Javascript - Dynamic function for Mongoose queries

Question

I am looking to do some registration form validation that when submitted it checks the database for existing data matches.

// Check if username is available or not
var existsInDatabase = function(field, value){
  console.log('Working with: ', field + ' ' + value); // Console logs the appropriate fields & values
  User.find({ field : value }, function(err, docs){
    if(docs){
      console.log(docs); // console.log shows []
    }
  });
};

If change my User.find() query to have the variables I am passing into the function it pulls finds the resource in Mongo.

Thanks in advance for any help/guidance.

Arun Ghosh · Accepted Answer · 2016-07-28 17:26:24Z

2

You can try:

  var query = {};
  query[field] = value;
  User.find(query, function(err, docs){
    if(docs){
      console.log(docs); // console.log shows []
    }
  });

And if you are using ES6, you can:

  User.find({ [field] : value }, function(err, docs){
    if(docs){
      console.log(docs); // console.log shows []
    }
  });

answered Jul 28, 2016 at 17:26

Arun Ghosh

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