負荷協會的一個級別，而在主動型串行有條件側面加載協會

Question

AMS版本0.8.3，

我創造了這樣一個base_serializer.rb和擴展相同。

class BaseSerializer < ActiveModel::Serializer 
    def include_associations! 
    if @options[:embed] 
     embed = @options[:embed].split(',').map{|item| item.strip.to_sym} 
     embed.each do |assoc| 
     include! assoc if _associations.keys.include?(assoc) 
     end 
    end 
    end 
end 

class EventSerializer < BaseSerializer 
    attributes :id, :name 
    has_many :organizers, serializer: OrganizerSerializer 
    has_many :participants, serializer: ParticipantSerializer 
end 

class OrganizerSerializer < BaseSerializer 
    attributes :id, :name 
    has_many :related, serializer: RelatedSerializer 
end 

class ParticipantSerializer < BaseSerializer 
    attributes :id, :name 
    has_many :related, serializer: RelatedSerializer 
end 

class RelatedSerializer < BaseSerializer 
    attributes :id, :name 
    has_many :something, serializer: SomethingSerializer 
end 

和EventsController索引方法寫成

# GET /events?embed=organizers,participants 
    def index 
     @events = Event.all 
     render json: @events, embed: params[:embed] 
    end 

有了這個，我可以得到：ID和：事件，組織者和參與者的名字。但是，我也需要相關聯繫的屬性。我不需要串行器的細節。我想爲每個協會去這個級別。我怎樣才能做到這一點？

Answer 1

我最終這樣做是爲了達到同樣的目的。

class BaseSerializer < ActiveModel::Serializer 
    def include_associations! 
    @options[:embed_level] ||= 2 
    return unless @options.key?(:embed) && @options[:embed_level] != 0 
    embed = @options[:embed].split(',').map{|item| item.strip.to_sym} 
    embed.each do |assoc| 
     next unless _associations.key?(assoc) 
     assoc_serializer = serializer_for(assoc) 
     embed = @options[:embed] 
     embed_level = @options[:embed_level] 
     @options[:embed_level] = @options[:embed_level] - 1 
     @options[:embed] = assoc_serializer._associations.keys.join(",") 
     include! assoc 
     @options[:embed_level] = embed_level 
    end 
    end 

    def serializer_for(assoc) 
    serializer = _associations[assoc].options[:serializer] 
    return serializer if serializer 
    assoc.to_s.classify.concat("Serializer").constantize 
    end 
end 

編號：Github Issue Link 特別感謝勒芒羅伯特！