从 Loopback 获取自定义 JSON 响应

Question

我使用 Loopback.It 做了一个简单的 API，效果很好，下面给出了这个 URL 的结果。 http://localhost:3000/api/CoffeeShops

[
  {
    "name": "Coffee shop 1",
    "city": "City one",
    "id": 1
  }
]

我需要将此 JSON 更改为此模板，通过使用 Loopback 中间件。

{
  "_embedded": {
    "CoffeeShops": [
      {
        "name": "Coffee shop 1",
        "city": "City one",
        "_links": {
          "self": {
            "href": "http://localhost:3000/CoffeeShops/1"
          },
          "CoffeeShop": {
            "href": "http://localhost:3000/CoffeeShops/1"
          }
        }
      }
   ]
   }
}

Answer 1

比中间件更好的是，您可以使用 remote hook

Use afterRemote hooks to modify, log, or otherwise use the results of a remote method before sending it to a remote client. Because an afterRemote hook runs after the remote method is executed, it can access the result of the remote method, but cannot modify the input arguments.

coffee-shop.js 中的以下代码可以解决问题

CoffeeShop.afterRemote('find', function(ctx, output, next) {
  ctx.result = {
    _embedded: {
      CoffeeShops: [{
        name: output.name,
        city: output.city,
        _links: {
          self: {
            href: "http://localhost:3000/CoffeeShops/" + id
          },
          CoffeeShop: {
            href: "http://localhost:3000/CoffeeShops/" + id
          }
        }
      }]
    }
  };
  next();
});