Mongoose dup key - node.js

Question

I'm getting a duplicate key error and not sure why.
I have the following schema:
var walletSchema = mongoose.Schema({
currencyName : {type : String, required : true, unique : true},
amount : {type : Number, default : 0}
}, {strict : false});
// define the schema for our user model
var userSchema = mongoose.Schema({
local : {
username : { type: String, required: true, unique: true },
password : { type: String, required: true, unique : true },
email : { type: String, required: true, unique: true },
country : { type: String, required: true },
inventory : {
food : { type : Number, default : 0},
energyDrinks : { type : Number, default : 0 }
},
wallet : [walletSchema],
lastAttackedAt : { type: Date, default: Date.now },
lastJobChange : {type: Date, default: '03/30/1988' },
lastWorked : {type: Date},
referredBy : {type : String, default : 'Admin'},
energy : { type: Number, default: 100 },
energyUpdatedAt : { type : Date, default: Date.now },
resetPasswordToken: String,
resetPasswordExpires: Date
}
},{timestamps : true});
I create a new user with this code :
...
newUser.local.username = capitalizeUser(username);
newUser.local.password = newUser.generateHash(password);
newUser.local.email = req.body.email;
newUser.local.country = req.body.country;
newUser.local.wallet.push({
// Create the default currencies
currencyName: 'Euro',
}, {
currencyName: 'Gold',
}, {
currencyName: result.countryCurrency
}
);
// save the user
newUser.save(function(err) {
if (err)
throw err;
return done(null, newUser);
});
Everything works fine for the first user however if I try to make another user I get MongoError: insertDocument :: caused by :: 11000 E11000 duplicate key error index: xyz.users.$local.wallet.currencyName_1 dup key: { : "Euro" }.
Why is this happening, doesn't each user has it's own wallet? How should I handle it, keep in mind that there are about ~230 currencies available for each user.

Answer 1

currencyName : {type : String, required : true}
Remove unique from there and you will be good to go. Mongo checks unique keys for collection. In your case walletSchema collection will have a lot of same values so that's why it's gives error.

Answer 2

As your currencyName has been set unique so it has to be different for each user you save. In fact you with this schema you won't even be able to have two users from the same country.
So to avoid this you need to remove the unique keyword from you schema and it is done. It then looks something like this.
var walletSchema = mongoose.Schema({
currencyName : {type : String, required : true},
amount : {type : Number, default : 0}
}, {strict : false});