Index: ucs-school-import/modules/ucsschool/importer/models/import_user.py
===================================================================
--- ucs-school-import/modules/ucsschool/importer/models/import_user.py	(Revision 71928)
+++ ucs-school-import/modules/ucsschool/importer/models/import_user.py	(Arbeitskopie)
@@ -80,6 +80,9 @@
 	reader = None
 	logger = None
 	_pyhook_cache = None
+	prop_regex = re.compile(r"<.*?>")
+	prop_providers = dict([(x, "make_{}".format(x)) for x in
+		["birthday", "firstname", "lastname", "email", "recordUID", "school", "sourceUID", "username"]])
 
 	def __init__(self, name=None, school=None, **kwargs):
 		self.action = None            # "A", "D" or "M"
@@ -96,6 +99,7 @@
 			self.logger = get_logger()
 			self.username_max_length = 20 - len(self.ucr.get("ucsschool/ldap/default/userprefix/exam", "exam-"))
 		self._lo = None
+		self._used_methods = defaultdict(list)  # recursion prevention
 		super(ImportUser, self).__init__(name, school, **kwargs)
 
 	def build_hook_line(self, hook_time, func_name):
@@ -641,6 +645,35 @@
 		# force transcription of german umlauts
 		return "<:umlauts>{}".format(scheme)
 
+	def solve_format_dependencies(self, prop_name, scheme):
+		props = self.prop_regex.findall(scheme)
+		for prop in props:
+			if (hasattr(self, prop) and getattr(self, prop) or
+				prop in self.udm_properties and self.udm_properties[prop] or
+				prop == "username" and (self.name or self.udm_properties.get("username"))):
+				# property exists and has value
+				continue
+			if prop == "name":
+				prop = "username"
+			if prop not in self.prop_providers and prop not in self.udm_properties:
+				# nothing we can do
+				continue
+
+			try:
+				meth_name = self.prop_providers[prop]
+			except KeyError:
+				meth_name = "prepare_udm_properties"
+			if meth_name in self._used_methods[prop_name]:
+				# already ran make_<meth_name>() for his formatting job
+				self.logger.warn("Recursion detected when resolving formatting dependecies for %r.", prop_name)
+				self.logger.debug("Tried running %s(), although it has already run for %r.", meth_name, prop_name)
+				continue
+			self._used_methods[prop_name].append(meth_name)
+
+			self.logger.debug("Need property %r to format %r - running %r...", prop, prop_name, meth_name)
+			getattr(self, meth_name)()
+		del self._used_methods[prop_name]
+
 	def format_from_scheme(self, prop_name, scheme, **kwargs):
 		"""
 		Format property with scheme for current import_user.
@@ -658,6 +691,7 @@
 		:param kwargs: dict: additional data to use for formatting
 		:return: str: formatted string
 		"""
+		self.solve_format_dependencies(prop_name, scheme)
 		if self.input_data:
 			all_fields = self.reader.get_data_mapping(self.input_data)
 		else: