diff --git a/advlabdb/models.py b/advlabdb/models.py
index 366c12e..6b57725 100644
--- a/advlabdb/models.py
+++ b/advlabdb/models.py
@@ -683,6 +683,32 @@ class User(db.Model, FsUserMixin):
     admin = db.relationship("Admin", back_populates="user", lazy=False, uselist=False)
     assistant = db.relationship("Assistant", back_populates="user", lazy=True, uselist=False)
 
+    def set_last_semester_as_active(self):
+        """
+        Return True if changed, False otherwise.
+        """
+        last_semester = Semester.lastSemester()
+
+        if last_semester.done:
+            return False
+
+        try:
+            self.active_semester = last_semester
+
+            db.session.commit()
+        except Exception as ex:
+            flash(str(ex), "error")
+
+            db.session.rollback()
+            return False
+        else:
+            flash(
+                f"Active semester changed to {last_semester} because your last active semester was marked as done!",
+                "warning",
+            )
+
+        return True
+
     def str(self):
         return f"{self.first_name} {self.last_name}"
 
diff --git a/advlabdb/routes.py b/advlabdb/routes.py
index 7db5a08..552171e 100644
--- a/advlabdb/routes.py
+++ b/advlabdb/routes.py
@@ -36,22 +36,7 @@ def post_login():
     current_active_semester = current_user.active_semester
 
     if current_active_semester.done:
-        last_semester = Semester.lastSemester()
-
-        if not last_semester.done:
-            try:
-                current_user.active_semester = last_semester
-
-                db.session.commit()
-            except Exception as ex:
-                flash(str(ex), "error")
-
-                db.session.rollback()
-            else:
-                flash(
-                    f"Active semester changed to {last_semester} because the semester {current_active_semester} was marked as done!",
-                    "warning",
-                )
+        current_user.set_last_semester_as_active()
 
     if current_user.has_role("admin"):
         endpoint_base = "admin"