Reflection and removal of attachment_definitions

[the8472]

With dad6086 the only registry of paperclip attachments for each class was removed.

How are things doing reflection (automatically building UIs, serialization, ...) supposed to find all paperclip attachments for a class now? I see that there is Paperclip::Tasks::Attachments.names_for(klass) now, but this only seems to be intended for rake tasks as its namespace suggests.

[the8472]

Same with 40bdd3d, it removes attachment_for(field), which is a useful method to only access attachment objects instead of an arbitrary send(), which needs extra checking that we're not send()-ing evil things.

[ScotterC]

What's the best way to get the paperclip attachment options for a given class now. I'd like to get Delayed Paperclip up to speed quickly but it was fully dependent on #attachment_defintions.

[johnnyshields]

From paperclip-dimension gem:

      begin
        # new syntax (version > 3.4.2, commit on 2013-06-14)
        opts = ::Paperclip::Tasks::Attachments.definitions_for(self.class)[name]
      rescue
        # old syntax (version <= 3.4.2)
        opts = self.class.attachment_definitions[name]
      end

Please let me know if there's a better way to do it.

[jyurek]

I've reinstated the attachment_definitions method with dbb7e04, as seen in #1300, and I'm going to push this as 3.5.1 soon, so you shouldn't have to do anything. I'll be coming up with a good permanent API for it soon and will let you know.