Ruby on Rails display image as checkboxes in a form -

i'm having trouble can't display images options select form. want create photo album , @ same time select photos add album.

i tried "collection_check_boxes" can't existing images display options. , haven't tried create (save) yet.

i have associations. i'm using paperclip gem image.

models:

class album < activerecord::base   belongs_to :user   has_many :photos end  class photo < activerecord::base   belongs_to :owner, class_name: 'user'   belongs_to :album   has_attached_file :image, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png"   validates_attachment_content_type :image, content_type: /\aimage\/.*\z/ end 

controller:

class albumscontroller < applicationcontroller   before_action :authenticate_user!, only: [:create, :new]    def index     @albums = current_user.albums   end    def new     @photos = current_user.photos.all     @album = album.new   end    def create     @album = albums.new(album_params)     if @album.save       redirect_to user_album_path(@album)     else       redirect_to root_path     end   end    def show     @album = album.find(params[:id])   end    def add_photo   end    private     def album_params       params.require(:album).permit(:name)     end end 

views:

 <%= form_for @album, url: user_albums_path |f| %>     <form>       <div class="field">         <%= f.label :name %><br />         <%= f.text_field :name %>       </div>        ####################tried didn't work because image isn't text_method       <div>         <%= collection_check_boxes(:albums, :photo_ids, current_user.photos.all, :id, image_went_here) %>       </div>       ####################       <div class="actions">         <%= f.submit "create" %>       </div>     </form>    <% end %> 

collection_check_boxes(:albums, :photo_ids,                         current_user.photos.all, :id, :id) |b|     b.label(class: "check_box") {       b.check_box(class: "check_box") + image_tag(object.image.url)     } end 

where object given block representing photo in current_user.photos.all. may need change object.photo.url reference match photo model. see examples of giving collection_check_boxes block in documentation.