CODEWITHSUNDEEP
javascriptember.js
joscas
joscas

Reputation: 7674

How to retrieve all properties of an Ember.js model

I'm working with forms in Ember.js and I want to retrieve a list of all model properties so that I can take snapshots of the state of the form at different moments. Is there a way to get a list of all properties of a model?

For example, if my model is:

App.User = DS.Model.extend({
  name: DS.attr('string'),
  email: DS.attr('string'),
  current_password: DS.attr('string'),
  password: DS.attr('string'),
  password_confirmation: DS.attr('string'),
  admin: DS.attr('boolean'),
}

Then I would like to have something like this:

> getEmberProps('User')

["name", "email", "current_password", "password", "password_confirmation", "admin"]

Upvotes: 11

Views: 15439

Answers (5)

mistahenry
mistahenry

Reputation: 8724

in 2018: use Ember Data's eachAttribute.

So, given a model Foo:

import Model from 'ember-data/model';
import attr from 'ember-data/attr';

export default Model.extend({
    "name": attr('string'),
    "status": attr('string')
});

Let's get the model's definition via the constructor:

var record = this.store.createRecord('foo', {
    name: "model1",
    status: "status1"
});
this.modelClass = record.constructor;

and invoke a function for each of its Ember Data attributes:

modelClass.eachAttribute(function(key, meta){ 
   //meta provides useful information about the attribute type
}

Upvotes: 0

piotrze
piotrze

Reputation: 489

You can simply use toJSON method on model and get the keys from object.

Ember.keys(model.toJSON())

Note that will not return you keys for relations.

Upvotes: 20

Michael
Michael

Reputation: 12011

You can also use this:
http://emberjs.com/api/data/classes/DS.Model.html#property_attributes http://emberjs.com/api/data/classes/DS.Model.html#method_eachAttribute

Ember.get(App.User, 'attributes').map(function(name) { return name; });
Ember.get(userInstance.constructor, 'attributes').map(function(name) { return name; });

There's also similar properties for relationships too.

Upvotes: 7

calcsam
calcsam

Reputation: 301

An easy way to print out the fields and their values:

Ember.keys(model.toJSON()).forEach(function(prop) { console.log(prop + " " + model.get(prop)); } )

Upvotes: 4

mavilein
mavilein

Reputation: 11668

There is no easy way, but you could try a custom mixin like this:

Ember.AllKeysMixin = Ember.Mixin.create({
    getKeys: function() {
        var v, ret = [];
        for (var key in this) {
            if (this.hasOwnProperty(key)) {
                v = this[key];
                if (v === 'toString') {
                    continue;
                } // ignore useless items
                if (Ember.typeOf(v) === 'function') {
                    continue;
                }
                ret.push(key);
            }
        }
        return ret
    }
});

You can use it like this:

App.YourObject = Ember.Object.extend(Ember.AllKeysMixin, {
 ... //your stuff
});
var yourObject = App.YourObject.create({
  foo : "fooValue";
});
var keys = yourObject.getKeys(); // should be ["foo"];

Upvotes: 0

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