警告：无法为受保护的属性进行质量分配

Question

需要建议

我正在使用rails 4和ruby 1.9.3

我正在尝试在管理员上创建帖子，并对标题和内容的存在进行验证。但是当我创建帖子时，验证错误会引发，即使我填写标题和内容。

这是我的代码

post.rb

class Post < ActiveRecord::Base
  validates :title, :presence => true
  validates :content, :presence => true
  validates :user_id, :presence => true
  ...

posts_controller.rb

module Admin
  class PostsController < ::ApplicationController
    layout 'admin'
    before_action :set_post, only: [:show, :edit, :update, :destroy, :publish, :unpublish]

   def new
    @post = Post.new
   end

   def create
     @post = Post.new(post_params)
     @post.user = current_user

     respond_to do |format|
       if @post.save
         format.html { redirect_to admin_post_path(@post), notice: 'Post was successfully created.' }
         format.json { render action: 'show', status: :created, location: @post }
       else
         format.html { render action: 'new' }
         format.json { render json: @post.errors, status: :unprocessable_entity }
       end
     end
   end

   private
   # Use callbacks to share common setup or constraints between actions.
   def set_post
     @post = Post.friendly.find(params[:id])
   end

   # Never trust parameters from the scary internet, only allow the white list through.
   def post_params
     params.require(:post).permit(:title, :content, :published)
   end
  end
end

并在我的日志中引发警告：无法为Post：title，content。

大量分配受保护的属性

感谢的