Get Values Of Columns Not Associated to store Extjs4 - extjs

Question

I have a gridpanel with columns associated to its store (with "dataIndex") and columns not associated to store (without "dataIndex" ) for example:
{
xtype: 'gridcolumn',
renderer: function(value, metaData, record, rowIndex, colIndex, store, view) {
var data=record.getData(true);
if(data.currProbability!==undefined){
if(data.currProbability<5)
return 'L';
else
if((data.currProbability>4)&&(data.currProbability<7))
return 'M';
else return 'H';
}else
return "";
},
text: 'Probability'
},
{
xtype: 'gridcolumn',
renderer: function(value, metaData, record, rowIndex, colIndex, store, view) {
var data=record.getData(true);
if(data.currSeverity!==undefined){
if(data.currSeverity>8)
return 'C';
else
if((data.currSeverity>6)&&(data.Severity<9))
return 'S';
else
if((data.currSeverity>4)&&(data.currSeverity<7))
return 'M';
else
return 'L';
}
return "";
},
text: 'Severity'
}
for these two columns I haven't problem with renderer But the third column:
{
xtype: 'gridcolumn',
renderer: function(value, metaData, record, rowIndex, colIndex, store, view) {
var row=view.getNode(rowIndex);
var data=record.getData(true);
if(row !==undefined){
var severity=Ext.fly(Ext.fly(row).query('.x-grid-cell')[25]).down('div').getHTML();
var probability= Ext.fly(Ext.fly(row).query('.x-grid-cell')[24]).down('div').getHTML();
if(data.status==='Closed')
return severity+probability+'c';
else
return severity+probability;
}
return "";
},
text: 'Risk Class'
}
with this column in its renderer I can't get the value of two later columns ("probability" and "severity") I understood this problem because I get values not from record but from two later columns not associated in the store here like a summury column, In the renderer for this column 'Risk Class' the variable row is indefined.
please how I can resolve it.
Thanx.

Answer 1

Use a calculated field on your model.
fields: [{
name: 'severity',
convert: function(v, record) {
var severity = record.get('currSeverity');
if (severity) {
if (severity > 8) {
return 'C';
}
// etc
}
return '';
}
}]
Then you can use it as a dataIndex directly in your grid. You can also ask the model for the value:
record.get('severity');