RoR未定义方法'attr_accessor'

Question

I am building a blog that allows me to post pictures, and when a new post w/ a picture comes up, I get an error saying "require attr_accessor for 'image_file_name'". So I put my "attr_accessor :image" in there and I get an "undefined method error 'attr_accessor'". https://github.com/BBaughn1/savagelysaving <-- the github if you need it

def create
    @post = Post.new(post_params)
    if @post.save
      redirect_to @post
    else
      render 'new'
    end
  end

This is before the error,

def create
    attr_accessor :image
    @post = Post.new(post_params)
    if @post.save
      redirect_to @post
    else
      render 'new'
    end
  end

and this is after the error. And, I got this error earlier but fixed it with this:

def update
    @post = Post.find(params[:id])
    attr_accessor :image
    if @post.update(params[:post].permit(:title, :body, :image))
      redirect_to @post
    else
      render 'edit'
    end
  end

putting "attr_accessor :image" before the "@post = Post.new(post_params)" will give me the same error saying that I require "attr_accessor"

Answer 1

It looks like this is simply a naming mismatch. Your schema shows you have the attributes avatar_file_name, avatar_content_type, avatar_file_size, and avatar_updated_at. But in your model , you have has_attached_file :image . These two items should match up . it sounds like you probably want has_attached_file :avatar , instead. You will need to replace other relevant occurrences of "image" with "avatar" in your views and controllers, as well. You also should remove the attr_accessor :image from your model. Your error indicates that the required fields do not exist in the database, for the structure you have defined.