Module: Papercrop::ActiveRecordExtension::ClassMethods

Defined in:
lib/papercrop/active_record_extension.rb

Instance Method Summary collapse

Instance Method Details

#crop_attached_file(attachment_name, opts = {}) ⇒ Object

Initializes attachment cropping in your model

crop_attached_file :avatar

You can also define an aspect ratio for the crop and preview box through opts

crop_attached_file :avatar, :aspect => "4:3"

Parameters:

  • attachment_name (Symbol) —

    The name of the desired attachment to crop

  • opts (Hash) (defaults to: {}) 


21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
 
# File 'lib/papercrop/active_record_extension.rb', line 21

def crop_attached_file(attachment_name, opts = {})
  [:crop_x, :crop_y, :crop_w, :crop_h, :original_w, :original_h, :box_w, :aspect].each do |a|
    attr_accessor :"#{attachment_name}_#{a}"
  end

  if opts[:aspect].kind_of?(String) && opts[:aspect] =~ /^(\d{1,2}):(\d{1,2})$/
    opts[:aspect] = Range.new *opts[:aspect].split(':').map(&:to_i)
  end

  unless opts[:aspect].kind_of?(Range)
    opts[:aspect] = 1..1
  end

  send :define_method, :"#{attachment_name}_aspect" do
    opts[:aspect].first.to_f / opts[:aspect].last.to_f
  end

  attachment_definitions[attachment_name][:processors] ||= []
  attachment_definitions[attachment_name][:processors] << :cropper

  after_update :"reprocess_to_crop_#{attachment_name}_attachment"
end