How to implement query string parameters for RESTful APIs

debugcn 投稿 Dev

Dawn17

I am new to RESTful APIs and I've successfully implemented the GET and DELETE command for my API (GET localhost:4000/api, DELETE localhost:4000/api on Postman works fine).

Code for my get looks like:

router.get('/', function(req, res) {
    user.find({}, function(err, users) {
        if(err){
            res.status(404).send({
                message: err,
                data: []
            });
        } else {
            res.status(200).send({
                message: 'OK',
                data: users
            });
        }
    });
});

Now I want to implement using parameters. For example, I want to implement something like sorting where

http://localhost/4000/api/users?sort={"name": 1} (1- ascending; -1 - descending)

would mean sorting the name in ascending order.

What I am not sure how to do is:

How do I make the ?sort thing work?
How do I select which field to sort?

Please help!

donquixote

You can only pass order(asc, desc), if you want to sort by name you can do like that http://localhost/4000/api/users?order=-1 or http://localhost/4000/api/users?&order=1

then in your controller

router.get('/', function(req, res) {
  let order = req.query.order;
  user
   .find({})
   .sort({"name": order}) 
   .exec(function(err, users) {
      if(err){
          res.status(404).send({
              message: err,
              data: []
          });
      } else {
          res.status(200).send({
              message: 'OK',
              data: users
          });
      }
  });

});

These works if you use mongoose.js for mongodb

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