Redmine

An exception will be raised if you attempt to add a user to a group if the group is a member without any roles in a certain project. The attempt will fail with the following error.

Completed 422 Unprocessable Entity in 36ms (ActiveRecord: 14.5ms | Allocations: 14551)

ActiveRecord::RecordInvalid (Validation failed: Role cannot be empty):

app/models/group.rb:90:in `block in user_added'
app/models/group.rb:81:in `user_added'
app/controllers/groups_controller.rb:118:in `add_users'
lib/redmine/sudo_mode.rb:61:in `sudo_mode

You can reproduce the error with the following steps:

1. Add a group as a project member with any role
2. Edit the member and clear checkboxes for all roles and save
3. Go to Administration > Groups
4. Add a user to the group. You cannot add a group. The above error will be logged