1 files changed, 4 insertions, 0 deletions
diff --git a/kosten/app/forms.py b/kosten/app/forms.py
index 9bab284..818384d 100644
--- a/kosten/app/forms.py
+++ b/kosten/app/forms.py
@@ -31,6 +31,10 @@ class MonthField(HTML4DateField):
 
 req = [validators.input_required()]
 
+def lenOf(col):
+    if hasattr(col.type, 'length') and col.type.length:
+        return [validators.length(max = col.type.length)]
+
 class Form(FlaskForm):
     class Meta:
         locales = False