CODEWITHSUNDEEP
node.jsmongodbmongoose
Erik
Erik

Reputation: 14780

What methodOverride mean in node-express-mongoose-demo repository?

I've looked at the following code:

  app.use(methodOverride(function (req, res) {
    if (req.body && typeof req.body === 'object' && '_method' in req.body) {
      // look in urlencoded POST bodies and delete it
      var method = req.body._method;
      delete req.body._method;
      return method;
    }
  }));

in node-express-mongoose-demo repository and just interested what do the do? Does anybody could please explain me?

Upvotes: 0

Views: 230

Answers (1)

xShirase
xShirase

Reputation: 12399

From the official documentation :

Method Override lets you use PUT and DELETE http methods. In this case, your app looks for a _method parameter to a POST query, and if it finds it, overrides the POST request for a 'delete', and removes the parameter from the body. In practice, you'd use it like this on the client :

<form method="POST" action="/resource" enctype="application/x-www-form-urlencoded">
  <input type="hidden" name="_method" value="DELETE">
  <button type="submit">Delete resource</button>
</form>

Note the hidden input _method that will trigger your middleware's function.

Step by step :

if (req.body && typeof req.body === 'object' && '_method' in req.body) { //If we have a body, and it contains a _method field

  var method = req.body._method; // Override the POST method with the value of the _method field (eg:DELETE in our example)
  delete req.body._method; //remove the field from the body, we don't need it anymore
  return method;
} //And our POST request is now a DELETE!

Upvotes: 1

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