How to create thumbnail

Rails
1

Hi all
I want to create thumbnail for a uploaded image file, I have a
product controller and model with a image field .I want file uploaded
in the image field should have one thumbnail file and also one
general. I have tried a lot by installing plugins for thumbnails but
they are not working rendering errors like PLUGIN not found…

Please , give me some suggestions where I will create which
controller and action to create a thumbnail…

Thanks in advance…

2

Just try paperclip, very simple solution for it.

3

catz wrote:

Just try paperclip, very simple solution for it.

+1 for the paperclip recommendation, but you also need some image
processing package installed and available… ImageMagick, or something
similar.

Then it’s almost as simple as:

class Image < ActiveRecord::Base
has_attachment :content_type => [‘image/jpeg’, ‘image/png’],
:storage => :file_system,
:max_size => 500.kilobytes,
:resize_to => ‘800x600>’,
:thumbnails => { :thumb => ‘100x100>’}
end

in your model. There are plenty of tutorials out there available via
Googling.

4

On Jul 8, 5:46 pm, Ar Chron [email protected] wrote:

has_attachment :content_type => [‘image/jpeg’, ‘image/png’],
:storage => :file_system,
:max_size => 500.kilobytes,
:resize_to => ‘800x600>’,
:thumbnails => { :thumb => ‘100x100>’}
end

in your model. There are plenty of tutorials out there available via
Googling.

Posted viahttp://www.ruby-forum.com/.

Hi Catz and Ar chron thanks for giving idea for using paperclip …But
it’s not installing from their repository sites .Can I download the
repository and copy it into my vendor/plugins dir …? and should it
work???

thanks

5

On Jul 8, 6:20 pm, debadatta [email protected] wrote:

in your model. There are plenty of tutorials out there available via
Googling.

Posted viahttp://www.ruby-forum.com/.

Hi Catz and Ar chron thanks for giving idea for using paperclip …But
it’s not installing from their repository sites .Can I download the
repository and copy it into my vendor/plugins dir …? and should it
work???

thanks

:style => is not working for paperclip gem in my app
please help

thanks

6

It’s really hard to help you without seeing the code that is causing the
error and the log that gives the details of the error message. For
example, your problem could be as simple as using *:style => *(singular)
instead of :styles => (plural) in your model.

Also, it’s could be that you are using a version of ruby and/or rails
that
is not supported with the version of paperclip you have installed. But,
as
above, it’s impossible to tell without more information.

That said, I often find the best way to build confidence in a new gem is
to
follow the examples given in the documentation that comes with the gem.
Build yourself a new app that will only be used to upload and display
images. Then follow through the examples given in the README.md at
GitHub - thoughtbot/paperclip: Easy file attachment management for ActiveRecord.

The paperclip gem and ImageMagick are tools that get a lot of use in RoR
code. They will work for you if you follow the directions for use.