def create_userprop(p_key, p_value, user_id, modifier_id):
if strutil.is_empty(p_key):
raise CoreError("user prop key can't be empty.")
query = UserProp.all()
query.filter("p_key =", p_key)
query.filter("user_id =", user_id)
if query.count() > 0:
raise CoreError("the prop key %s of the user %d has existed." % (p_key, user_id))
userprop = UserProp()
userprop.p_key = p_key
p_value = strutil.to_str(p_value)
userprop.p_value = p_value
userprop.user_id = user_id
userprop.create(modifier_id)
return userprop
