Paperclip multiple file upload

Question

I have three model:

 class Project < ActiveRecord::Base
  attr_accessible :name
  has_many :tickets, dependent: :delete_all
 end

 class Ticket < ActiveRecord::Base
  belongs_to :project
  attr_accessible :description, :title,:asset  
  has_many :assets
  accepts_nested_attributes_for :assets
end

class Asset < ActiveRecord::Base
  attr_accessible :title, :body
  belongs_to :ticket
  has_attached_file :asset
end

_form:

<%= form_for([@project,@ticket], html: { multipart: true }) do |f| %>
<p>
    <%= f.label :title %>
    <%= f.text_field :title %>
</p>
<p>
    <%= f.label :description %>
    <%= f.text_area :description %>
</p>

<% number = 0 %>
<%= f.fields_for :assets do |asset| %>
    <p>
        <%= asset.label "File ##{number +=1}" %>
        <%= asset.file_field :asset %>
    </p>
<% end %>
<%= f.submit %>
<% end %>

TicketsController:

def new
 @ticket = @project.tickets.build
 3.times { @ticket.assets.build }
end

The problem is when I try to create new ticket for a project it shows ActiveRecord::UnknownAttributeError at /projects/1/tickets/new unknown attribute: ticket_id @ticket= id: nil, title: nil, description: nil, project_id: 1, created_at: nil, updated_at: nil, user_id: nil

From error message I can see that tickets "id" is nil(it's not yet created), so assets don't have ticket_id, so how do I get around it?

This kind of nested form is a feature of nested_form gem. Are you including it on your Gemfile? — João Daniel
– João Daniel, Commented Mar 18, 2013 at 21:52
nested_form gem is not essential here since he is building assets manually on the action file. — Rubyrider
– Rubyrider, Commented Mar 19, 2013 at 7:50

Rubyrider · Accepted Answer · 2013-03-19 07:45:48Z

1

attr_accessible :ticket_id

You need to add this field as attr accessible on its model.

For nested attribuetes you also need to add project_assets as attr_accessibl/ attr_accessor

attr_accessible :project_assets
attr_accessor :project_assets

answered Mar 19, 2013 at 7:45

Rubyrider

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Comments

Tauqeer Ahmad · Accepted Answer · 2013-03-18 22:26:37Z

0

You should use nested_form gem for assets and you have to create an attribute of ticket_id in assets database table to work association properly.

answered Mar 18, 2013 at 22:26

Tauqeer Ahmad

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2 Comments

Rubyrider Over a year ago

but it is possible with out using nested form gem

Tauqeer Ahmad Over a year ago

yes it is possible without using nested_form but i think better way to do this is using nested_gem

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