Dynamic Mongoose Schema based on property - node.js

Question

I have the following user schema (where all distinct properties of different user types are consolidated):
var UserSchema = new mongoose.Schema({
status: String,
firstName: String,
lastName: String,
address: Object,
email: {type: String, lowercase: true, unique: true, required: [true, "can't be blank"], match: [/\S+#\S+\.\S+/, 'is invalid'], index: true},
organization: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Organization' }],
phone: {type: Number, unique: true, required: true, required: [true, "can't be blank"]},
role: String,
hash: String,
salt: String,
deliverySchedule: [{type: String, required: true}]
}
"Common" Schema (what all user types share in common):
var UserSchema = new mongoose.Schema({
status: String,
firstName: String,
lastName: String,
email: {type: String, lowercase: true, unique: true, required: [true, "can't be blank"], match: [/\S+#\S+\.\S+/, 'is invalid'], index: true},
phone: {type: Number, unique: true, required: true, required: [true, "can't be blank"]},
role: String,
hash: String,
salt: String
}
Role = "Customer":
address: [{type: Object, required: true}]
Role = "DeliveryMan":
deliverySchedule: [{type: String, required: true}]
organization: [{ type: mongoose.Schema.Types.ObjectId, required: true,
ref: 'Organization' }],
Role = "Seller":
organization: [{ type: mongoose.Schema.Types.ObjectId, required: true,
ref: 'Organization' }],
I would like to add (and REQUIRE if possible) some fields to the "common" schema based on the user's role. However, I want to store them in the same collection.
How can I add a method to my models/Users.js to add properties to the schema based on "user.role"

Answer 1

Make require validation optional for each role dependent fields.
var UserSchema = new mongoose.Schema({
status: String,
firstName: String,
lastName: String,
email: {type: String, lowercase: true, unique: true, required: [true, "can't be blank"], match: [/\S+#\S+\.\S+/, 'is invalid'], index: true},
phone: {type: Number, unique: true, required: true, required: [true, "can't be blank"]},
role: {type: String, enum: ['Customer', 'DeliveryMan', 'Seller'], required: true},
address: {type: [Object], required: isRequired("address")},
deliverySchedule: {type: [String], required: isRequired("deliverySchedule")},
organization: { type: [mongoose.Schema.Types.ObjectId], ref: 'Organization', required: isRequired("organization")},
hash: String,
salt: String
});
function isRequired(field){
return function(){
if(field == "address"){
return this.role === "Customer"
}
else if(field == "deliverySchedule"){
return this.role === "DeliveryMan"
}
else if(field == "organization"){
return this.role === "Seller" || this.role === "DeliveryMan"
}
}
};