Nested form using paperclip

Question

I have a model called posts, and it has many attachments.

The attachments model is using paperclip.

I made a standalone model for creating attachments which

Answer 1

You are missing the :multipart option in your form definition:

<% @attachment = @post.attachments.build %>
<%= form_for @post, :html => { :multipart => true } do |f| %>
  <% if @post.errors.any? %>
    

      
<%= pluralize(@post.errors.count, "error") %> prohibited this post from being saved:

      

      <% @post.errors.full_messages.each do |msg| %>
        
<%= msg %>
      <% end %>
      
    
  <% end %>

  

    <%= f.label :name %>

    <%= f.text_field :name %>
  
  

    <%= f.label :description %>

    <%= f.text_area :description %>
  
  

    <%= f.fields_for :attachments, @attachment do |at_form| %>

      <%= at_form.file_field :pclip %>

    <% end %>
  

  

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

Also, your @posts variable should really be @post (single ActiveRecord instance as opposed to an array of ActiveRecord instances).