环回推送阵列 [英] Loopback push array

问题描述

如何制作更新/推送的自定义 remoteMethod ，不覆盖，属性阵列。
所以基本上将数据推送到模型的数组属性。

How would I go about making a custom remoteMethod that updates/pushes, not overrides, a property that is an array. So basically push data to an array property of a model.

我在文档中找不到任何明确的例子，除了 .add（）帮助器方法，但需要 embedsOne 或其他一些关系。

I can't find any clear examples of this in the documentation, except for an .add() helper method, but that requires an embedsOne or some other relation.

但如果我有单 模型在我的整个应用程序中，只想将一些数据推送到 ID 。
所以最后得到一个端点，如：

But what if I have a single Model in my whole app and would just want to push some data to an id. So ending up with an endpoint like:

POST / Thing / {id} / pushData

而 POST 的正文将是：

  {
     id: "foo",
     data: "bar"
   }

（或者最好没有 id ，并且 id autoInserted ，因为它是一个数组，并且我不需要每个项目的id， data 部分应该是可搜索的with filters / where）

(Or preferably without id, and have the id autoInserted, since it's an array, and I don't need an id for each item, the data part should be searchable with filters/where)

到目前为止，我有：

  Thing.remoteMethod (
      'pushData',
      {
        isStatic: false,
        http: {path: '/pushData', verb: 'post'},
        accepts: [
          { arg: 'data', type: 'array', http: { source: 'body' } }
        ],
        returns: {arg: 'put', type: 'string'},
        description: 'push some Data'
      }
  );

  Thing.prototype.pushData = function(data, cb) { 
    data.forEach(function (result) {
      // ??
    });
    cb(null, data)
  };

据我所知，默认端点只允许添加单个实例，但是我想要批量更新。

And as far as I can see, the default endpoints only allow single instances to be added, but I want to update in bulk.

推荐答案

你已经使你的方法非静态，这很好。

You have made your method non-static, which is good.

现在，如果您的数组属性被称为 MyArray ，我会尝试以下方式：

Now, if your array property is called MyArray, I would try something along the lines of :

  Thing.remoteMethod (
      'pushData',
      {
        isStatic: false,
        http: {path: '/pushData', verb: 'post'},
        accepts: [
          { arg: 'data', type: 'array', http: { source: 'body' } }
        ],
        returns: {arg: 'put', type: 'string'},
        description: 'push some Data'
      }
  );

  Thing.prototype.pushData = function(data, cb) {
    thingInstance = this; 
    data.forEach(function (result) {
       thingInstance.MyArray.push(result.data);
    });

    cb(null, data)
  };

由于您的远程方法是非静态的，您应该能够使用<$ c $访问该实例C>此。我怀疑你是否可以通过编写 this.someProperty 直接访问属性，请尝试一下，如果这不起作用，请告诉我。

Since your remote method is non-static, you should able to access the instance using this. I have a doubt whether or not you can directly access properties that way by writing this.someProperty, please try it and let me know if that doesn't work.

然后批量创建只需向远程发出标准POST请求

Then to create in bulk just make a standard POST request to your remote

POST /Thing/{id}/pushData

只需像这样写你的JSON

just write your JSON like this

{
   {
       data: "bar"
   },
   {
       data: "foo"
   },
   //etc
}

这应该在数组属性中添加两个元素。

This should add two elements to the array property.

让我知道这是否有用

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