无法为UsersController找到“创建”操作

Question

我想从UsersController提取新的并创建动作到RegistrationsControllers（我刚刚制作），不幸的是出了点问题。

这是我的代码：

registrations_controller.rb：

class RegistrationsController < ApplicationController
  def new
    @user = User.new
  end

  def create
    if current_user.is_admin
      @user = User.new(admin_user_params)
    else
      @user = User.new(user_params)
    end

    respond_to do |format|
      if @user.save
        format.html { redirect_to @user, notice: 'Stworzono nowego użytkownika.' }
        format.json { render :show, status: :created, location: @user }
      else
        format.html { render :new }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end
end

users_controller.rb：

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy]
  skip_before_action :require_login, only: [:new, :create]

  def index
    if current_user.is_admin
      @users = User.all
    else
      redirect_to root_path
    end
  end

  def update
    respond_to do |format|
      if current_user.is_admin ? @user.update(admin_user_params) : @user.update(user_params)
        format.html { redirect_to @user, notice: 'Zaktualizowano dane dt. użytkownika.' }
        format.json { render :show, status: :ok, location: @user }
      else
        format.html { render :edit }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end
end

routes.rb中：

root :to => 'registration#index'
resources :user_sessions, only: [:create]

get 'login' => 'user_sessions#new', :as => :login
post 'logout' => 'user_sessions#destroy', :as => :logout

resources :tasks
resources :registrations

resources :projects do
get "search", on: :collection
resources :tasks
end

resources :users do
resources :tasks
end