ruby on rails - AMS: How to use collection serializer? -

i mean how should serializer implemented work collection?

from active model serializers documentation:

render json: @posts, serializer: paginatedserializer, each_serializer: postpreviewserializer 

how should paginatedserializer implemented?

i did this:

@posts = post.all render json: @posts 

and worked ok , did not required nor special collection serializer, nor each_serializer.

so i'm confused why need collection serializer.

to start answer "why need collection serializer",

i have controller methods return "unsorted" lists so:

[ {  id: 2,  collection_id: 3,  text_choice: "cover" }, {  id: 3,  collection_id: 3,  text_choice: "remix" }, {  id: 4,  collection_id: 4,  text_choice: "studio" } ] 

but want return these entries grouped collection_id , respond json this:

[ {  "3": [ {   id: 2,   text_choice: "cover"  },  {   id: 3,   text_choice: "remix"  } ] }, {  "4": [ {  id: 4,  text_choice: "studio" } ] } ] 

(sorry formatting: doing "blind" kind of difficult sublime text user ;) )

so arrived @ conclusion needed implement own collectionserializer transformation. you, couldn't find example; actually, you've given advanced answer there moment ! i'll try play start , create issue on gh.

i'll update if anything...

to anybody: feel free if know more !!