diff --git a/‎tests/test_objects.py‎
Lines changed: 4 additions & 4 deletions b/‎tests/test_objects.py‎
Lines changed: 4 additions & 4 deletions
diff --git a/‎webuntis/objects.py‎
Lines changed: 28 additions & 3 deletions b/‎webuntis/objects.py‎
Lines changed: 28 additions & 3 deletions
diff --git a/‎webuntis/objects.pyi‎
Lines changed: 11 additions & 0 deletions b/‎webuntis/objects.pyi‎
Lines changed: 11 additions & 0 deletions
@@ -351,7 +351,7 @@ class StubSession(object):
         session=sess
     )
     student1 = webuntis.objects.StudentObject(
-        data={u'id': 9, u'name': u'Potter', u'longName': u'Potter', u'foreName': 'Harry', u'key': 42},
+        data={u'id': 9, u'name': u'Potter', u'longName': u'Potter', u'foreName': 'Harry', u'key': '42'},
         session=sess
     )
 
@@ -609,7 +609,7 @@ def testExamObject(self):
         assert ex.klassen[0].name == u'1A'
         assert len(ex.students) == 1
         assert ex.students[0].name == u'Potter'
-        assert ex.students[0].key == 42
+        assert ex.students[0].key == '42'
 
     def testExamList(selfself):
         exl = webuntis.objects.ExamsList(
@@ -626,10 +626,10 @@ class AbsencesTests(WebUntisTestCase):
     def testAbsence(self):
         ab = webuntis.objects.AbsenceObject(
             data={'date': 20180320, 'startTime': 850, 'endTime': 940,
-                  'studentId': '9',
+                  'studentId': '42',  # <- key!
                   'subjectId': '4',
                   'teacherIds': ['3', '7'],
-                  'student_group': u'MAM_1A_M',
+                  'studentGroup': u'MAM_1A_M',
                   'user': '',
                   'checked': True},
             session=StubSession()
 
@@ -834,11 +834,19 @@ class ExamsList(ListResult):
 
 
 class AbsenceObject(Result):
-    """Represents an absence."""
+    """Represents an absence.
+
+    Attention: if there are multiple teachers/groups at the same time -> multiple entries for the
+    same student, but the absentTime is only set for one (the first?) entry.
+    """
 
     @lazyproperty
     def student(self):
-        return self._session.students(from_cache=True).filter(id=int(self._data[u'studentId']))[0]
+        """
+        doku says: student ID, but it is the students KEY
+        :return:
+        """
+        return self._session.students(from_cache=True).filter(key=self._data[u'studentId'])[0]
 
     @lazyproperty
     def subject(self):
@@ -861,7 +869,10 @@ def teachers(self):
 
     @lazyproperty
     def student_group(self):
-        return self._data[u'student_group']
+        try:
+            return self._data[u'studentGroup']
+        except KeyError:
+            return ''
 
     @lazyproperty
     def checked(self):
@@ -890,6 +901,20 @@ def end(self):
             self._data[u'endTime']
         )
 
+    @lazyproperty
+    def reason(self):
+        try:
+            return self._data[u'absenceReason']
+        except KeyError:
+            return ''
+
+    @lazyproperty
+    def time(self):
+        try:
+            return int(self._data[u'absentTime'])
+        except KeyError:
+            return 0
+
 
 class AbsencesList(ListResult):
     """A list of absences."""
 
@@ -196,6 +196,7 @@ class PeriodList(ListResult):
     def combine(self) -> PeriodList:
         ...
 
+
 class PersonObject(ListItem):
 
     @property
@@ -352,6 +353,7 @@ class SubstitutionList(ListResult):
     def combine(self) -> SubstitutionList:
         ...
 
+
 class TeacherObject(PersonObject):
     @property
     def title(self) -> str:
@@ -468,6 +470,7 @@ class ExamObject(Result):
     def students(self) -> StudentsList:
         ...
 
+
 class ExamsList(ListResult):
     _itemclass = ExamObject
 
@@ -507,6 +510,14 @@ class AbsenceObject(Result):
     def checked(self) -> bool:
         ...
 
+    @property
+    def reason(self) -> str:
+        ...
+
+    @property
+    def time(self) -> int:
+        ...
+
 
 class AbsencesList(ListResult):
     _itemclass = AbsenceObject