I'm having trouble submitting radio button values. I have two radio buttons set up like this:

Code:
{
	xtype: 'radio',
	fieldLabel: 'Employment Type',
	boxLabel: 'Documented',
	name: 'employment_type',
	checked: true,
	inputValue: 'documented'
},
{
	xtype: 'radio',
	boxLabel: 'Contracted',
	name: 'employment_type',
	inputValue: 'contracted'
}
I am submitting the form this way using an AJAX call.

Code:
var myParams = { 
	employee: form.getFieldValues()
}	

Ext.Ajax.request({
	url: '/employees',
	jsonData: myParams,
	success: function(result, request){
	...
In the server console I see the parameter passed as shown below, which is wrong.

Code:
"employment_type"=>[false, true]
How I'd like to have the parameter passed:

Code:
"employment_type"=>"documented"