Possible circular reference in mongoose - angularjs

Question

I have a problem with circular dependency when I need to SAVE a 'document'.
My application is all Restfull with the interface via AngularJS.
On the screen to create a COMPANY, you can create OBJECTS and SERVICES. In the creation of the SERVICES screen, it must associate a created OBJECT.
The problem is that the OBJECT created has not yet persisted, so I don't have a _id. Thus it is not possible to reference it in SERVICE. Only when I have an OBJECT persisted, I can associate it in company.services[0].object.
Any suggestion?
This is what I need to be saved in MongoDB. Look at the reference to the OBJECT "5779f75a27f9d259248211c7" in SERVICE.
/* 1 */
{
"_id" : ObjectId("5749bb92bf8145c97988e4a9"),
"name" : "company 1",
"services" : [
{
"_id" : ObjectId("5764cb2c00d00cf10c9c41c6"),
"description" : "service 1",
"object" : ObjectId("5779f75a27f9d259248211c7"),
}
],
"objects" : [
{
"_id" : ObjectId("5779f75a27f9d259248211c7"),
"description" : "object 1",
}
]
}
And this is my Schema:
var objectSchema = new mongoose.Schema({
description: {
type: String,
trim: true,
unique: true,
required: 'Description is required'
}
})
var serviceSchema = new mongoose.Schema({
description: {
type: String,
trim: true,
required: 'Description is required'
},
object: {
type: mongoose.Schema.ObjectId,
ref: 'Object'
},
})
var companySchema = new mongoose.Schema({
name: {
type: String,
default: '',
trim: true,
unique: true,
required: 'Name is required'
},
guarda_documentos: {
services: [serviceSchema],
objects: [objectSchema],
},
});
mongoose.model('Company', companySchema);
mongoose.model('Object', objectSchema);

Answer 1

You would need to persist your object first and once this is done, use the returned _id to then persist your service. This is an async process.
// Simplified code concept
// Create a new object
var o = new Object()
o.description = 'foo'
...
// Create a new service
var s = new Service()
// Save object and return it (will now have an _id)
o.save(function(err, doc) {
// Add object reference to service and save
s.object = doc._id
s.save(function(err, res) {
// Call your controller or whatever callback here
})
})
On another note don't use "Object" as the name of your doc. It already defined in Javascript.