Validate Peoplepicker column to check if user belongs to a specified group

Question

I have a people picker column "Assigned person" . I need to check on PreSaveAction() that entered user/s belong to a SharePoint group "Project leaders" or not. Any suggestion how do I get this done using javascript?

Answer 1

You check by below code and call CheckCurrentUserMembership() on PreSaveAction()

function CheckCurrentUserMembership() {

var clientContext = new SP.ClientContext.get_current();
var allGroups = currentWeb.get_siteGroups();
clientContext.load(allGroups);

var group = allGroups.getByName("Project leaders");
clientContext.load(group);

var groupUsers = group.get_users();
clientContext.load(groupUsers); 

//var currentUser = clientContext.get_web().get_siteUsers().getById(userID);
clientContext.load(currentUser);

var userGroups = currentUser.get_groups();
clientContext.load(userGroups);
clientContext.executeQueryAsync(OnQuerySucceeded,OnQueryFailed);
}

function OnQuerySucceeded() {
        var userInGroup = false;
        var controlID = $("div[title='AssignedTo']").id;
        var userID=SPClientPeoplePicker.SPClientPeoplePickerDict[controlID].GetAllUserInfo()[0].EntityData.SPUserID
        var groupUserEnumerator = groupUsers.getEnumerator();
        while (groupUserEnumerator.moveNext()) {
            var groupUser = groupUserEnumerator.get_current();
            if (groupUser.get_id() == userID) {
                isMember = true;
                alert('Is a member');
                break;
            }
        }              
  }

function OnQueryFailed() {
      OnResult(false);
 }

Answer 2

There is also a no-code solution to this. You can restrict the people field to fetch values from a particular group only.