Ruby on Rails 5，活动记录关联，仅API

Question

我正在开发一个React本机应用程序，作为项目的一部分，我正在使用Ruby on Rails 5在API Only模式下为Active Directory创建一个API，并使用ActiveAdmin作为管理界面。 我已完成所有设置，并且一切正常。

在我想出一个API的概念之前，先给我提供了文件中的数据，我需要使用rails来复制其结构，以便可以进行内容管理。

但是我似乎无法正确地获得活动记录关联。

这是数据文件的示例...

{
    name: 'Scottish Stoics',
    days: [
      {
        day: 'Monday',
        meeting: [
          {
            name: 'Meeting one',
            location: 'Test',
            startTime: '11.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting two',
            location: 'Test',
            startTime: '10.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting three',
            location: 'Test',
            startTime: '10.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
        ],
      },
      {
        day: 'Tuesday',
        meeting: [
          {
            name: 'Meeting one',
            location: 'Test',
            startTime: '10',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting two',
            location: 'Test',
            startTime: '10',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting three',
            location: 'Test',
            startTime: '10',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
        ],
      },
    ],
  },
  {
    name: 'Scottish Cycling Group',
    days: [
      {
        day: 'Sunday',
        meeting: [
          {
            name: 'Meeting one',
            location: 'Test',
            startTime: '11.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting two',
            location: 'Test',
            startTime: '10.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting three',
            location: 'Test',
            startTime: '10.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
        ],
      },
      {
        day: 'Tuesday',
        meeting: [
          {
            name: 'Meeting one',
            location: 'Test',
            startTime: '10.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting two',
            location: 'Test',
            startTime: '10.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
          {
            name: 'Meeting three',
            location: 'Test',
            startTime: '10.00',
            address: 'Test Street',
            meetingLength: '1 Hour',
            city: 'Edinburgh',
          },
        ],
      },
    ],
  }

我有一个小组模型，一天模型和一个会议模型。

组

 belongs_to :day
 belongs_to :meeting

会议

has_many :groups

天

has_many :groups

我得到这个结果。

[
    {
        id: 1,
        name: "Scottish Stoics",
        created_at: "2018-03-19T11:47:50.818Z",
        updated_at: "2018-04-12T10:50:05.179Z",
        day_id: 7,
        meeting_id: 81
    },
    {
        id: 2,
        name: "Scottish Cycling Group",
        created_at: "2018-03-19T11:47:57.498Z",
        updated_at: "2018-04-11T22:13:26.656Z",
        day_id: 7,
        meeting_id: 83
    },
]

现在，我可以使用jbuilder来获取日期名称和会议名称，但是我不能做的是选择一天的多个会议，并为该组选择多个天。 这种数据结构在Rails中甚至可能成为可能吗？

如果我应该使用其他类型的关联，我无法解决，有人能为我阐明一些关联吗？

Answer 1

假设顶级嵌套对应于Group，您可以像这样形成关联：

天

has_many :meetings
belongs_to :group

会议

belongs_to :day

组

has_many :days
has_many :meetings, through: :days

虽然我有印象，在JSON中提供的应该是meetings而不是meeting以保持RESTful