Paperclip with Rails for image manipulation

I used the spree e-Commerce CMS for checking or R&D of Spree code. Spree is the really nice and basic tool for e-Commerce CMS.

When i was going through Spree i got to know about paperclip plugin which is used for image manipulation. Earlier i used “attachment_fu” for image manipulation and file uploading in rails projects.

How to use “Paperclip

First install perperclip plugin to your project.

Windows and Linux user can use my code. (I used this in WindowsXP and Fedora 9)

#ruby script /plugin install

through this command perperclip get installed in your project folder.

Many time you need photo upload functionality for customer

Here i used Customer contoller and Customer model for this lession

First run following command

#ruby script/generate paperclip ModelName FieldName

In my case command is:

#ruby script/generate paperclip Customer customer_pic

One migration file will be created through this command. Run that migration.

In Customer model file paste this code:

class Customer < ActiveRecord::Base
# Paperclip
has_attached_file :customer_pic,
:styles => {
:thumb=> "100x100#",
:small => "150x150>" }

Using this command you will save three pic(photo) in your system folder.

Default upload url of peperclip is (RAILS_ROOT/public/system/…)

You can use following lines in your model file. (copy & paste this code under styles code)

:url => “/uploads/:class/:attachment/:id/:style_:basename.:extension”,
:path => “:rails_root/public/uploads/:class/:attachment/:id/:style_:basename.:extension”

I added uploads folder front on :class. That is optional you can remove also.

If you are already having forms for customer and if you want to add that to form. Just use this code in your form tag.

:html => { :multipart => true

and in from <%= f.file_field :customer_pic%>

That sit. you need to add or use following code in View

<%= image_tag @user.customer_pic.url %>

<%= image_tag @user.customer_pic.url(:thumb) %>

Paperclip Validations

Here i giving some validation for Paperclip. You need to just copy & paste in to your model where you want to use image upload.

validates_attachment_content_type :avatar, :content_type => 'image/jpeg'

validates_attachment_presence :avatar

I found this plugin is very usefull for Me. It really saves lots of time.

This entry was posted in Linux Fedora8, Open source, Ruby on Rails and tagged , , , , , , by Purab Kharat. Bookmark the permalink.

About Purab Kharat

I am WordPress and Drupal Architect. I worked on many technologies like Ruby on Rails, Flex, PHP etc... I am Purab Kharat from India, Pune. I love to play chess and listen music and read books. I work in SY Smartsourcing Global Pvt Ltd in Princeton, NJ, USA. Now I am living at Plainsboro, 164 Hampshire Drive, Princeton Meadows, NJ. I have more then Ten years experience in Web Application Development (Specially in Php 5.0, Ruby on Rails, Mysql 5.0, RIA, Wordpress, Drupal, Joomla, Ecommerce)

4 thoughts on “Paperclip with Rails for image manipulation

  1. Hmm it looks like your site ate my first comment (it was super
    long) so I guess I’ll just sum it up what I had written and say, I’m thoroughly enjoying your
    blog. I too am an aspiring blog blogger but I’m still new to everything. Do you have any helpful hints for newbie blog writers? I’d certainly
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  2. Hi there just wanted to give you a brief heads up and let you know a few of the images aren’t loading correctly. I’m not sure why but
    I think its a linking issue. I’ve tried it in two different web browsers and both show the same outcome.

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