The error is occurring because you already have a schema defined, and then you are defining the schema again. Generally what you should do is instantiate the schema once, and then have a global object call it when it needs it.
For example:
user_model.js
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var userSchema = new Schema({
name:String,
email:String,
password:String,
phone:Number,
_enabled:Boolean
});
module.exports = mongoose.model('users', userSchema);
check.js
var mongoose = require('mongoose');
var User = require('./user_model.js');
var db = mongoose.createConnection('localhost', 'event-db');
db.on('error', console.error.bind(console, 'connection error:'));
var a1= db.once('open',function(){
User.find({},{},function (err, users) {
mongoose.connection.close();
console.log("Username supplied"+username);
//doSomethingHere
})
});
insert.js
var mongoose = require('mongoose');
var User = require('./user_model.js');
mongoose.connect('mongodb://localhost/event-db');
var new_user = new User({
name:req.body.name
, email: req.body.email
, password: req.body.password
, phone: req.body.phone
, _enabled:false
});
new_user.save(function(err){
if(err) console.log(err);
});