Not able to get url from uploaded image, undefined method `url' error on has_many associated model

``` undefined method `url' for #<GalleryPhoto:0x007f80c05a4ba8> 10: <%= @gallery.date %> 11: </p> 12: 13: <%= @gallery.gallery_photos.first.url %> 14: 15: 16: <%= link_to 'Edit', edit_gallery_path(@gallery) %> ``` I am attempting to create a photo album system in a rails app where albums are created and images are uploaded to it via paperclip. I am unable to get the .url method to work on my show page to display the image. The way it is set up is like this: Gallery Model (has many gallery_photos) GalleryPhotos Model(belongs_to gallery) gallery show: ``` <p id="notice"><%= notice %></p> <p> <b>Gallery name:</b> <%= @gallery.gallery_name %> </p> <p> <b>Date:</b> <%= @gallery.date %> </p> <%= @gallery.gallery_photos.first.url %> <%= link_to 'Edit', edit_gallery_path(@gallery) %> | <%= link_to 'Back', galleries_path %> ``` gallery model ``` class Gallery < ActiveRecord::Base attr_accessible :date, :gallery_name, :gallery_photos_attributes has_many :gallery_photos, :dependent => :destroy accepts_nested_attributes_for :gallery_photos end ``` gallery_photo model ``` class GalleryPhoto < ActiveRecord::Base attr_accessible :photo, :caption, :date, :gallery_id belongs_to :gallery has_attached_file :photo,:styles => { :large => "300x300<", :medium => "300x300>", :thumb => "100x100>" }, :default_url => "/images/:style/missing.png" end ``` Gallery controller ``` def new @gallery = Gallery.new @gallery.gallery_photos.build # added this end def show @gallery = Gallery.find(params[:id]) end def create @gallery = Gallery.new(params[:gallery]) respond_to do |format| if @gallery.save! format.html { redirect_to @gallery, notice: 'Gallery was successfully created.' } format.json { render json: @gallery, status: :created, location: @gallery } else format.html { render action: "new" } format.json { render json: @gallery.errors, status: :unprocessable_entity } end end end ``` The table is mysql, and I am running this through a vagrant virtual system. It is inserting on new, and it is making it. On new it is inserting data into the table for the galleries and for gallery_photos. No matter what I do, I cannot get a url out of it.