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POHow do I load sub-models with a foreign key relationship in Backbone.js?
 

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  1. POHow do I load sub-models with a foreign key relationship in Backbone.js?
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    <p>Sorry if this is a bit convoluted... I am still learning Backbone.js...</p> <p>What is the proper way to load &amp; save Backbone models that have sub-models within themselves? (And should I even be having sub-models?)</p> <p>For example, (pardon the coffeescript), if I have something like:</p> <pre><code>class Address extends Backbone.Model urlRoot: '/api/v1/address/' url: -&gt; return @urlRoot+@id+'/?format=json' defaults: {'city': '', 'state': ''} class Person extends Backbone.Model urlRoot: '/api/v1/person/' url: -&gt; return @urlRoot+@id+'/?format=json' defaults: { name: 'Anon', address: new Address } ... and then I do this ... dude = new Person dude.set('id',101) dude.fetch() // Response returns {name: 'The Dude', address: '/api/v1/address/1998/'} // And now, dude.get('address') is '/api/v1/address/1998' and no Address object where = new Address where.set('id',1998) where.fetch() // Response returns {city: 'Venice', state; 'CA'} </code></pre> <p><strong>What I want</strong> is to say dude.fetch() and for it to get both the dude and his address, and when I call Backbone.sync('update',dude), I want to save both the dude and his address. How?</p> <p>On the backend, I am using tastypie to construct my api for some SQLAlchemy tables (not Django's ORM), and so I have a resource for my Person table and Address table:</p> <pre><code>class AddressResource(SQLAlchemyResource): class Meta: resource_name = 'address' object_class = AddressSQLAlchemyORMClass class PersonResource(SQLAlchemyResource): address = ForeignKey(AddressResource, 'address') class Meta: resource_name = 'person' object_class = PersonSQLAlchemyORMClass </code></pre> <p>Tastypie's <a href="http://django-tastypie.readthedocs.org/en/latest/interacting.html" rel="nofollow noreferrer">ForeignKey</a> function creates a mapping that returns <strong>the URL</strong> to the address in question.</p> <p>I tried overloading the Dude.parse() function to call fetch for the Address(), but it wasn't working and it felt wrong, and it raised all sorts of questions:</p> <ol> <li>Should I be modifying my tastypie response to include the Address as a nested object?</li> <li>If I change to a nested object, should I be use <a href="https://github.com/PaulUithol/Backbone-relational/" rel="nofollow noreferrer">backbone-relational</a>, as in the question <a href="https://stackoverflow.com/questions/11316782/backbone-relational-related-models-not-being-created">Backbone-Relational related models not being created</a>, or is that overkill?</li> <li>Should I be <a href="http://paltman.com/2012/04/30/integration-backbonejs-tastypie/" rel="nofollow noreferrer">overloading the parse()</a> or fetch() function or creating my own backbone.Sync() to get the response and then do this manually?</li> <li>Since it is one-to-one, should I instead just have one model, instead of a sub-model, and send the information back forth together in one request?</li> </ol> <p>Is there a standard way of doing this?</p>
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