Node-Express Rest API 中的不同 Get 方法

Question

I have been creating a website with Mean stack and I stuck at some point. I have a mongo db database and I am currently getting each file from database (to show them on Main page) with my Rest Api which is build with Express.

Server.js

var express = require('express');
var app = express();
var mongojs = require('mongojs');
var db = mongojs('mongodb://username...', ['myApp']);
var bodyParser = require('body-parser');

app.use(express.static(__dirname + '/public'));
app.use(bodyParser.json());

app.get('/myApp', function (req, res) {
    db.myApp.find(function (err, docs) {
        console.log(docs);
        res.json(docs);
    });
});

app.get('/myApp/:id', function (req, res) {
    var id = req.params.id;
    console.log(id);
    db.myApp.findOne({_id: mongojs.ObjectId(id)}, function (err, doc) {
        res.json(doc);
    })
});

app.listen(3001);
console.log('Server running on port 3001');

There is 2 get method and I can understand that because they have different parameters. So when I call them from controllers, there is no problem because if I provide id, it will call the second get method. But for example I want to use something like this in my website;

app.get('/myApp', function (req, res) {
    db.myApp.find({}).limit(2).skip(0, function(err, docs) {
        console.log(docs);
        res.json(docs);
    });
});

This get method have no parameter like the first get method in server.js but they do different jobs. This is limiting my search with 2 file. How can I use different get methods like this in my Mean Stack application?

This is my code for calling get method from my main controller. How can I make sure to call specific get method? Thanks..

$http.get('/myApp').success(function(response) { .. });

Answer 1

What you want is not possible. Somehow you need to distinguish between your 2 intentions, either by giving the endpoints different names (like you already suggest in your comment) or by providing for example a query parameter so you could do a call like:

$http.get('/myApp?limit=2').success(function(response) { .. });

When limit is omitted, you could return all results.

Something like:

app.get('/myApp', function (req, res) {
   var limit = req.query.limit;
   if (limit === undefined) {
      // Return everything
   } else {
      // make sure limit is some valid number
      // ... and do a mongo query limited to this number
   }
});