Question

如何使用loopbackJS以下列格式制作API响应。

{
"meta": {
        "limit": 20,
        "next": "/api/Questions/?limit=20&offset=20",
        "offset": 0,
        "previous": null,
        "total_count": 215
},
"objects": [...]
}

Answer 1

您可以重写回复，我使用afterRemote remote hook来处理回复。

以下是common/models/car.js让您入门的示例。

module.exports = function(Car) {
  // before the static .find methods
  Car.afterRemote('**', function(ctx, car, next) {
    console.log(ctx.methodString, 'was invoked remotely');
    if(ctx.result) {
      var result = ctx.result;
      ctx.result = {
        objects: result,
        meta: {
          limit: 20,
          next: ctx.req.baseUrl,
          offset: 0,
          previous: '',
        }
      };
      if(Array.isArray(ctx.result.objects)) {
        ctx.result.meta.count = ctx.result.objects.length;
      }
    }
    next();
  });
};

使用该代码可以获得如下输出：

{"objects":[
    {"model":"Nissan","make":"Leaf","year":2013,"id":1},
    {"model":"Telsa","make":"S","year":2014,"id":2},
    {"model":"Chevrolet","make":"Volt","year":2014,"id":3},
    {"model":"Toyota","make":"Prius C","year":2015,"id":4}
],
"meta":{
    "limit":20,
    "next":"/api/cars",
    "offset":0,
    "previous":"",
    "count":4
}}

在API响应中创建元对象

1 个答案: