diff --git a/flaschengeist/system/controller/userController.py b/flaschengeist/system/controller/userController.py
index b58cc04..1e33f24 100644
--- a/flaschengeist/system/controller/userController.py
+++ b/flaschengeist/system/controller/userController.py
@@ -20,7 +20,7 @@ def login_user(username, password):
 def update_user(user):
     current_app.config["FG_AUTH_BACKEND"].update_user(user)
     if not user.display_name:
-        user.display_name = user.firstname[0] + user.lastname
+        user.display_name = "{} {}".format(user.firstname, user.lastname)
     db.session.commit()
 
 
diff --git a/flaschengeist/system/models/event.py b/flaschengeist/system/models/event.py
index 09ae7e9..00d8a43 100644
--- a/flaschengeist/system/models/event.py
+++ b/flaschengeist/system/models/event.py
@@ -1,76 +1,65 @@
+from . import ModelSerializeMixin
 from ..database import db
 
 
-class Event(db.Model):
+class Event(db.Model, ModelSerializeMixin):
     """Model for an Event"""
-
     __tablename__ = "event"
     id = db.Column(db.Integer, primary_key=True)
     begin = db.Column(db.DateTime, nullable=False)
     end = db.Column(db.DateTime)
     description = db.Column(db.String(240))
-    kind_id = db.Column(db.Integer, db.ForeignKey("event_kind.id", ondelete="CASCADE"), nullable=False)
     kind = db.relationship("EventKind")
     slots = db.relationship("EventSlot", back_populates="event", cascade="all, delete")
     # notices = db.relationship("EventNotice", back_populates="event")
 
-    def serialize(self):
-        return {"id": self.id, "begin": self.begin, "end": self.end, "description": self.description, "kind": self.kind}
+    _kind_id = db.Column(db.Integer, db.ForeignKey("event_kind.id", ondelete="CASCADE"), nullable=False)
 
 
-class EventKind(db.Model):
+class EventKind(db.Model, ModelSerializeMixin):
     """Model for an EventKind"""
-
     __tablename__ = "event_kind"
     id = db.Column(db.Integer, primary_key=True)
     name = db.Column(db.String(30), nullable=False, unique=True)
 
-    def serialize(self):
-        return {"id": self.id, "name": self.name}
 
-
-class EventSlot(db.Model):
+class EventSlot(db.Model, ModelSerializeMixin):
     """Model for an EventSlot"""
-
     __tablename__ = "event_slot"
     id = db.Column(db.Integer, primary_key=True)
     start = db.Column(db.DateTime)
     end = db.Column(db.DateTime)
-    event_id = db.Column(db.Integer, db.ForeignKey("event.id"), nullable=False)
-    event = db.relationship("Event", back_populates="slots")
     slots = db.relationship("JobSlot", back_populates="event_slot")
 
-    def serialize(self):
-        return {
-            "id": self.id,
-            "start": self.start,
-            "end": self.end,
-            "event": self.event_id,
-        }
+    _event_id = db.Column(db.Integer, db.ForeignKey("event.id"), nullable=False)
+    _event = db.relationship("Event", back_populates="slots")
 
 
-class JobSlot(db.Model):
+class JobSlot(db.Model, ModelSerializeMixin):
     __tablename__ = "job_slot"
     id = db.Column(db.Integer, primary_key=True)
     needed_persons = db.Column(db.Numeric(precision=4, scale=2))
-    event_slot_id = db.Column(db.Integer, db.ForeignKey("event_slot.id"))
-    event_slot = db.relationship("EventSlot", back_populates="slots")
-    kind_id = db.Column(db.Integer, db.ForeignKey("job_kind.id"))
     kind = db.relationship("JobKind")
     jobs = db.relationship("Job", back_populates="slot")
 
+    _event_slot_id = db.Column(db.Integer, db.ForeignKey("event_slot.id"))
+    _event_slot = db.relationship("EventSlot", back_populates="slots")
+    _kind_id = db.Column(db.Integer, db.ForeignKey("job_kind.id"))
 
-class Job(db.Model):
+
+class Job(db.Model, ModelSerializeMixin):
     __tablename__ = "job"
-    id = db.Column(db.Integer, primary_key=True)
-    value = db.Column(db.Numeric(precision=3, scale=2))
-    user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
     user = db.relationship("User")
-    slot_id = db.Column(db.Integer, db.ForeignKey("job_slot.id"))
-    slot = db.relationship("JobSlot")
+    value = db.Column(db.Numeric(precision=3, scale=2))
+
+    _user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
+    _slot_id = db.Column(db.Integer, db.ForeignKey("job_slot.id"))
+    _slot = db.relationship("JobSlot")
+    _id = db.Column(db.Integer, primary_key=True)
 
 
-class JobKind(db.Model):
+class JobKind(db.Model, ModelSerializeMixin):
     __tablename__ = "job_kind"
-    id = db.Column(db.Integer, primary_key=True)
-    name = db.Column(db.String(30))
+    name = db.Column(db.String(30), nullable=False, unique=True)
+
+    _id = db.Column(db.Integer, primary_key=True)