rails 4 attr_accessible

Question

我正在尝试访问数据库并输入一些信息。它给了我一个错误，说“未定义的局部变量或方法`post_params‘用于#< PostsController:0x00000005aad728>”

我知道here已经回答了这个问题。但是我试着跟着他们做的事情，但是这不起作用，有人能帮我吗？

class PostsController < ApplicationController
  def index
     @post = Post.all     
  end

  def show
      @post = Post.find(params[:id])
  end

  def new
      @post = Post.new
  end

  def create
      @post = Post.new(post_params)

      if @post.save
          redirect_to posts_path, :notice => "Your post was saved"
      else
          render ="new"
      end

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

Answer 1

end for create方法包含private关键字和post_params方法。更新如下：

def create
      @post = Post.new(post_params)

      if @post.save
          redirect_to posts_path, :notice => "Your post was saved"
      else
          render ="new"
      end
end # Add end here

private
def post_params
     params.require(:post).permit(:title, :content)
end
end # Remove this end

Answer 2

在create方法中定义post_params方法。把它移开，一切都会正常的。