Module: Attach::Attachable::ClassMethods

Defined in:
lib/attach/attachable.rb

Constant Summary collapse

DEFAULT_SIZES = 
[[:full, 400, 300, '#eee'], [:thumb, 96, 72, '#eee']]

Instance Method Summary collapse

Instance Method Details

#attachment(fld, klass, sizes = nil) ⇒ Object

For models with single photo



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# File 'lib/attach/attachable.rb', line 32

def attachment(fld, klass, sizes = nil)
  self.__send__(:instance_variable_set, "@#{fld}_sizes".to_sym, sizes)
  
  # def photo
  define_method(fld) do
    return nil unless self.id
    klass.first(:attachable_type => self.class.name, :attachable_id => self.id, :field_name => fld, :order => [:position.asc])
  end
  
  # def photos
  define_method(fld.to_s.pluralize) do
    if self.id
      klass.all(:attachable_type => self.class, :attachable_id => self.id, :field_name => fld, :order => [:position.asc])
    else
      []
    end
  end
  
  # def klass.photo_sizes
  singleton_class = class << self; self; end
  singleton_class.send(:define_method, "#{fld}_sizes") do
    instance_variable_get("@#{fld}_sizes".to_sym) || DEFAULT_SIZES
  end
  
  # def new_photo=
  define_method("new_#{fld}=") do |upload|
    photo = klass.create( :attachable_type => self.class,
                          :attachable_id => self.id,
                          :filename => upload.original_filename.split(/[\\\/]/)[-1],
                          :content_type => upload.content_type,
                          :size => upload.size,
                          :field_name => fld
    )
    
    if photo.filename[-4..-1].downcase == ".pdf"
      photo.update(:filename => photo.filename[0..-4] + "png")
    end
    
    @attachments_needing_id ||= Hash.new{ |hash, key| hash[key] = Array.new }
    @attachments_needing_id[fld.to_s] << photo unless self.id
    
    self.class.__send__("#{fld}_sizes").each do |style|
      dir_path = "public/assets/#{photo.id}/#{style[0]}"
      FileUtils.mkdir_p(dir_path)
      img = Magick::Image.read(upload.path)
      img[0].
        resize_matte(style[1], style[2], style[3]).
        write(photo.path(style[0]))
    end
  end
  
  # def replace_photo=
  # Deletes any current photos and adds a new photo
  define_method("replace_#{fld}=") do |upload|
    return false if upload.blank?
    self.__send__(fld.to_s.pluralize).each {|del_photo| del_photo.destroy}
    self.__send__("new_#{fld}=", upload)
  end
  
  # def destroy_photo_attachments=
  # 
  # Delete all attachments of attachment class. Called by before :destroy
  define_method("destroy_#{fld}_attachments") do
    self.__send__(fld.to_s.pluralize).destroy!
  end
  
  self.before(:destroy, "destroy_#{fld}_attachments".to_sym)
end

#attachments(fld, klass, sizes = nil) ⇒ Object 



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# File 'lib/attach/attachable.rb', line 101

def attachments(fld, klass, sizes = nil)
  attachment(fld.to_s.singularize, klass, sizes)
  
  define_method("new_#{fld}=") do |uploads|
    uploads.each { |upload| self.__send__("new_#{fld.to_s.singularize}=", upload) }
  end
  
  define_method("delete_#{fld}=") do |del_photos|
    del_photos.each { |id| self.__send__(fld).get(id).destroy }
  end
end