在 Rails json 响应中包含关联

Question

学术批次属于学院

academic_batches = AcademicBatch.all
render json: {
  items: academic_batches.as_json({only: [:id, :name],include:[ academy: {only: [:name]} ]})                       
}

响应看起来像

[{"id"=>1, "name"=>"2010-2014", "academy"=>{"name"=>"College of Engineering Guindy"}}] 

但由于其他一些原因，我需要这样的回应：

[{"id"=>1, "name"=>"2010-2014", "academy"=>"College of Engineering Guindy"}] 

我应该做哪些改变？？

Answer 1

定义一个名为academy_name的方法并像下面这样访问，

academic_batches = AcademicBatch.all
render json: {
  items: academic_batches.includes(:academy).as_json({only: [:id, :name], methods: :academy_name})
}

如果您使用序列化程序（如https://github.com/rails-api/active_model_serializers & https://github.com/Netflix/fast_jsonapi ）来呈现 JSON 响应会更好。 这让工作变得简单

Answer 2

你可以这样做：

academic_batches = AcademicBatch.all
render json: {
  items: academic_batches.includes(:academy).as_json({only: [:id, :name]}).map {|a| a.merge(academy: a.academy.name)}
}