Sample Mongoose Schema for a user

user.js

// Sample Mongoose User Schema with a schema plugin

var mongoose = require("mongoose")
  , Schema = mongoose.Schema
  , lastModified = require("./plugins/lastModified")
  , Validator = require("./validator").Validator
  , validator = new Validator()
  , User;

// define the schema
var schema = new Schema({
  email: {
    type: String,
    validate: validator.isEmail(),
    unique: true
  },
  firstName: {
    type: String,
    validate: validator.isAlphanumeric()
  },
  lastName: {
    type: String,
    validate: validator.isAlphanumeric()
  },
  parentCompany: {
    type: Schema.Types.ObjectId,
    ref: "companies"
  },
  password: {
    type: String
  },
  securityAnswer: {
    type: String
  },
  securityQuestion: {
    type: String
  }
});

// this plugin is custom and automatically adds 
// properties for createdOn, and modifiedOn dates to the schema and can
// be resued for successive model schemas
schema.plugin(lastModified);

schema.methods.changePassword = function(oldPassword, newPassword) {
  if (!oldPassword || oldPassword.trim().length === 0) {
    return this.invalidate("password",  "Old password required");
  }

  if (!newPassword || newPassword.trim().length === 0) {
    return this.invalidate("password", "required");
  }

  if (oldPassword !== this.password)) {
    return this.invalidate("password",  "Your old password is incorrect");
  }

  this.password = newPassword;
};

// an instance method on the model. schema.statics can be used to create static methods
// statics are accesed like: User.myStaticMethod() without instantiating a User object
schema.methods.getCoworkers = function(callback) {
  return this.model("users")
         .find({ parentCompany: this.parentCompany })
         .sort({ email:"asc" })
         .exec(callback);
};

// and example of a virtual property that does not persist in the database but can be accessed on user.fullName
schema.virtual("fullName").get(function() {
  return this.firstName + " " + this.lastName;
});

// what to do after a save()
schema.post("save", function() {
  console.log("saved user " + this.email);
});

User = module.exports = mongoose.model("users", schema);

// what to do on an error
User.on("error", function(err) {
  console.log("Error saving user: " + err);
});