undefined method `image_url' for #<ImagesController:0x000000025ff6c0> on line 10 Solved: needed "resources images" in routes.

images_controller.rb

class ImagesController < ApplicationController
    respond_to :json

    def create
        @image = Image.new
        @image.user_id = params[:user_id]
        @image.upload = params[:upload]
        @image.save!

        puts @image.upload.url

        respond_with @image
    end
end