从服务器控制器MEANjs访问API端点 [英] Access API endpoints in MEANjs from server controller

问题描述

所以我有这个问题我在我的应用程序上的'以下'的功能工作。什么是重要的，我有两个型号：

so i have this problem i am working on 'following' feature in my application. What's important, i have two models:

跟随和通知

当我打到按照前端按钮，我从运行功能 follow.client.controller.js 哪些职位到API端点 / API /如下相当于 follow.server.controller.js ，然后更新操作执行执行模式 - 简单。据我所知，多数民众赞成它是如何工作（和它的作品对我来说）。

When I hit follow button in front-end I run function from follow.client.controller.js which POSTs to API endpoint /api/follows which corresponds to follow.server.controller.js and then update action on Follows model is performed - easy. AFAIK thats how it works (and it works for me).

但 follows.server.controller.js 我想也是在 / API /通知相当于 notifications.server.controller.js ，但我不能找到一个妥善的办法做到这一点。任何帮助将AP preciated。

But in follows.server.controller.js I want also invoke post to API endpoint at /api/notifications which corresponds to notifications.server.controller.js but I can't find a proper way to do that. Any help will be appreciated.

我不希望从前端另一个呼叫添加通知，因为它应该是自动=如果用户开始关注的人，信息被立即保存在两个模型。

I don't want another call from front-end to add notification because it should be automatic = if user starts following someone, information is saved in both models at once.

推荐答案

您可以在您的服务器路由添加中间件。

You can add middleware in your server route.

app.route('/api/follows')
    .post(notification.firstFunction, follows.secondFunction);

现在在你的contollers添加2种方法。首先会调用数据库，并添加的一些结果的数据请求将被转发到第二个方法的对象。

And now add 2 methods in your contollers. First makes the call to db and add's some result's data to request object which will be forwarded to second method.

exports.firstFunction= function(req, res, next) {

    Notification.doSometing({
        }).exec(function(err, result) {
            if (err) return next(err);
            req.yourValueToPassForward = result
            next(); // <-- important
        });

};

exports.secondFunction= function(req, res) {
    //...
};

或者你可以在一个API的方法使一些数据库调用，参加此呼吁与承诺。例如：

Or you can make few database calls in one api method, joining this calls with promises. Example:

var promise = Meetups.find({ tags: 'javascript' }).select('_id').exec();
promise.then(function (meetups) {
  var ids = meetups.map(function (m) {
    return m._id;
  });
  return People.find({ meetups: { $in: ids }).exec();
}).then(function (people) {
  if (people.length < 10000) {
    throw new Error('Too few people!!!');
  } else {
    throw new Error('Still need more people!!!');
  }
}).then(null, function (err) {
  assert.ok(err instanceof Error);
});

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