tengo los siguientes modelos:estilos que solicitan condicionalmente a paperclip adjuntos en Rails 3.1
Post.rb
class Post < ActiveRecord::Base
belongs_to :category
has_many :attachments, :dependent => :destroy
has_many :citations, :dependent => :destroy
validates :title, :category_id, :content, :presence =>true
acts_as_taggable_on :keywords
accepts_nested_attributes_for :attachments, :allow_destroy => true,
:reject_if => proc { |attributes| attributes['photo'].blank?}
accepts_nested_attributes_for :citations, :allow_destroy=>true
end
Attachment.rb
class Attachment < ActiveRecord::Base
belongs_to :post
has_attached_file :photo, :styles => { :medium => "637x471>",
:thumb => Proc.new { |instance| instance.resize },
:carousel => Proc.new { |instance| instance.decide_style }
},
:url => "/pictures/:style/:basename.:extension",
:path =>":rails_root/public/pictures/:style/:basename.:extension"
validates_attachment_content_type :photo, :content_type => ['image/png', 'image/jpg', 'image/jpeg']
validates_attachment_size :photo, :less_than => 2.megabytes
### End Paperclip ####
def decide_style
# catid = Post.find(param[:post_category_id])
# something here to get the selection from the form.
if(catid == 2)
# "400x800>" or custom style here
end
end
def resize
geo = Paperclip::Geometry.from_file(photo.to_file(:original))
ratio = geo.width/geo.height
min_width = 142
min_height = 119
if ratio > 1
# Horizontal Image
final_height = min_height
final_width = final_height * ratio
"#{final_width.round}x#{final_height.round}!"
else
# Vertical Image
final_width = min_width
final_height = final_width * ratio
"#{final_height.round}x#{final_width.round}!"
end
end
end
Estoy tratando de aplicar un estilo condicional , basado en la selección hecha desde un menú desplegable en el formulario. Simplemente no estoy seguro de dónde se implementa la decisión sobre qué estilo se debe elegir.
¿Pensamientos?
Rishi
Gracias Matt! Desde entonces he resuelto el problema, pero su enfoque es bueno. – frishi