[Question] Nesting 2 or more collections into 1

[rpristopan]

I have the below Roar::Decorator and I want to join 2 collections into 1 to have object.images an array with all the original and suggested images from a json file. Is it possible? Right know the last definition of collection images will always override the collection.

class ObjectRepresenter < Roar::Decorator
  include Roar::JSON

  nested :images do
    collection :images, as: :originals, extend: Images::OriginalRepresenter, class: Image
    collection :images, as: :suggested, extend: Images::SuggestedRepresenter, class: Image
  end
end

JSON file:

{
 ...
 images: [
   originals: [
     { file_name: "foo1.jpg" },
     { file_name: "bar1.jpg" },
   ],
   suggested: [
     { file_name: "foo2.jpg" },
     { file_name: "bar2.jpg" },
   ]
 ]
...
}

[apotonick]

Sorry, this is not possible, you need to map your data before you pass it into the representer. Remember, Representable/Roar is a document-transformation tool and not a data mapper (even though many people misuse it as this). 😜

The reason this doesn't work is that when parsing, Roar wouldn't know where to add the images, to originals or to suggested?

[rpristopan]

@apotonick, yeah, that's what I was thinking.

I change the json file to have another format and I used only 1 collection for images with 1 representer.

{
 ...
 images: [
     { 
         file_name: "foo1.jpg", 
         type: "original"
     },
     { 
         file_name: "bar1.jpg",
         type: "original"
      },
     { 
         file_name: "foo2.jpg",
         type: "suggested"
      },
     { 
         file_name: "bar2.jpg",
         type: "suggested"
    },
 ]
...
}