diff --git a/doc/api/resources/questions.rst b/doc/api/resources/questions.rst
index 5cc5fa32f3..4f10d49841 100644
--- a/doc/api/resources/questions.rst
+++ b/doc/api/resources/questions.rst
@@ -65,6 +65,7 @@ valid_date_max date Maximum value f
valid_datetime_min datetime Minimum value for date and time questions (optional)
valid_datetime_max datetime Maximum value for date and time questions (optional)
valid_file_portrait boolean Turn on file validation for portrait photos
+valid_string_length_min integer Minimum length for string questions (optional)
valid_string_length_max integer Maximum length for string questions (optional)
dependency_question integer Internal ID of a different question. The current
question will only be shown if the question given in
@@ -130,6 +131,7 @@ Endpoints
"valid_date_max": null,
"valid_datetime_min": null,
"valid_datetime_max": null,
+ "valid_string_length_min": null,
"valid_string_length_max": null,
"valid_file_portrait": false,
"dependency_question": null,
@@ -211,6 +213,7 @@ Endpoints
"valid_datetime_min": null,
"valid_datetime_max": null,
"valid_file_portrait": false,
+ "valid_string_length_min": null,
"valid_string_length_max": null,
"dependency_question": null,
"dependency_value": null,
@@ -315,6 +318,7 @@ Endpoints
"valid_datetime_min": null,
"valid_datetime_max": null,
"valid_file_portrait": false,
+ "valid_string_length_min": null,
"valid_string_length_max": null,
"options": [
{
@@ -399,6 +403,7 @@ Endpoints
"valid_datetime_min": null,
"valid_datetime_max": null,
"valid_file_portrait": false,
+ "valid_string_length_min": null,
"valid_string_length_max": null,
"options": [
{
diff --git a/src/pretix/api/serializers/item.py b/src/pretix/api/serializers/item.py
index b34858c49b..08a83f8cf1 100644
--- a/src/pretix/api/serializers/item.py
+++ b/src/pretix/api/serializers/item.py
@@ -550,7 +550,7 @@ class QuestionSerializer(I18nAwareModelSerializer):
'ask_during_checkin', 'show_during_checkin', 'identifier', 'dependency_question', 'dependency_values',
'hidden', 'dependency_value', 'print_on_invoice', 'help_text', 'valid_number_min',
'valid_number_max', 'valid_date_min', 'valid_date_max', 'valid_datetime_min', 'valid_datetime_max',
- 'valid_string_length_max', 'valid_file_portrait')
+ 'valid_string_length_max', 'valid_string_length_min', 'valid_file_portrait')
def validate_identifier(self, value):
Question._clean_identifier(self.context['event'], value, self.instance)
diff --git a/src/pretix/base/forms/questions.py b/src/pretix/base/forms/questions.py
index 98c3727e28..73cdb2998b 100644
--- a/src/pretix/base/forms/questions.py
+++ b/src/pretix/base/forms/questions.py
@@ -708,6 +708,7 @@ class BaseQuestionsForm(forms.Form):
elif q.type == Question.TYPE_STRING:
field = forms.CharField(
label=escape(q.question), required=required,
+ min_length=q.valid_string_length_min,
max_length=q.valid_string_length_max,
help_text=rich_text(q.help_text),
initial=initial.answer if initial else None,
@@ -715,6 +716,7 @@ class BaseQuestionsForm(forms.Form):
elif q.type == Question.TYPE_TEXT:
field = forms.CharField(
label=escape(q.question), required=required,
+ min_length=q.valid_string_length_min,
max_length=q.valid_string_length_max,
help_text=rich_text(q.help_text),
widget=forms.Textarea,
diff --git a/src/pretix/base/migrations/0310_question_valid_string_length_min.py b/src/pretix/base/migrations/0310_question_valid_string_length_min.py
new file mode 100644
index 0000000000..618f974f7d
--- /dev/null
+++ b/src/pretix/base/migrations/0310_question_valid_string_length_min.py
@@ -0,0 +1,19 @@
+# Generated by Django 5.2.12 on 2026-08-19 11:31
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+ dependencies = [
+ ("pretixbase", "0309_alter_questionanswer_unique_together_and_more"),
+ ]
+
+ operations = [
+ migrations.AddField(
+ model_name="question",
+ name="valid_string_length_min",
+ field=models.PositiveIntegerField(null=True),
+ ),
+ ]
diff --git a/src/pretix/base/models/items.py b/src/pretix/base/models/items.py
index 088c84789c..6d4a5291ad 100644
--- a/src/pretix/base/models/items.py
+++ b/src/pretix/base/models/items.py
@@ -50,7 +50,7 @@ from dateutil.tz import datetime_exists
from django.conf import settings
from django.core.exceptions import ValidationError
from django.core.validators import (
- MaxLengthValidator, MinValueValidator, RegexValidator,
+ MaxLengthValidator, MinLengthValidator, MinValueValidator, RegexValidator,
)
from django.db import models
from django.db.models import Q
@@ -1731,6 +1731,11 @@ class Question(LoggedModel):
valid_datetime_max = models.DateTimeField(null=True, blank=True,
verbose_name=_('Maximum value'),
help_text=_('Currently not supported in our apps and during check-in'))
+ valid_string_length_min = models.PositiveIntegerField(null=True, blank=True,
+ verbose_name=_('Minimum length'),
+ help_text=_(
+ 'Currently not supported in our apps and during check-in'
+ ))
valid_string_length_max = models.PositiveIntegerField(null=True, blank=True,
verbose_name=_('Maximum length'),
help_text=_(
@@ -1885,6 +1890,11 @@ class Question(LoggedModel):
else:
raise ValidationError(_('Unknown country code.'))
elif self.type in (Question.TYPE_STRING, Question.TYPE_TEXT):
+ if self.valid_string_length_min is not None and len(answer) < self.valid_string_length_min:
+ raise ValidationError(MinLengthValidator.message % {
+ 'limit_value': self.valid_string_length_min,
+ 'show_value': len(answer)
+ })
if self.valid_string_length_max is not None and len(answer) > self.valid_string_length_max:
raise ValidationError(MaxLengthValidator.message % {
'limit_value': self.valid_string_length_max,
@@ -1906,6 +1916,8 @@ class Question(LoggedModel):
raise ValidationError(_("The maximum date must not be before the minimum value."))
if self.valid_number_max and self.valid_number_min and self.valid_number_min > self.valid_number_max:
raise ValidationError(_("The maximum value must not be lower than the minimum value."))
+ if self.valid_string_length_max and self.valid_string_length_min and self.valid_string_length_min > self.valid_string_length_max:
+ raise ValidationError(_("The maximum length must not be shorter than the minimum length."))
super().clean()
def clean_type_change(self, old_type, new_type):
diff --git a/src/pretix/control/forms/item.py b/src/pretix/control/forms/item.py
index 1f2fceca1c..b90592ffbd 100644
--- a/src/pretix/control/forms/item.py
+++ b/src/pretix/control/forms/item.py
@@ -251,6 +251,7 @@ class QuestionForm(I18nModelForm):
'valid_date_min',
'valid_date_max',
'valid_file_portrait',
+ 'valid_string_length_min',
'valid_string_length_max',
]
widgets = {
diff --git a/src/pretix/control/templates/pretixcontrol/items/question_edit.html b/src/pretix/control/templates/pretixcontrol/items/question_edit.html
index d241be5651..864b421687 100644
--- a/src/pretix/control/templates/pretixcontrol/items/question_edit.html
+++ b/src/pretix/control/templates/pretixcontrol/items/question_edit.html
@@ -47,6 +47,7 @@
{% bootstrap_field form.valid_datetime_max layout="control" %}
+ {% bootstrap_field form.valid_string_length_min layout="control" %}
{% bootstrap_field form.valid_string_length_max layout="control" %}
diff --git a/src/tests/api/test_items.py b/src/tests/api/test_items.py
index 7b61601f09..aef2ef31fc 100644
--- a/src/tests/api/test_items.py
+++ b/src/tests/api/test_items.py
@@ -2479,6 +2479,7 @@ TEST_QUESTION_RES = {
"valid_datetime_min": None,
"valid_datetime_max": None,
"valid_file_portrait": False,
+ "valid_string_length_min": None,
"valid_string_length_max": None,
"help_text": {"en": "This is an example question"},
"options": [
diff --git a/src/tests/base/test_models.py b/src/tests/base/test_models.py
index 41d9d67ab3..d6b9d12ef1 100644
--- a/src/tests/base/test_models.py
+++ b/src/tests/base/test_models.py
@@ -2970,8 +2970,9 @@ class SeatingTestCase(TestCase):
@pytest.mark.django_db
@pytest.mark.parametrize("qtype,answer,expected", [
- (Question.TYPE_STRING, "a", "a"),
- (Question.TYPE_TEXT, "v", "v"),
+ (Question.TYPE_STRING, "aaa", "aaa"),
+ (Question.TYPE_STRING, "a", "a", ValidationError),
+ (Question.TYPE_TEXT, "vvv", "vvv"),
(Question.TYPE_TEXT, "waaaaay tooooo long", ValidationError),
(Question.TYPE_NUMBER, "0.9", ValidationError),
(Question.TYPE_NUMBER, "1", Decimal("1")),
@@ -3025,6 +3026,7 @@ def test_question_answer_validation(qtype, answer, expected):
valid_datetime_max=datetime.datetime(2018, 1, 16, 16, 0, 0, tzinfo=tzoffset(None, 3600)),
valid_number_min=Decimal('1'),
valid_number_max=Decimal('100'),
+ valid_string_length_min=3,
valid_string_length_max=8,
)
if isinstance(expected, type) and issubclass(expected, Exception):