如何在 rails 上使用 active_model_serializer 渲染带有额外数据的 json？

Question

使用 Rails 4.1.6 和 active_model_serializers 0.10.3

app/serializers/product_serializer.rb

class ProductSerializer < ActiveModel::Serializer
  attributes :id, :title, :price, :published
  has_one :user
end

app/controllers/api/v1/products_controller.rb

class Api::V1::ProductsController < ApplicationController
  respond_to :json

  def index
    products = Product.search(params).page(params[:page]).per(params[:per_page])
    render json: products, meta: pagination(products, params[:per_page])
  end
end

当我检查响应正文时，它只显示产品数据：

[{:id=>1, :title=>"Side Auto Viewer", :price=>"1.6999510872877", :published=>false, :user=>{:id=>2, :email=>"indira.sawayn@watsica.us", :created_at=>"2016-12-29T03:44:40.450Z", :updated_at=>"2016-12-29T03
:44:40.450Z", :auth_token=>"ht7CsFWM1hvSGKM_zPmU"}}, {:id=>2, :title=>"Direct Gel Mount", :price=>"56.7935950121941", :published=>false, :user=>{:id=>3, :email=>"jaye.rolfson@leuschke.info", :created_at=>
"2016-12-29T03:44:40.467Z", :updated_at=>"2016-12-29T03:44:40.467Z", :auth_token=>"MTK_5rkFv8E6Fy7gyAtM"}}, {:id=>3, :title=>"Electric Tag Kit", :price=>"46.4689779902597", :published=>false, :user=>{:id=
>4, :email=>"tatiana@moen.co.uk", :created_at=>"2016-12-29T03:44:40.479Z", :updated_at=>"2016-12-29T03:44:40.479Z", :auth_token=>"fTd8z7PCLHxZ7aewLPDY"}}, {:id=>4, :title=>"Remote Tuner", :price=>"48.2478
906626996", :published=>false, :user=>{:id=>5, :email=>"pauline.gaylord@hettinger.info", :created_at=>"2016-12-29T03:44:40.486Z", :updated_at=>"2016-12-29T03:44:40.486Z", :auth_token=>"XC7ZhcyfPrpEyDw-M15
1"}}]

多余的数据meta没有被拾取。这个 active_model_serializers 版本不支持吗？或者有什么办法可以获得额外的数据？

编辑

pagination方法：

def pagination(paginated_array, per_page)
  { pagination: { per_page: per_page.to_i,
                  total_pages: paginated_array.total_pages,
                  total_objects: paginated_array.total_count } }
end

Answer 1

我遇到了同样的问题，已通过指定在调用渲染方法时使用的适配器解决了这个问题：

app/controllers/api/v1/products_controller.rb

class Api::V1::ProductsController < ApplicationController
  respond_to :json

  def index
    products = Product.search(params).page(params[:page]).per(params[:per_page])
    render json: products, meta: pagination(products, params[:per_page]), adapter: :json
  end
end

如何在 rails 上使用 active_model_serializer 渲染带有额外数据的 json？

How to render json with extra data with active_model_serializer on rails?

ruby

json

ruby-on-rails

active-model-serializers

编辑