How to dynamically create form.Fields from Stores in ExtJS 4 - forms

Question

I have two stores, Assessor.store.Question and Assessor.store.Choice, along with their respective Models and Proxies. The load data from the server as intended. I also have a Panel, Assessor.view.QuizCards, with a "card" layout. This works fine and I can create dummy cards, Assessor.view.QuestionCard, and navigate through them fine using the Assessor.controller.Quiz controller.
What I need help with is programatically populating my QuizCards panel with questions and choices from the Questions and Choices stores. I've tried just about everything I can think of based on the docs and have had absolutely no success.
Specifically, I want the "value" of the "displayfield" on a QuestionCard to be the "text" property from the Question store/model. The "boxlabel" values in the "radiogroup" should come from the associated Choice store/model.
The detailed code is below. Thanks for any guidance you can provide.
Ext.define('Assessor.controller.Quiz', {
extend: 'Ext.app.Controller',
itemId: 'quizcontroller',
models: ['Question', 'Choice'],
stores: ['Question', 'Choice'],
views: ['QuestionCard'],
// Constants, kinda
NUM_QUESTIONS: 4,
// Custom Functions
/**
* create store instances
*/
createStores: function(){
if (Ext.getStore('questionstore') == null) {
var qs = Ext.create('Assessor.store.Question');
qs.load();
};
if (Ext.getStore('choicestore') == null) {
var cs = Ext.create('Assessor.store.Choice');
cs.load();
};
}, //end createStores
/**
* update buttons
*/
updateButtons: function(){
var index = this.getCardIndex();
var nb = Ext.ComponentQuery.query('#nextbutton')[0];
var pb = Ext.ComponentQuery.query('#prevbutton')[0];
var fb = Ext.ComponentQuery.query('#finishbutton')[0];
if (index<this.NUM_QUESTIONS) {
nb.enable();
fb.disable();
} else {
nb.disable();
fb.enable();
};
if (index>0){
pb.enable();
} else {
pb.disable();
};
}, //end updateButtons
/**
* get active question card index
*/
getCardIndex: function(){
return (Ext.ComponentQuery.query('quizcards')[0].getLayout().activeItem.itemId.split('-')[1]);
},
/**
* set active question card index
*/
setCardIndex: function(index){
Ext.ComponentQuery.query('quizcards')[0].getLayout().setActiveItem('questioncard-'+index);
},
/**
* start the quiz
*/
startQuiz: function(args) {
this.createQuestionCards();
var sb = Ext.ComponentQuery.query('#startbutton')[0];
sb.disable();
this.updateButtons();
},
/**
* create the UI cards with questions from server.
*/
createQuestionCards: function() {
var qc = Ext.ComponentQuery.query('quizcards')[0];
for (i=0; i<this.NUM_QUESTIONS; i++) {
card = Ext.create('Assessor.view.QuestionCard');
card.itemId = 'questioncard-' + i.toString();
qc.add(card);
};
this.updateButtons();
},
/**
* finishQuiz -- finishes and scores the quiz
* #param {Object} args
*/
finishQuiz: function(args) {
this.localState.set('quizFinished', true);
},
//
nextQuestion: function(args) {
console.log('\nnextQuestion');
var cardlayout = Ext.ComponentQuery.query('quizcards')[0].getLayout();
var activeIndex = cardlayout.activeItem.itemId.split('-')[1];
console.log(activeIndex);
if (activeIndex < this.NUM_QUESTIONS) {
activeIndex++;
this.setCardIndex(activeIndex);
};
this.updateButtons();
},
//
prevQuestion: function(args) {
console.log('\nprevQuestion');
var cardlayout = Ext.ComponentQuery.query('quizcards')[0].getLayout();
var activeIndex = cardlayout.activeItem.itemId.split('-')[1];
console.log(activeIndex);
if (activeIndex > 0) {
activeIndex--;
this.setCardIndex(activeIndex);
};
this.updateButtons();
},
//
init: function(){
this.control({
'#nextbutton': {
click: this.nextQuestion
},
'#prevbutton': {
click: this.prevQuestion
},
'#startbutton': {
click: this.startQuiz
},
'#finishbutton': {
click: this.finishQuiz
},
})
}
})
Ext.define('Assessor.view.QuizCards', {
extend: 'Ext.panel.Panel',
alias: 'widget.quizcards',
itemId: 'quizcards',
layout: 'card',
activeItem: 0,
items: []
})
Ext.define('Assessor.view.QuestionCard', {
extend: 'Ext.form.Panel',
alias: 'widget.questioncard',
layout: 'anchor',
items: [{
xtype: 'displayfield',
itemId: 'questionfield',
name: 'questionfield',
fieldLabel: 'Question',
value: ''
}, {
xtype: 'radiogroup',
itemId: 'choicegroup',
columns: 1,
vertical: true,
items: [{
boxLabel: '',
name: 'choice',
value: 1
}, {
boxLabel: (100*Math.random()),
name: 'choice',
value: 2
}, {
boxLabel: (100*Math.random()),
name: 'choice',
value: 3
}]
}]
})
Ext.define('Assessor.store.Question', {
extend: 'Ext.data.Store',
autoLoad: true,
autoSync: true,
model: 'Assessor.model.Question',
storeId: 'questionstore'
})
Ext.define('Assessor.model.Question', {
extend: 'Ext.data.Model',
fields: [
{name: 'id', type: 'int'},
{name: 'text', type: 'string'},
{name: 'resource_uri', type: 'string'}
],
proxy: {
type: 'rest',
url: '/api/v1/question/',
headers: {
'accept':'application/json',
'content-type':'application/json'
},
noCache: false,
reader: {
type: 'json',
root: 'objects',
idAttribute: 'id'
},
writer: {
type: 'json'
}
}
})
Choice model and store are similar, I'll post them if needed. Thanks

Answer 1

What I would suggest for the start is to make Assessor.view.QuestionCard more smart. I would rewrite initComponent there and pass record from the store during construction. This way you would have all logic for creating specific UI elements inside Assessor.view.QuestionCard and would call it something like that:
card = Ext.create('Assessor.view.QuestionCard', {
questionRecord: rec,
lastQuestion: true/false...
... whatever else you need
})