ruby-on-rails - 使用 active_model_serializers 序列化模型数组

Question

我正在尝试使用 gem active_model_serializers 将模型的序列化版本作为参数发送到 View

#app/serializers/admin_serializer.rb
class AdminSerializer < ActiveModel::Serializer
  attributes :id, :email, :access_locked?
end


#app/controllers/dashboard/admins_controller.rb
  def index
    @search = Admin.search(params[:q])
    @admins = @search.result(:distinct => true).page(params[:page]).per(10)

    @page_entries_info = view_context.page_entries_info @admins
    # render json: @admins
    respond_to do |format|
      format.html
      format.js
      format.json {render json: @admins}
    end
  end



#app/views/dashboard/admins/index.html.erb
  <%= debug (ActiveModel::Serializer::Adapter.adapter_class(:json_api).new(ActiveModel::Serializer.serializer_for(@admins.first).new(@admins.first),{}).to_json) %>
  <%= debug (@admins.all.map{|admin| AdminSerializer.new(admin).to_json}) %>

以上调试产生以下响应:

--- '{"data":{"id":"1","type":"admins","attributes":{"email":"tech@bluesapling.com","access_locked?":false}}}' //returned by the first debug


---
- '{"object":{"id":36,"email":"aubrey_schmitt@feeneykoch.io","created_at":"2016-03-28T05:15:17.546Z","updated_at":"2016-03-28T05:15:17.546Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":20,"email":"alysa_johnston@thompson.io","created_at":"2016-03-28T05:15:16.304Z","updated_at":"2016-03-28T05:15:16.304Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":22,"email":"kristofer.langosh@kunzeluettgen.com","created_at":"2016-03-28T05:15:16.459Z","updated_at":"2016-03-28T05:15:16.459Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":37,"email":"beryl_keler@wiza.biz","created_at":"2016-03-28T05:15:17.624Z","updated_at":"2016-03-28T05:15:17.624Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":5,"email":"wilhelmine_buckridge@crona.io","created_at":"2016-03-28T05:15:15.139Z","updated_at":"2016-03-28T05:15:15.139Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":14,"email":"edward_wisoky@corkery.net","created_at":"2016-03-28T05:15:15.838Z","updated_at":"2016-03-28T05:15:15.838Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":27,"email":"leonor@jerde.biz","created_at":"2016-03-28T05:15:16.848Z","updated_at":"2016-03-28T05:15:16.848Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":2,"email":"carley@wyman.net","created_at":"2016-03-28T05:15:14.873Z","updated_at":"2016-03-28T05:15:14.873Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":10,"email":"ervin.gleichner@cremin.org","created_at":"2016-03-28T05:15:15.527Z","updated_at":"2016-03-28T05:15:15.527Z"},"instance_options":{},"root":null,"scope":null}'
- '{"object":{"id":15,"email":"lonzo.dickens@johnscole.name","created_at":"2016-03-28T05:15:15.916Z","updated_at":"2016-03-28T05:15:15.916Z"},"instance_options":{},"root":null,"scope":null}'

在第一个调试中，我只序列化一个对象，而在第二个调试中，我试图对一组对象进行序列化。
第一个调试正确返回对象的序列化版本(以 json_api 格式)，而第二个调试则没有。
也尝试过 ArraySerializer，但没有成功:ActiveModel::Serializer::ArraySerializer.new(@admins, each_serializer: AdminSerializer).as_json我如何实现所需的序列化。此外，如果实现了，我可以使用其他一些简化版本吗？因为这个调试语句太冗长了。

尝试了这里提到的所有解决方案 - How do you initialize an ActiveModel::Serializer class with an ActiveRecord::Relation array?

我试图解决的基本问题是，在 Admin Controller 的 index 方法中，Admin 对象作为 PORO 传递给 index.html 文件。但我想要这个对象的序列化 json 版本，以便我可以将它作为 Prop 传递给我的 react 组件

index 方法在触发时呈现正确的 json http://dashboard.localhost.com:3000/admins.json


更新#1 对于索引方法

def index
    @search = Admin.search(params[:q])
    @admins_array = @search.result(:distinct => true).to_a
    if params[:page]
      @admins = @search.result(:distinct => true).page(params[:page][:number]).per(10)
      @admins_json_array = Kaminari.paginate_array(@admins_array).page(params[:page][:number]).per(10)
    else
      @admins = @search.result(:distinct => true).page(1).per(10)
      @admins_json_array = Kaminari.paginate_array(@admins_array).page(1).per(10)
    end
    @admins_json = ActiveModel::SerializableResource.new(@admins_json_array.to_a)
    ...
    ...
    ...
end

Answer 1

我有一个 Controller ，我需要在其中指定序列化程序，因为需要与默认序列化程序不同的属性。

在 Controller 中:

  def index
    search = User.ransack(search_params)
    render json: search.result, each_serializer: MembershipRenewalSerializer::MemberSerializer
  end

所以，只是为了让事情工作，如果你指定 each_serializer 会发生什么？选项？

编辑:

外部 Controller :

ActiveModel::SerializableResource.new(
  User.first(2), 
  each_serializer: MembershipRenewalSerializer::MemberSerializer
).to_json

注意，没有指定 each_serializer , SerializableResource将使用 UserSerializer .

编辑#2，

@admins 数据似乎发生了一些奇怪的事情。

尝试转换为数组:

ActiveModel::SerializableResource.new(@admins.to_a).to_json 

编辑 #3

要对数组进行分页，请尝试以下操作:

@search = Admin.search(params[:q])
@results = @search.result(:distinct => true).to_a
@admins = Kaminari.paginate_array(@results).page(params[:page]).per(10)