根据请求环回发送关系数据

Question

在环回中，我们有模型关系。这是一个示例模型

{
  id: "gdfgd",
  name: "companyname",
  ownerId: "userId",
}

当使用 get 端点请求时，响应是这样的。

但是有没有办法使环回解析这些 ID 并发回嵌入在响应中的实际用户数据？

像这样

    {
      id: "gdfgd",
      name: "companyname",
      ownerId: {
        id: "hhrtgrt",
        username: "username",
        email: "ggg@ggg.gg"
      },
    }

Answer 1

您也应该检查 docs (include relations) about the relations in loopback, especially include filter. You can include a relationship in your request, for example, if you have a List model and a Task model, then you can have Task belongsTo List relationship and List hasMany Task relationship. You can check how to define those relationships in docs (relations)。

// model: List 
...
"relations":  {
  "tasks": {
    "type": "hasMany",
    "model": "Task",
    "foreignKey": ""
  }
}

// model: Task
...
"relations":  {
  "list": {
    "type": "belongsTo",
    "model": "List",
    "foreignKey": ""
  }
}

当您正确定义模型之间的关系时，您的 GET 请求可能如下所示：

localhost:3000/api/List?filter[include]='tasks'  // get all lists with all tasks - each list will have all its tasks

或

localhost:3000/api/Task?filter[include]='list'  // get all tasks with their list - each task will have its parent list

总的来说，loopback doc 是开始旅程的好地方，他们给出了很多例子并且描述得很好。

根据请求环回发送关系数据

Loopback send relation data on request

loopbackjs