How to add pagination links

JSON-API adapter

Pagination links will be included in your response automatically as long as the resource is paginated and if you are using a JSON-API adapter.

If you want pagination links in your response, use Kaminari or WillPaginate.

#kaminari example
@posts = Kaminari.paginate_array(Post.all).page(3).per(1)
render json: @posts

#will_paginate example
@posts = Post.all.paginate(page: 3, per_page: 1)
render json: @posts

ActiveModel::Serializer.config.adapter = :json_api

ex:

{
  "data": [
    {
      "type": "articles",
      "id": "3",
      "attributes": {
        "title": "JSON API paints my bikeshed!",
        "body": "The shortest article. Ever.",
        "created": "2015-05-22T14:56:29.000Z",
        "updated": "2015-05-22T14:56:28.000Z"
      }
    }
  ],
  "links": {
    "self": "http://example.com/articles?page[number]=3&page[size]=1",
    "first": "http://example.com/articles?page[number]=1&page[size]=1",
    "prev": "http://example.com/articles?page[number]=2&page[size]=1",
    "next": "http://example.com/articles?page[number]=4&page[size]=1",
    "last": "http://example.com/articles?page[number]=13&page[size]=1"
  }
}

AMS relies on either Kaminari or WillPaginate. Please install either dependency by adding one of those to your Gemfile.

JSON adapter

If you are using JSON adapter, pagination links will not be included automatically, but it is possible to do so using meta key.

In your action specify a custom serializer.

render json: @posts, serializer: PaginatedSerializer, each_serializer: PostPreviewSerializer

And then, you could do something like the following class.

class PaginatedSerializer < ActiveModel::Serializer::ArraySerializer
  def initialize(object, options={})
    meta_key = options[:meta_key] || :meta
    options[meta_key] ||= {}
    options[meta_key] = {
      current_page: object.current_page,
      next_page: object.next_page,
      prev_page: object.prev_page,
      total_pages: object.total_pages,
      total_count: object.total_count
    }
    super(object, options)
  end
end

ex.

{
  "articles": [
    {
      "id": 2,
      "title": "JSON API paints my bikeshed!",
      "body": "The shortest article. Ever."
    }
  ],
  "meta": {
    "current_page": 3,
    "next_page": 4,
    "prev_page": 2,
    "total_pages": 10,
    "total_count": 10
  }
}

FlattenJSON adapter

This adapter does not allow us to use meta key, due to that it is not possible to add pagination links.

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How to add pagination links

JSON-API adapter

JSON adapter

FlattenJSON adapter

2.7 KiB

Raw Blame History