Get specific JSON object with node.js

Question

I want to be able to type localhost:3000/courses/1 and be able to get to show only the object in the json file from the id: 1.

I have a route to the site courses that looks like this and it displays my JSON file in the view when i loop through it just as it should. The js:json is my JSON file that I have required.

    app.get('/courses', function(req, res) {
    res.render('courses', {
        title: "Hello",
        name: "Fredrik",
        js: json
    });
});

[
{
"id":1,"courseId":"DT162G","courseName":"Javascript-baserad webbutveckling","coursePeriod":1
},
{
"id":2,"courseId":"IK060G","courseName":"Projektledning","coursePeriod":1
},
{
"id":3,"courseId":"DT071G","courseName":"Programmering i C#.NET","coursePeriod":2
}
]

But how can i make a route to show only one specific part of the JSON file when i type localhost:3000/courses/1 or /2 or /3?

So that the view looks like this..

 "id":1,"courseId":"DT162G","courseName":"Javascript-baserad webbutveckling","coursePeriod":1

ram hemasri · Accepted Answer · 2015-09-15 15:51:11Z

1

app.get('/courses/:id', function(req, res) {
    res.render('courses', {
        title: "Hello",
        name: "Fredrik",
        js: req.params.id !== undefined ? json.filter(function(obj) {return obj.id== req.params.id};}) : json
    });
});

answered Sep 15, 2015 at 15:51

ram hemasri

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1 Comment

Fredrik_Swe Over a year ago

That worked perfect! Im really new to Node so it would be awsome if you could explain how the code works!

Khalid · Accepted Answer · 2015-09-15 15:53:00Z

0

you may need to add a parameter to your route

app.get('/courses/:id', function(req, res) {
    res.render('courses', {
        title: "Hello",
        name: "Fredrik",
        js: getData(req.params.id)
    });
});

then a simple function that returns your object

function getData (id) { 
   if(typeof id == "undefined") {
       return json;
   }

   for(var i in json) { 
      if(json[i].id == id) {
         return json[id];
      }
   }
}

answered Sep 15, 2015 at 15:53

Khalid

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