Flow

1.templates.hbs

<!--
template: planbook.hbs 
-->

{{render 'dates'}}


<!--
template: dates.hbs
controller: see DatesController below
itemControllers: see DateController below)
-->
{{#each arrangedContent}}
    {{render 'planbook/date' controller.planbookDate}}
{{/each}}


<!--
template: planbook/date.hbs 
model: see PlanbookDate below
-->
{{render 'routine' routine}}

2.controllers-dates.js

var DatesController = Ember.ArrayController.extend({
    init: function(){
        this._super()
        this._loadDates()
    },
    
    _loadDates: function(){
        var range = this._getRange(); // returns array of dates ["2014-02-02", "2014-02-03"]
        var content = range.map(this._createDateController, this)
        this.pushObjects(content)
    },

    _createDateController: function(date){
        return this.container.lookupFactory('controller:date').create({date: date})
    },

})

export default DatesController

3.controllers-date.js

var DateController = Ember.Controller.extend({
    needs: ['dates', 'planbook'],
    planbookDate: function(){
        var id = this.get('controllers.planbook.content.id') + ":" + this.get('date')
        return this.store.modelFor('planbookDate').find(id)
    }.property('content.date', 'controllers.planbook')
})

export default DateController

4.models-planbook-date.js

var PlanbookDate = Ember.Model.extend({
  routine: Ember.belongsTo('routine', {key: 'routineId'}),
})

export default PlanbookDate;

5.models-routine.js

var Routine = Ember.Model.extend({
    parts: Ember.hasMany('part', {embedded: true, key: 'parts'}),
})

export default Routine;