Mongo javascript validation

Question

I am trying to create mongo users using javascript as part of an installation script.

I would like to know how to validate the return statement of the previous command before proceeding with the next.

For example in the following script,

var db = db.getSiblingDB("admin");
var status = db.createUser({user: "root",
  pwd: "root",
  roles: [
    { role: "root", db: "admin" }
  ]
});

I need to verify if db.createUser succeeded before running further commands.

Is it possible? When I tried to print status, console threw undefined type error.

Thanks in advance.

Sergio Tulentsev · Accepted Answer · 2017-03-20 16:20:49Z

2

I need to verify if db.createUser succeeded before running further commands.

By default, you can rely that this particular command succeeded, if you didn't get any error. If it can't add a user (because user with this name already exists), an error will be raised. Something like this:

2017-03-20T19:17:42.097+0300 E QUERY    [thread1] Error: couldn't add user: User "root@admin" already exists :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype.createUser@src/mongo/shell/db.js:1267:15
@(shell):1:14

If you want to be extra sure, look for your newly added user in the output of db.getUsers().

answered Mar 20, 2017 at 16:20

Sergio Tulentsev

231k43 gold badges381 silver badges373 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Nataraj Over a year ago

Is there a way to validate it from within javascript? Can this mongo level error log be caught in the js?

Sergio Tulentsev Over a year ago

@Nataraj Have you tried? It should propagate to client side, yes

Collectives™ on Stack Overflow

Mongo javascript validation

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related