_of: :food_items 
    has_many :categories_food_items 
    has_many :categories, through: :categories_food_items 
end

我不明白，從那裏尋求order_item。請幫我理解解決這個問題。

undefined method `order_item' for #<Order:0x00000009dd52a8>

我的堆棧跟蹤：

Started POST "/api/v1/orders?access_token=testing&order[customer_id]=1&order[order_number]=101&order[pos_id]=222&order[table_id]=1&order[order_status]=pending&order[order_date]=02/03/2015" for 127.0.0.1 at 2015-06-22 14:39:30 +0530 
    ActiveRecord::SchemaMigration Load (0.1ms) SELECT `schema_migrations`.* FROM `schema_migrations` 
Processing by Api::V1::OrdersController#create as JSON 
    Parameters: {"access_token"=>"testing", "order"=>{"customer_id"=>"1", "order_number"=>"101", "pos_id"=>"222", "table_id"=>"1", "order_status"=>"pending", "order_date"=>"02/03/2015"}} 
    ApiKey Load (0.1ms) SELECT `api_keys`.* FROM `api_keys` WHERE `api_keys`.`access_token` = 'testing' LIMIT 1 
    Restaurant Load (0.1ms) SELECT `restaurants`.* FROM `restaurants` WHERE `restaurants`.`id` IS NULL LIMIT 1 
Completed 500 Internal Server Error in 35ms 
** [Airbrake] Notice was not sent due to configuration:   
    Environment Monitored? false   
    API key set? true 

NoMethodError - undefined method `order_items' for #<Class:0x0000000a70f0f8>: 
    activerecord (4.1.8) lib/active_record/dynamic_matchers.rb:26:in `method_missing' 
    app/controllers/api/v1/orders_controller.rb:24:in `create' 
    actionpack (4.1.8) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
    actionpack (4.1.8) lib/abstract_controller/base.rb:189:in `process_action' 
    actionpack (4.1.8) lib/action_controller/metal/rendering.rb:10:in `process_action' 
    actionpack (4.1.8) lib/abstract_controller/callbacks.rb:20:in `block in process_action' 
    activesupport (4.1.8) lib/active_support/callbacks.rb:113:in `call' 
    activesupport (4.1.8) lib/active_support/callbacks.rb:215:in `block in halting_and_conditional' 
    activesupport (4.1.8) lib/active_support/callbacks.rb:149:in `block in halting_and_conditional' 
    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 `block in halting' 
    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 `block in halting' 
    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 `block in halting' 
    activesupport (4.1.8) lib/active_support/callbacks.rb:166:in `block in halting' 
    activesupport (4.1.8) lib/active_support/callbacks.rb:149:in `block in halting_and_conditional' 
    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' 
    searchkick (0.8.7) lib/searchkick/logging.rb:107: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 `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 `call' 
    actionpack (4.1.8) lib/action_dispatch/routing/route_set.rb:678:in `call' 
    xray-rails (0.1.16) lib/xray/middleware.rb:37:in `call' 
    omniauth (1.2.2) lib/omniauth/strategy.rb:186:in `call!' 
    omniauth (1.2.2) lib/omniauth/strategy.rb:164: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 `call' 
    rack (1.5.3) lib/rack/etag.rb:23:in `call' 
    rack (1.5.3) lib/rack/conditionalget.rb:35:in `call' 
    rack (1.5.3) lib/rack/head.rb:11:in `call' 
    remotipart (1.2.1) lib/remotipart/middleware.rb:27: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 (1.5.3) lib/rack/session/abstract/id.rb:225:in `context' 
    rack (1.5.3) 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' 
    airbrake (4.2.0) lib/airbrake/rails/middleware.rb:13:in `call' 
    better_errors (2.1.1) lib/better_errors/middleware.rb:84:in `protected_app_call' 
    better_errors (2.1.1) lib/better_errors/middleware.rb:79:in `better_errors_call' 
    better_errors (2.1.1) lib/better_errors/middleware.rb:57: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' 
    quiet_assets (1.1.0) lib/quiet_assets.rb:27:in `call_with_quiet_assets' 
    actionpack (4.1.8) lib/action_dispatch/middleware/request_id.rb:21:in `call' 
    rack (1.5.3) lib/rack/methodoverride.rb:21:in `call' 
    rack (1.5.3) lib/rack/runtime.rb:17:in `call' 
    activesupport (4.1.8) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call' 
    rack (1.5.3) lib/rack/lock.rb:17:in `call' 
    actionpack (4.1.8) lib/action_dispatch/middleware/static.rb:84:in `call' 
    rack (1.5.3) lib/rack/sendfile.rb:112:in `call' 
    airbrake (4.2.0) lib/airbrake/user_informer.rb:16:in `_call' 
    airbrake (4.2.0) lib/airbrake/user_informer.rb:12: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 (1.5.3) lib/rack/content_length.rb:14:in `call' 
    thin (1.5.1) lib/thin/connection.rb:81:in `block in pre_process' 
    thin (1.5.1) lib/thin/connection.rb:79:in `pre_process' 
    thin (1.5.1) lib/thin/connection.rb:54:in `process' 
    thin (1.5.1) lib/thin/connection.rb:39:in `receive_data' 
    eventmachine (1.0.5) lib/eventmachine.rb:187:in `run' 
    thin (1.5.1) lib/thin/backends/base.rb:63:in `start' 
    thin (1.5.1) lib/thin/server.rb:159:in `start' 
    rack (1.5.3) lib/rack/handler/thin.rb:16:in `run' 
    rack (1.5.3) lib/rack/server.rb:264:in `start' 
    railties (4.1.8) lib/rails/commands/server.rb:69:in `start' 
    railties (4.1.8) lib/rails/commands/commands_tasks.rb:81:in `block in server' 
    railties (4.1.8) lib/rails/commands/commands_tasks.rb:76:in `server' 
    railties (4.1.8) lib/rails/commands/commands_tasks.rb:40:in `run_command!' 
    railties (4.1.8) lib/rails/commands.rb:17:in `<top (required)>' 
    bin/rails:4:in `<main>'

來源

2015-06-22 user5035102

請更新您的文章與完整的錯誤stacktrace。 – Pavan

在更新方法中，您有'@ rder'，這是否是預期的？ –

你有order_params和裏面有order_id和order_number ...那裏它看起來更像是一個has_one order_item的行爲...也許你想檢查你的參數，並看看你是否允許所有正確的參數。 – user934801

我想通了爲什麼跟它undefined method order_item」的＃`

我其實驗證順序模型內部的order_item。哪些不應該。

改變我的訂單模型如下（刪除order_item的驗證）後，問題得到解決。

class Order < ActiveRecord::Base 

    belongs_to :customer 
    belongs_to :restaurant 
    belongs_to :table 
    has_many :order_items 
    has_many :food_items, through: :order_items 

    validates :customer_id, :order_number, presence:true 
    validates :subtotal, :final_total, presence:true, numericality:{ greater_than_or_equal_to:0 }

來源

2015-06-22 09:33:12 user5035102

NoMethodError例外：未定義的方法`order_item」爲＃<訂單：0x00000009dd52a8>

回答

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