To change a person field in sharepoint that is configured to allow "users and groups" to only allow groups, you need to inject code that changes the picker settings after the page is loaded.
Code below:
$(document).ready(function(){
//wait for the initialisation of the sharepoint script
SP.SOD.executeFunc('sp.js', 'SP.ClientContext', function(){
//call our special function with the field's internal name
SetGroupOnly("myfieldinternalname");
});
});
function SetGroupOnly(fieldName)
{
//make sure there is a control for that field on the page
if($("div[id^='"+fieldName+"_']").length>0)
{
//wait for the initialisation
of the control to finish
WaitForControl("div[id^='"+fieldName+"_'][id$='$ClientPeoplePicker']", function(){
//get the people picker control object
var peoplepicker = SPClientPeoplePicker.SPClientPeoplePickerDict[$("div[id^='"+fieldName+"_'][id$='$ClientPeoplePicker']").attr("id")];
//set the type to SPGroup
peoplepicker.PrincipalAccountType = "SPGroup";
peoplepicker.PrincipalAccountTypeEnum
= 8;
peoplepicker.ResolvePrincipalSource
= 15;
peoplepicker.SearchPrincipalSource = 15;
});
}
}
function WaitForControl(controlSelector,
returnFunction)
{
if($(controlSelector).length>0)
returnFunction();
else
setTimeout(function(){
WaitForControl(controlSelector,returnFunction)},50);
}
