CODEWITHSUNDEEP
mongodbmeteor
Sharjeel Malik
Sharjeel Malik

Reputation: 108

Meteor check whether document already exists in collection or not?

I am beginner in meteor. I have a form having username and password as input fields and a submit button in the end. I have correctly collected data from both fields into two variables. Now what I want is to verify whether any matching document exists in my MongoDB collection or not? My below code is not working. How to do it? Please help. Here is my code.

Template.form.events({
  'submit.login':function(event){
    event.preventDefault();

    var user = document.getElementById("myForm").elements[0].value;;
    var pass = document.getElementById("myForm").elements[1].value;

    var usernamee = (Collection.Login.find({username: user},{password: pass})).count();

    if(usernamee>0) {
      alert("found");
    } else {
      alert("not found");
    }

    return false;
  }
});

Upvotes: 0

Views: 421

Answers (1)

Michel Floyd
Michel Floyd

Reputation: 20256

Firstly your .find() is incorrect:

var usernamee = (Collection.Login.find({username: user},{password: pass})).count();

shoud be:

var usernamee = (Collection.Login.find({username: user, password: pass})).count();

Assuming that you're publishing that collection to the client either with autopublish or an explicit publication.

However:

You are giving even non-logged in users access to the usernames and cleartext passwords of all other users!

Meteor includes the accounts package that takes care of user management for you. You don't need to reinvent the wheel. You want to take advantage of the security work that's already been done for you.

You can use a method call to find out if a username has already been used and warn the new user in the UI before they create their account.

client:

Meteor.call('usernameExists', username, function(err, result){
  if (result) {
    alert('Username '+username+' is already taken!')
    // clear out the form etc...
  }
});

server:

Meteor.methods({
  usernameExists(username){
    return Meteor.users.findOne({username}) !== 'undefined';
  }
});

Upvotes: 1

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