Rails - Paperclip - Multiupload - How to limit number of images?

Question

I have a Rails 3.2 application using Paperclip to attach mutliple images in one fied.

So, I have a Post model and a Image model.

My question is: How to validate the number of image like the size validation of Paperclip?

Thanks!

Answer 1

S0 I am assuming that one Post has_many Images.

You could try validating the number of images on save, something like the following (this code has not been tested!):

class Post
  has_many :images
  validate_on_create :images_limit

  private

  def images_limit
    return if images.blank?
    errors.add("You have reached the image limit") if images.length > 10
  end
end

class Image
  belongs_to :post
  validates_associated :post
end