CODEWITHSUNDEEP
node.jsmongodberror-handlingsails.jsnode-webkit
DivyaMenon
DivyaMenon

Reputation: 311

Handle server errors in SailsJS

I am creating an application in SailsJS. I am getting errors, like, typeError or 500 errors when some error occurs in DB related queries.I am using MongoDB. Is there any way that I can catch this error in server-side.

Now, these errors are crashing my server. And the server stops. I have to restart the server again.

Please help me in fixing this issue. Thanks in advance.

Upvotes: 1

Views: 2342

Answers (3)

Zuker
Zuker

Reputation: 1083

If you are using Sails 0.10.x you can pass errors to next handler:

controlleAction:function(req,res, next){
 var invalidParams = {};//whatever's causing the error

 Model
  .create(invalidParams)
  .exec(function(err,created){
    if(err) return next(err);
    return res.json(created);
  });
}

And then process errors in "Custom Responses"

Upvotes: 0

josebaseba
josebaseba

Reputation: 101

Please be careful there:

controlleAction:function(req,res){
  var invalidParams = {};//whatever's causing the error

  Model
  .create(invalidParams)
  .exec(function(err,created){
    // return res.json()
    if(err) return res.json(err);
    return res.json(created);
  });
}
// The difference is in the return
if(err) return res.json(err);

If you have an error, without the return, the server will crash because it would try to send two responses one with the error and another one with the created object.

Upvotes: 1

aclave1
aclave1

Reputation: 1711

Most likely waterline is throwing an exception and you're not catching it. Here's some code to fix that:

controlleAction:function(req,res){
  var invalidParams = {};//whatever's causing the error

  Model
  .create(invalidParams)
  .exec(function(err,created){
    if(err) res.json(err);
    res.json(created);
  });
}

you could also use the promise syntax

controlleAction:function(req,res){
  var invalidParams = {};//whatever's causing the error

  Model
  .create(invalidParams)
  .then(function(created){
    res.json(created);
  })
  .catch(function(err){
    res.json(err);
  });
}

If you're trying to catch every global error in your entire application, in your app.js, there's a line like this:

// Start server
sails.lift(rc('sails'));

surround that line with a try catch block like so:

try{
  // Start server
  sails.lift(rc('sails'));
}catch(e){
  console.dir(e);
}

Upvotes: 1

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