EmberJS Error message: Assertion Failed: Cannot find model name - ember.js

Question

I am in the mids of following: Vic Ramon EmberJS tutorial. I reached the point where I am trying to list the leads and have the following setup:
Adapter
App.Store = DS.Store.extend()
App.ApplicationAdapter = DS.ActiveModelAdapter.extend()
DS.RESTAdapter.reopen
namespace: 'api/v1'
Controller
App.LeadsController = Ember.ArrayController.extend
sortProperties: ['firstName', 'lastName']
Model
App.Lead = DS.Model.extend
firstName: DS.attr('string')
lastName: DS.attr('string')
email: DS.attr('string')
phone: DS.attr('string')
status: DS.attr('string', defaultValue: 'new')
notes: DS.attr('string')
fullName: (->
#get('firstName') + ' ' + #get('lastName')
).property('firstName', 'lastName')
Routes
App.LeadsRoute = Ember.Route.extend
model: ->
#store.findAll 'lead'
Router
App.Router.reopen
location: 'auto'
rootURL: '/'
App.Router.map ()->
#resource 'leads', path: '/'
#resource 'lead', path: 'leads/:id'
Template
<article>
<h1>Leads</h1>
<ul>
{{#each lead in controller}}
<li>{{#link-to 'lead' lead}}{{/link-to}}</li>
{{lead.fullName}}
{{/each}}
</ul>
</article>
The issue simply is when I redirect my browser to http://localhost:3000 it shows me the list of fullNames but doesn't show me the anchor links. Also another thing I seem to get in my chrome browser console is:
Error message: Assertion Failed: Cannot find model name
Bonus Question
From reading a few books an tutorials I understand that you can include mixins as a way of injecting additional properties into Controllers or Views. So for example you can do:
Ember.View.extend(App.Editable)
But can you include a mixin into a model? As in can you do:
App.Lead = DS.Model.extend(App.SomeMixin)

Answer 1

Here is working jsbin for Ember 1.12 jsbin.com/mezakepemu/1/edit?html,js,console
1) Links. You could try
<li>
{{#link-to 'lead' lead}}
{{lead.fullName}}
{{/link-to}}
</li>
or
<li>{{link-to lead.fullName 'lead' lead}}</li>
And in modern Ember versions it's better to write
{{#each lead in model}} ... {{/each}}
or
{{#each model as |lead|}} ... {{/each}}
2) Error message: Assertion Failed: Cannot find model name - please show the code where this error is thrown. Your leads route, controller and template looks normal.
3) Yes, mixins can be included in models and in every Ember.Object.