ruby-on-rails - 未定义的方法 `authenticate_user! Devise/Rails 4 中的 Api::PostsController

Question

我的项目中有以下路线:

  root 'home#index'

  namespace :api, defaults: { format: :json } do
    devise_for :users, controllers: { sessions: "api/sessions" }
    resources :posts
  end

用户模型:

class User < ActiveRecord::Base
    has_many :posts,        dependent: :destroy
    has_many :comments, dependent: :destroy

    validates :name, presence: true

    devise :database_authenticatable, :rememberable
end

session Controller :

class Api::SessionsController < Devise::SessionsController
  def create
    @user = User.find_for_database_authentication(email: params[:user][:email])
    if @user && @user.valid_password?(params[:user][:password])
        sign_in(@user)
    else
        warden.custom_failure!
      @errors = [ 'Invalid email or password' ]
        render 'api/shared/errors', status: :unauthorized
    end
    end
end

应用 Controller :

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  #protect_from_forgery with: :exception
end

最后我的 Post Controller :

class Api::PostsController < ApplicationController
    before_action :authenticate_user!, only: [ :create ]

    def create
      current_user.posts.create!(post_params)
    end

    private

        def post_params
            params.require(:post).permit(:title, :content)
        end
end

但是当我尝试创建一个新帖子时，我收到以下错误:“未定义的方法 `authenticate_user!Api::PostsController”。如果我删除它，我会收到关于“current_user”方法的错误。有什么问题？我该如何解决？提前致谢!!!

Answer 1

由于 :api 中的嵌套设计，您会收到该错误您的 routes.rb 中的命名空间文件。因此，您应该通过以下方式对用户进行身份验证:

class Api::PostsController < ApplicationController
    before_action :authenticate_api_user!, only: [ :create ]
end