Question

I have been using rails for about a month, mostly loving it, sometimes infuriating (I haven’t yet gotten particularly efficient at debugging through the magic).

I have a gallery page that extends from a something called simply page. Each gallery page has many gallery images.

class Gallery < Page
  belongs_to :page, :dependent => :destroy
  has_many :gallery_images, :dependent => :destroy
  accepts_nested_attributes_for :gallery_images
end

class GalleryImage < ActiveRecord::Base
  has_attached_file :image, :styles => { :medium => "600x600>", :thumb => "100x100>" }
  belongs_to :gallery
end

I am trying to edit the gallery through the pages controller.

  def edit
    @page = Gallery.find(params[:id])
    @house = @page.house
  end

Through the page/edit.html.erb i render the gallery form partial

<%= form_for @page do |f| %>
  <p><b>Images</b></p>
    <% for image in @page.gallery_images %>
        <%= image.image.url(:thumb) %>
    <% end %>

  <%= f.fields_for :gallery_images do |builder| %>
    <% render :partial => "galleries/gallery_image_fields", :f => builder %>
  <% end %>

  <p><%= f.submit %></p>
<% end %>

In galleries/gallery_image_fields i have

<p class="fields">
  <%= f.label :image %><br />
  <%= f.file_field :image %>
</p>

Now the urls for the above image print out so it seems that the relashionship is working fine, however I get the enormously frustrating error message.

undefined local variable or method `f’ for #<#:0x210eb34>
Showing mypathblahblah/app/views/galleries/_gallery_image_fields.html.erb where line #2 raised:

If anyone has a solution that would obviously be perfect otherwise some thoughts into how one might debug this problem would be great too. I tried outputting debug builder but it didnt really help me.

Thanks

Answer 1

Try changing:

<% render :partial => "galleries/gallery_image_fields", :f => builder %>

into:

<% render :partial => "galleries/gallery_image_fields", :locals => { :f => builder } %>