create a dynamic grid in extjs - dynamic

Question

I need to create a dynamic gridpanel in ExtJS . I use an actioncolumn for this:
handler: function(view, rowIndex, colIndex, item, e) {
var tabs = Ext.getCmp('northPanel');
var rec = view.getStore().getAt(rowIndex);
modelFactory(rec.get('Reference'), rec.get('ResultFields'));
console.log(rec.get('ResultFields'));
console.log('start adding tab');
tabs.add({
title: 'Report: ' + rec.get('Reference'),
closable: true,
dockedItems: [{
xtype: 'toolbar',
dock: 'top',
items: [{
xtype: 'tbfill'
}, {
xtype: 'button',
text: 'Export report'
}, {
xtype: 'button',
text: 'Refresh data'
}]
}],
xtype: 'tabpanel',
items: [{
xtype: 'gridpanel',
title: 'Gridview',
forceFit: true,
store: ND.store,
columns: []
}]
});
console.log('tab created');
},
Now I need to create the columns for this grid. The columns I need to make are in the rec.get('ResultFields'). When I use the console.log() I see this in the firebug:
[Object {
name = "currentSimAllocationByCcu", type = "textfield", format = null
}, Object {
name = "wanNumber", type = "textfield", format = null
}, Object {
name = "carrierName", type = "textfield", format = null
}, Object {
name = "dataPackageName", type = "textfield", format = null
}, Object {
name = "simIccid", type = "textfield", format = null
}, Object {
name = "expiryTime", type = "textfield", format = null
}, Object {
name = "bytesRx", type = "textfield", format = null
}, Object {
name = "bytesTx", type = "textfield", format = null
}]
How can I create columns with this?

Answer 1

What seems to be a problem?
If you get information about columns before you create a grid - then create array or columns based on array of your fields. Something like this:
var _cols = [],
_flds = rec.get('ResultFields');
Ext.Array.each(_flds, function(f) {
_cols.push(Ext.create('Ext.grid.column.Column', {
text: f.get('name'),
dataIndex: f.get('name')
}));
});
And then just use that _cols when creating grid.