在关注栏内使用序列化器

Question

I am using serializer to format json response of my rails-api projector. I am using a concern to format final response. My code snippets are as follows

entry_controller.rb

class EntriesController < ApplicationController
  include Response

  def index
    @entries = @current_user.entries
    json_response(@entries)
  end
end

concerns/response.rb

module Response
  def json_response(response, error = nil, message = 'Success', code = 200)
    render json: {
        code: code,
        message: message,
        error: error,
        response: response
    }
  end
end

application_serializer.rb

class ApplicationSerializer < ActiveModel::Serializer
end

entry_serializer.rb

class EntrySerializer < ApplicationSerializer
  attributes :title, :content, :is_encrypted, :entry_date
end

In entries#index if i use json_response(@entries) my final response of request is not formatted and each entry is as in database. instead if i use render json: @entries . Im getting as per serializer. I want to use concern method json_response(@entries) along with serializers. Can someone suggest a way to use serializers in concern methods in a generic way as multiple controllers use same concern method. Thanks in advance.

Answer 1

Something related to serializer params is what you want to customise your response.

class EntriesController < ApplicationController
      include Response

      def index
        @entries = @current_user.entries
        render json: @entries, serializer_params: { error: nil, message: "Success", code: 200}
      end
    end

class EntrySerializer < ApplicationSerializer
  attributes :title, :content, :is_encrypted, :entry_date
  params :error, :message, :code

  def attributes
    super.merge(:error, :message, :code)
  end

end

Answer 2

I'm not sure I fully understand your question, but I don't believe render :json calls to_json recursively if it is given a hash, like in this case. So you may be looking for something like this in your concern:

  module Response
    def json_response(response, error = nil, message = 'Success', code = 200)
      render json: {
        code: code,
        message: message,
        error: error,
        response: response.to_json
      }
    end
  end