Extjs textfield binding - extjs

Question

I am trying to find the best way to bind items to a textfield in my extjs project. I downloaded the data into a store with one record in the controller. How would I bind to this textfield from the one record? I would preferably bind in the view, not in the controller

Answer 1

You should read this guide to understand better what binding is
The best solution for you is bind the record on the viewmodel of the view, so:
textfield.setBind({
value:'{myRec.valueToRefer}'
})
viewmodel.set('myRec',record.getData());
If you want, you can also use a form to handle this, using form.loadRecord and giving to the textfield a name..
A tip:
set inside the viewmodel a value to null:
data:{
myRec:null
}
Set your record in the viewmodel after setting the bind to the textfield.
Other tip:
If you can, avoid using setBind and prefer to set the binding directly on textfield creation:
//WILL WORK BUT YOU CAN AVOID IT
textfield.setBind({
value:'{myRec.valueToBind}'
})
//YES
var textfield=Ext.create({
xtype:'textfield',
bind:{
value:'{myRec.valueToBind}'
}
});
Refer to Sencha documentation also

Answer 2

You can use bind config to bind the data or any other config for ExtJS component.
Bind setting this config option adds or removes data bindings for other configs.
For example, to bind the title config:
var panel = Ext.create({
xtype: 'panel',
bind: {
title: 'Hello {user.name}'
}
});
To dynamically add bindings:
panel.setBind({
title: 'Greetings {user.name}!'
});
To remove bindings:
panel.setBind({
title: null
});
In this FIDDLE, I have created a demo for biding. I hope this will help/guide you to achieve you requirement.
CODE SNIPPET
Ext.application({
name: 'Fiddle',
launch: function () {
//defining Store
Ext.define('Store', {
extend: 'Ext.data.Store',
alias: 'store.gridstore',
autoLoad: true,
fields: ['name', 'email', 'phone'],
proxy: {
type: 'ajax',
url: 'data1.json',
reader: {
type: 'json',
rootProperty: ''
}
}
});
//defining view model
Ext.define('MyViewModel', {
extend: 'Ext.app.ViewModel',
alias: 'viewmodel.myvm',
data: {
formdata: null
},
stores: {
gridstore: {
type: 'gridstore'
}
}
});
//Controller
Ext.define('MyViewController', {
extend: 'Ext.app.ViewController',
alias: 'controller.myview',
onGridItemClick: function (grid, record) {
//Bind the form data for CLICKED record
this.getViewModel().set('formdata', record)
}
});
//creating panel with GRID and FORM
Ext.create({
xtype: 'panel',
controller: 'myview',
title: 'Binding Example',
renderTo: Ext.getBody(),
viewModel: {
type: 'myvm'
},
layout: 'vbox',
items: [{
xtype: 'grid',
flex: 1,
width: '100%',
bind: '{gridstore}',
columns: [{
text: 'Name',
dataIndex: 'name'
}, {
text: 'Email',
dataIndex: 'email',
flex: 1
}, {
text: 'Phone',
dataIndex: 'phone'
}],
listeners: {
itemclick: 'onGridItemClick'
}
}, {
xtype: 'form',
flex: 1,
width: '100%',
defaults: {
anchor: '100%'
},
title: 'Bind this form on Grid item Click',
bodyPadding:15,
margin: '20 0 0 0',
// The fields
defaultType: 'textfield',
items: [{
fieldLabel: 'Name',
name: 'first',
allowBlank: false,
bind: '{formdata.name}'
}, {
fieldLabel: 'Email',
name: 'email',
allowBlank: false,
bind: '{formdata.email}'
}, {
fieldLabel: 'Phone',
name: 'phone',
allowBlank: false,
bind: '{formdata.phone}'
}]
}]
});
}
});