is there a way to declare a Model schema in mongoose so that when the model is new'ed the _id field would auto-generate?
for example:
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var ObjectIdSchema = Schema.ObjectId;
var ObjectId = mongoose.Types.ObjectId;
var PersonSchema = new Schema({
_id: ObjectIdSchema,
firstName: {type: String, default: 'N/A'},
lastName: {type: String, default: 'N/A'},
age: {type: Number, min: 1}
});
var Person = mongoose.model('Person', PersonSchema);
at first, i thought great!, i'll just do
_id: {type:ObjectIdSchema, default: new ObjectId()}
but of course that doesn't work, because new ObjectId() is only called on initialize of schema. so calling new Persion() twice creates two objects with the same _id value.
so is there a way to do it so that every time i do "new Person()" that a new ObjectId() is generated?
the reason why i'm trying to do this is because i need to know the value of the new person's _id value for further processing.
i also tried:
var person = new Person({firstName: "Joe", lastName: "Baz"});
person.save(function(err, doc, num){
console.log(doc._id);
});
even then, doc doesn't contain the ObjectId. but if i look in the database, it does contain it.
p.s. i'm using mongoose 2.7.1
p.p.s. i know i can manually create the ObjectId when creating the person as such:
var person = new Person({_id: new ObjectId(), firstName: "Joe", lastName: "Baz"});
but i rather not have to import ObjectId and have to new it every time i want to new a Person. guess i'm used to using the java driver for mongodb, where i can just create the value for the _id field in the Model constructor.
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