# Improves form date checking

* adds validator to make sure no dates like `01.01.1` can be accepted. All dates must be somewhat later than 01.01.1950

konova/utils/validators.py

@@ -0,0 +1,28 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: ksp-servicestelle@sgdnord.rlp.de
+Created on: 17.05.23
+
+"""
+from datetime import datetime
+
+from django.core.exceptions import ValidationError
+from django.utils.translation import gettext_lazy as _
+
+
+def reasonable_date(value):
+    """ Validator which checks that no dates like "01.01.1" can be entered
+
+    Args:
+        value ():
+
+    Returns:
+
+    """
+    min_date = datetime.fromisoformat("1950-01-01").date()
+    if value < min_date:
+        raise ValidationError(
+            _("This date is unrealistic. Please enter the correct date (>1950)."),
+            params={"value": value},
+        )