Ruby on rails 在Ruby中重用GraphQL参数

我正在使用rails和GraphQlRubyGem构建我的第一个GraphQLAPI。到目前为止，它非常简单，非常棒

我现在有点被重复的代码卡住了。我有一个项目管理rails应用程序，它有空间、TODO（它们属于一个空间）、用户

我想要实现的是能够查询空间及其TODO，但也可以查询当前用户的所有TODO，例如。对于TODO，我希望能够使用不同的参数筛选它们：

完成-布尔， 范围-字符串（今天或本周）， 受让人-整数（用户Id）

这意味着每次我拿到字段TODO时，我都希望能够过滤它们，无论它们是完成的还是今天到期的，等等

我知道如何使用参数，一切都很好，但目前我得到了相同的编码器一遍又一遍。每次我有相同的todos字段时，我如何（在哪里）提取代码以使其可重用

field :todos, [TodoType], null: true do
  argument :done, Boolean, required: false
  argument :scope, String, required: false
  argument :limit, Integer, required: false
end

---

好吧，正如@jklina所说，我最终使用了一个自定义解析器

我改变了：

field :todos, [TodoType], null: true do
  argument :done, Boolean, required: false
  argument :scope, String, required: false
  argument :limit, Integer, required: false
end

致：

并添加了一个解析器：

module Resolvers
  class Todos < Resolvers::Base
    type [Types::TodoType], null: false

    TodoScopes = GraphQL::EnumType.define do
      name "TodoScopes"
      description "Group of available scopes for todos"
      value "TODAY", "List all todos that are due to today", value: :today
      value "THISWEEK", "List all todos that are due to the end of the week", value: :this_week
    end

    argument :done, Boolean, required: false
    argument :scope, TodoScopes, required: false
    argument :limit, Integer, required: false
    argument :assignee_id, Integer, required: false

    def resolve(done: nil, scope:nil, limit:5000, assignee_id: nil)
      todos = object.todos

      # filtering the records...

      return todos.limit(limit)
    end
  end
end

模块解析器
类Todos

---

很简单

我没有正式的答案，但我知道您可以在GraphQL中使用类似范围的查询。这是一个关于搜索模型的教程：如果您看到方法

normalize_filters

，它只是使用Rails中类似作用域的语法来创建完整的查询。文档在这里提供了一些建议：

field :todos, resolver: Resolvers::Todos, description: "All todos that belong to a given space"

module Resolvers
  class Todos < Resolvers::Base
    type [Types::TodoType], null: false

    TodoScopes = GraphQL::EnumType.define do
      name "TodoScopes"
      description "Group of available scopes for todos"
      value "TODAY", "List all todos that are due to today", value: :today
      value "THISWEEK", "List all todos that are due to the end of the week", value: :this_week
    end

    argument :done, Boolean, required: false
    argument :scope, TodoScopes, required: false
    argument :limit, Integer, required: false
    argument :assignee_id, Integer, required: false

    def resolve(done: nil, scope:nil, limit:5000, assignee_id: nil)
      todos = object.todos

      # filtering the records...

      return todos.limit(limit)
    end
  end
end