59 def clean_existing_user_not_equal_to_current(field_name):

    60   """Check if the field_name field is a valid user and is not 

    61      equal to the current user.

    62   """

    63 

    64   def wrapped(self):

    65     

    66     clean_user_field = clean_existing_user(field_name)

    67     user_entity = clean_user_field(self)

    68     

    69     current_user_entity = user_logic.logic.getForCurrentAccount()

    70     

    71     if user_entity.key() == current_user_entity.key():

    72       # users are equal

    73       raise forms.ValidationError("You cannot enter yourself here")

    74     

    75     return user_entity

    76   return wrapped

    77