CODEWITHSUNDEEP
angularjsmongodbloopbackjs
Tim Geerts
Tim Geerts

Reputation: 321

How do I create a correct hasOne relation between two objects with loopback and angular

I've recently started to code in angular as the frontend code and was planning to use loopback (www.loopback.io) as my backend (with a mongodb for my storage).
Now, as a basic idea I'm just creating a login form and register form and will go on from there. Yet, I can't seem to get my models correct, especially the relations between them.

I'd like a user model for the basic username/password stuff, and a person model where I can store more info like firstname, lastname, and more.
I'm currently using the "default" User model that you get out of the box and created a person model with the needed properties.
What I can't get correct though, is the link between the two (a one to one relation, so the HasOne relation).

These are my models:

user.json

{
  "name": "user",
  "base": "User",
  "idInjection": true,
  "properties": {},
  "validations": [],
  "relations": {
    "person": {
      "type": "hasOne",
      "model": "Person",
      "foreignKey": "id"
    }
  },
  "acls": [],
  "methods": []
}

person.json

{
  "name": "Person",
  "plural": "Person",
  "base": "PersistedModel",
  "idInjection": true,
  "properties": {
    "FirstName": {
      "type": "string",
      "required": true
    },
    "LastName": {
      "type": "string",
      "required": true
    }
  },
  "validations": [],
  "relations": {},
  "acls": [],
  "methods": []
}

my register function
(I'm using the automaticaly generated lb-services file you can extract with the angular SDK provided by loopback, that's why you just see stuff like "User.create" in stead of a "real" api call)

function register(email, password, firstname, lastname) {
      var usr = User.create({
          email: email,
          password: password
        }).$promise;

      var prs = usr.person.create({
        firstname: firstname,
        lastname: lastname
      });
      return usr;
    }

There's bound to be a bunch of stuff wrong here, I just don't know what. The user gets created in the database, yet I can't seem to instantly also create a "person" object and link that to the newly created user.

Any help is appreciated, cause I can't seem to find that many resources online that use angular and loopback with the generated lb-services file...

Upvotes: 2

Views: 944

Answers (1)

IvanZh
IvanZh

Reputation: 2290

Seems that you reference undefined property person of usr instance.

Create person using User resource, in success callback:

function register(email, password, firstname, lastname) {
      var usr = User.create({
          email: email,
          password: password
        }, function() {
          User.person.create({ userId: usr.id }, {
            firstname: firstname,
            lastname: lastname 
          }, function(person) {
            console.log('Persone created:', persone)
          })         
        });

      return usr;
    }

Upvotes: 1

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