Not able to populate combo box label IN EXTJS - extjs4

Question

I am using Extjs 4.2 and I have a combo box field on my page. When I am updating this page, I need to show the selected value in the combo box. If I use static data it will work properly, but when I am loading data from the database then data is coming but it is displaying the value (not the label) for the selected combo box.
I have done the work around by using the select method of the combo box, but I need to iterate the store for getting the selected value. The store value does not start at 1 but starts at 100, and the select method of the combo box uses the index for the list.
Below is the code you can check, but this is not working for multiple combo boxes.
var specilizationComboBox = Ext.getCmp("doctorMasterVO.specilizationFkId");
var specilizationValue = 0;
specilizationStore.each(function (record) {
if (record.get('value') != dataRead.dataVO.doctorMasterVO.specilizationFkId) {
specilizationValue = specilizationValue + 1;
}
else {
return false;
}
});
specilizationComboBox.select(specilizationComboBox.store.data.items[specilizationValue]);
Please tell me there is any other way to do this because iterating over the whole store is not a good idea.

Answer 1

Check out these methods:
find
findBy
findRecord
findExact
Basicly what you want to do is something like this:
var myId = dataRead.dataVO.doctorMasterVO.specilizationFkId;
var record = store.findRecord("id", myId);
specilizationComboBox.select(record);
Where "id" is the name of the field you are trying to find a match for in your store.
Note that myRecord could be null if the record is not there or if the store is not properly loaded.
To make sure the store is loaded you could execute the code above in a load handler:
specilizationComboBox.getStore().load({
scope: this,
callback: function(records, operation, success) {
//code goes here
}
});
If you are not sure if the store has loaded you could check the getCount method.