paperclip-dimension-validator

Validate them dimensions!

Installation

Add this line to your application's Gemfile:

gem 'paperclip-dimension-validator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install paperclip-dimension-validator

Usage

This gem introduces the dimensions validator for Paperclip's validates_attachment. dimensions accepts a hash of height and width integer pixel values.

Example

class Image < ActiveRecord::Base
  has_attached_file :avatar

  validates_attachment :avatar, dimensions: { height: 30, width: 30 }
end

dimensions also accepts a hash of height and width ranges.

Example with ranges

class Image < ActiveRecord::Base
  has_attached_file :avatar

  validates_attachment :avatar, dimensions: { height: 30..100, width: 30..150 }
end

Testing

paperclip-dimension-validator includes rspec-compatible matchers for testing.

Note In order to use these matchers make sure to include either chunky_png or oily_png as a dependency in your Gemfile.

Gemfile

group :test do
  gem 'chunky_png'
end

RSpec

In spec_helper.rb, you'll need to require the matchers:

require 'paperclip/matchers/validate_attachment_dimesions_matcher'

And include the paperclip matchers module:

RSpec.configure do |config|
  config.include Paperclip::Shoulda::Matchers
end

Example

it { should validate_attachment_dimensions(:avatar).height(30).width(30) }

Example with ranges

it { should validate_attachment_dimensions(:avatar).height(30..100).width(30..150) }

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request