Is it possible to share user group (with itself) using Apex Sharing?

Question

Objective is to share a 'User Group' with itself. Following code works fine to share a 'User' with a 'User Group', but not for sharing 'User Group'.

  UserShare groupShr = new UserShare();
  groupShr.UserId = toShareId;//works for ID of User, not for ID of User Group
  groupShr.UserOrGroupId = spaceGroupId;
  groupShr.UserAccessLevel = 'Read';
  groupShrList.add(groupShr);

  insert groupShrList;

Exception thrown if above code tries to share user group is FIELD_INTEGRITY_EXCEPTION, User ID: id value of incorrect type: 00GF0000004ucwlMAA: [UserId]: Trigger.TriggerName: line 30, column 1

Is it possible to share user group?

Answer 1

The documentation clearly states that the userId has to be the Id of the user being shared. So you cannot set it to the groupId.

The other work around is: you get the users in the group, then itereate thru all the users and then share the records.