不能用「XXX_params」創建，雖然PARAMS可

Question

我對Ruby的更新上Rails.I有一個問題如下： 我的Rails環境ruby2.0.0，導軌4.1.1

1，首先，這裏是我的精力控制器：

class EnergiesController < ApplicationController 
     before_action :all_energies, only: [:index, :create, :update, :destroy] 
     before_action :set_energies, only: [:edit, :update, :destroy] 
     respond_to :html, :js 
    ........ 
    def create 
     puts "in create method" 
     @energy = Energy.create(energy_params) 
     puts "create method end" 
    end 
    ....... 
    private 
    ....... 
    def energy_params 
     puts "in get_params method" 
     params.require(:energy).permit(:title, :capacity, :generation, :power_category, :location, :longitude, :latitude, :energy_role) 
     puts params 
     puts "get_params method end" 
    end 
end 

2，我的日誌輸出是：

Started POST "/energies" for 127.0.0.1 at 2014-08-29 18:44:25 +0800 
    Processing by EnergiesController#create as JS     
    Parameters{"utf8"=>"✓","authenticity_token"=>"rliBtHNMG/7PvivOE3WT4Z2K0MY/d9WnUYRFu04imNk=", "energy"=>{"title"=>"qwe", "capacity"=>"1", "generation"=>"12", "power_category"=>"12", "location"=>"12", "longitude"=>"12", "latitude"=>"123", "energy_role"=>"13"}, "commit"=>"Create Energy"} 
    in get_all method 
    get_all method end 
    **in create method** 
    **in get_params method** 
    {"utf8"=>"✓", "authenticity_token"=>"rliBtHNMG/7PvivOE3WT4Z2K0MY/d9WnUYRFu04imNk=", "energy"=>{"title"=>"qwe", "capacity"=>"1", "generation"=>"12", "power_category"=>"12", "location"=>"12", "longitude"=>"12", "latitude"=>"123", "energy_role"=>"13"}, "commit"=>"Create Energy", "action"=>"create", "controller"=>"energies"} 
    **get_params method end** 
    (0.1ms) begin transaction 
    SQL (0.4ms) INSERT INTO "energies" ("created_at", "updated_at") VALUES (?, ?) [["created_at", "2014-08-29 10:44:25.440007"], ["updated_at", "2014-08-29 10:44:25.440007"]] 
    (171.5ms) commit transaction 
    **create method end** 
    in create_js file 
    Energy Load (0.3ms) SELECT "energies".* FROM "energies" 
    Rendered energies/_energy.html.erb (4.2ms) 
    Rendered energies/create.js.erb (11.4ms) 
    Completed 200 OK in 195ms (Views: 17.9ms | ActiveRecord: 172.4ms) 

，你可以看到，該方法get_param貌似正常運行，但是當代碼 「@energy = Energy.create（energy_params）」運行，它將被轉換爲SQL： 「SQL（0.4ms）INSERT INTO」energies「（」created_at「，」updated_at「）VALUES（？ ？）[[「created_at」，「2014-08-29 10：44：25.440007」]，[「updated_at」，「2014-08-29 10:44:25.440007」]]「

實際上，它起初跑起來好了，但我不知道爲什麼突然不起作用。非常感謝你的幫助。

Answer 1

def energy_params 
    puts "in get_params method" 
    params.require(:energy).permit(:title, :capacity, :generation, :power_category, :location, :longitude, :latitude, :energy_role) 
    puts params 
    puts "get_params method end" 
end 

刪除所有不必要的行。 Ruby方法返回它上一次執行的行返回的值 - 在這種情況下，它始終爲零（從puts返回的值）。

def energy_params 
    params.require(:energy).permit(:title, :capacity, :generation, :power_category, :location, :longitude, :latitude, :energy_role) 
end