使用active_model_serializers序列化一系列模型 [英] Serialize an array of models using active_model_serializers
问题描述
我正在尝试使用宝石将模型的序列化版本作为参数发送到视图中active_model_serializers
#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:
Above debugs are yielding the below response:
--- '{"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}'
在第一次调试中,我只序列化一个对象,而在第二次调试中,我尝试对对象数组进行序列化.
第一次调试正确返回对象的序列化版本(json_api格式),而第二次调试则没有.
也尝试了ArraySerializer,但没有成功:ActiveModel::Serializer::ArraySerializer.new(@admins, each_serializer: AdminSerializer).as_json
如何实现所需的序列化.此外,如果实现了,我可以使用其他简化版本吗?由于此调试语句太冗长了.
In the first debug I am serializing only one object, while in the second one I am trying to do it for an array of objects.
The first debug is correctly returning the serialized version of the object(in json_api format) while second debug is not.
Tried ArraySerializer as well, with no success: ActiveModel::Serializer::ArraySerializer.new(@admins, each_serializer: AdminSerializer).as_json
how do I achieve the desired serialization. Moreover, if achieved, can I used some other simplified version of this? As this debug statement is way too verbose.
Tried all the solutions mentioned here - How do you initialize an ActiveModel::Serializer class with an ActiveRecord::Relation array?
我要解决的基本问题是,在Admin控制器的索引方法中,Admin对象作为PORO传递到index.html文件.但是我想要该对象的序列化json版本,以便可以将其作为道具传递给我的react组件
索引方法在触发 http://dashboard.localhost.com:3000时呈现正确的json /admins.json
UPDATE#1 用于索引方法
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
推荐答案
由于需要与默认序列化程序不同的属性,我有一个控制器需要在其中指定序列化程序.
I have a controller that I need to specify the serializer in, due to wanting different attributes from the default serializer.
在控制器中:
def index
search = User.ransack(search_params)
render json: search.result, each_serializer: MembershipRenewalSerializer::MemberSerializer
end
那么,为了使事情顺利进行,如果您指定each_serializer
选项会发生什么?
So, just to get things working, what happens if you specify the each_serializer
option?
外部控制器:
ActiveModel::SerializableResource.new(
User.first(2),
each_serializer: MembershipRenewalSerializer::MemberSerializer
).to_json
请注意,如果不指定each_serializer
,则SerializableResource
将使用UserSerializer
.
Note, that without specifying each_serializer
, SerializableResource
would use the UserSerializer
.
@admins数据似乎发生了一些奇怪的事情.
It looks like there is something weird happening with the @admins data.
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:
Edit #3
To paginate your array, try the following:
@search = Admin.search(params[:q])
@results = @search.result(:distinct => true).to_a
@admins = Kaminari.paginate_array(@results).page(params[:page]).per(10)
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