ensureIndex

[ORESoftware]

I have this code in my app:

 userSchema = mongoose.Schema({
        role: {
            type: String,
            enum: ['Admin', 'Owner', 'User']
        },
        username: {
            type: String,
            unique: true,
            required: true,
            validate: [validation.usernameValidator, 'not a valid username']
        },
        passwordHash: {
            type: String,
            required: true,
            validate: [validation.passwordValidator, 'not a valid password']
        },
        email: {
            type: String,
            unique: true,
            required: true,
            validate: [validation.emailValidator, 'not a valid email address']
        }
    },
        {
            autoIndex:false
        });

var UserModel = null;

var get = function (cb) {

    if(UserModel === null){
        UserModel = mongoDB.model('users', userSchema);
        UserModel.ensureIndexes(function(err){
            if(err){
                console.log(colors.bgRed(err));
            }
            cb(err,UserModel);
        });
    }
    else{
        cb(null,UserModel);
    }
};

two requests from me to you:

(1) can you clarify in the docs what the benefits of setting autoIndex to false?
(2) can you clarify in the docs if ensureIndexes fires once for each index or once for all indexes?

thanks!

[vkarpov15]

1. Sometimes you'd prefer to manage indexes in production via the shell or some other tool. Mongoose is not designed to be a tool for managing mongodb indexes and ensureIndex is a primitive mechanism.
2. Mongoose calls ensureIndex() once for each index sequentially, and then emits an 'index' event on the model when either the index build succeeds or when one of the ensureIndex() calls fails.

[ORESoftware]

thank you!