Show list of attachments using Paperclip in Rails Application - ruby-on-rails

Question

I am having issues with paperclip in my rails application. I am able to attach multiple files (PDFs) to my form, but when I try to show more than 1 attachment in the show.html.erb file I get errors.
The code that works in the edit and new views:
<%= f.fields_for :assets do |asset| %>
<% if asset.object.new_record? %>
<%= asset.file_field :document %>
<% end %>
<% end %>
</div>
<div class="existingPaperclipFiles">
<% f.fields_for :assets do |asset| %>
<% unless asset.object.new_record? %>
<div class="thumbnail">
<%= link_to( image_tag(asset.object.document.url(:thumb)), asset.object.document.url(:original) ) %>
<%= asset.check_box :_destroy %>
</div>
<% end %>
<% end %>
</div>
I have created a separate assets model to keep all the attachments related to my equipment model. When I create a "link_to asset.object.document.url" in the show view I get NoMethod errors. I want to attach both .doc, PDF, and image files to my application if there is a better way than paperclip please help!
The assets model:
class Asset < ActiveRecord::Base
belongs_to :equipment
has_attached_file :document, :styles => {:thumb => '150x150#', :medium => '300x300#', :large => '600x600#' }
end
The equipment model:
class Equipment < ActiveRecord::Base
validates :equipment_id, presence: true
validates :location, presence: true
has_many :assets, :dependent => :destroy
accepts_nested_attributes_for :assets, :allow_destroy => true
end
My equipment_controller:
class EquipmentController < ApplicationController
def index
#equipment = Equipment.paginate(page: params[:page])
end
def show
#equipment = Equipment.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render json: #equipment }
end
end
def new
#equipment = Equipment.new
5.times {#equipment.assets.build}
end
def create
#equipment = Equipment.new(params[:equipment])
respond_to do |format|
if #equipment.save
format.html { redirect_to #equipment, notice: 'Equipment was successfully added.' }
format.json { render json: #equipment, status: :created, location: #equipment }
else
format.html { render action: "new" }
format.json { render json: #equipment.errors, status: :unprocessable_entity }
end
end
end
def edit
#equipment = Equipment.find(params[:id])
5.times {#equipment.assets.build}
end
def update
#equipment = Equipment.find(params[:id])
respond_to do |format|
if #equipment.update_attributes(params[:equipment])
format.html { redirect_to #equipment, notice: 'Equipment was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: #equipment.errors, status: :unprocessable_entity }
end
end
end
def destroy
#equipment = Equipment.find(params[:id])
#equipment.destroy
respond_to do |format|
format.html { redirect_to equipment_url }
format.json { head :no_content }
end
end
private
def correct_user
#Equipment = Equipment.find(params[:id])
redirect_to(root_path) unless current_user?(#Equipment)
end
def admin_user
redirect_to(root_path) unless current_user.admin?
end
end
Any help is greatly appreciated.

Answer 1

You didn't give the code for the show view where you're having the error, but you should be able to do something like this to show thumbnails with links to the original files:
<% #equipment.assets.each do |asset| %>
<%= link_to image_tag(asset.document.url(:thumb)), asset.document.url(:original) %>
<% end %>
I'm not sure why you have "object" in your Paperclip URLs, as I haven't seen that format used for Paperclip.

Answer 2

I actually was able to figure this out by doing the following:
<% for asset in #equipment.assets %>
<p>
<%= link_to asset.document_file_name,
asset.document.url(:original) %>
</p>
<% end %>