Add pagination links automatically

Pagination links will be included in your response automatically as long
as the resource is paginated using Kaminari or WillPaginate
and if you are using a JSON-API adapter. The others adapters does not have this feature.

lib/action_controller/serialization.rb

@@ -25,9 +25,10 @@ module ActionController
           "Please pass 'adapter: false' or see ActiveSupport::SerializableResource#serialize"
         options[:adapter] = false
       end
-      if options[:pagination]
-        options[:original_url] = original_url
-        options[:query_parameters] = query_parameters
+      if resource.respond_to?(:current_page) && resource.respond_to?(:total_pages)
+        options[:pagination] = {}
+        options[:pagination][:original_url] = original_url
+        options[:pagination][:query_parameters] = query_parameters
       end
       ActiveModel::SerializableResource.serialize(resource, options) do |serializable_resource|
         if serializable_resource.serializer?

lib/active_model/serializable_resource.rb

@@ -2,7 +2,7 @@ require "set"
 module ActiveModel
   class SerializableResource
 
-    ADAPTER_OPTION_KEYS = Set.new([:include, :fields, :adapter, :pagination])
+    ADAPTER_OPTION_KEYS = Set.new([:include, :fields, :adapter])
 
     def initialize(resource, options = {})
       @resource = resource

lib/active_model/serializer/adapter/json_api.rb

@@ -164,7 +164,7 @@ module ActiveModel
         def add_links(options)
           links = @hash.fetch(:links) { {} }
           resources = serializer.instance_variable_get(:@resource)
-          @hash[:links] = add_pagination_links(links, resources, options) if @options[:pagination]
+          @hash[:links] = add_pagination_links(links, resources, options) if options[:pagination]
         end
 
         def add_pagination_links(links, resources, options)

lib/active_model/serializer/adapter/json_api/pagination_links.rb

@@ -14,7 +14,7 @@ module ActiveModel
 
           def serializable_hash(options = {})
             pages_from.each_with_object({}) do |(key, value), hash|
-              query_parameters = options.fetch(:query_parameters) { {} }
+              query_parameters = options[:pagination].fetch(:query_parameters) { {} }
               params = query_parameters.merge(page: { number: value, size: collection.size }).to_query
 
               hash[key] = "#{url(options)}?#{params}"
@@ -51,7 +51,7 @@ module ActiveModel
 
           def url(options)
             self_link = options.fetch(:links) {{}}
-            self_link.fetch(:self) {} ? options[:links][:self] : options[:original_url]
+            self_link.fetch(:self) {} ? options[:links][:self] : options[:pagination][:original_url]
           end
         end
       end