add Questionnaire and QuestionnaireChild models and their API; migrate existing data

src/pretix/api/serializers/item.py

@@ -51,6 +51,7 @@ from pretix.base.models import (
     ItemVariation, ItemVariationMetaValue, Question, QuestionOption, Quota,
     SalesChannel,
 )
+from pretix.base.models.items import Questionnaire, QuestionnaireChild
 
 
 class InlineItemVariationSerializer(SalesChannelMigrationMixin, I18nAwareModelSerializer):
@@ -624,6 +625,160 @@ class QuestionSerializer(I18nAwareModelSerializer):
         return question
 
 
+class QuestionRefField(serializers.PrimaryKeyRelatedField):
+    def to_representation(self, qc):
+        if not qc:
+            return None
+        elif qc.system_question:
+            return qc.system_question
+        elif qc.user_question_id:
+            return qc.user_question_id
+        else:
+            return None
+
+    def to_internal_value(self, data):
+        if type(data) == int:
+            return {'user_question': super().to_internal_value(data), 'system_question': None}
+        elif type(data) == str or data is None:
+            return {'user_question': None, 'system_question': data}
+        else:
+            self.fail('incorrect_type', data_type=type(data).__name__)
+
+    def use_pk_only_optimization(self):
+        return self.source == '*'
+
+
+class InlineQuestionnaireChildSerializer(I18nAwareModelSerializer):
+    question = QuestionRefField(source='*', queryset=Question.objects.none())
+    dependency_question = QuestionRefField(allow_null=True, required=False, queryset=Question.objects.none())
+
+    class Meta:
+        model = QuestionnaireChild
+        fields = ('question', 'required', 'label', 'help_text', 'dependency_question', 'dependency_values')
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields["question"].queryset = self.context["event"].questions.all()
+        self.fields["dependency_question"].queryset = self.context["event"].questions.all()
+
+    def validate(self, data):
+        data = super().validate(data)
+        event = self.context['event']
+
+        full_data = self.to_internal_value(self.to_representation(self.instance)) if self.instance else {}
+        full_data.update(data)
+
+        if full_data.get('ask_during_checkin') and full_data.get('dependency_question'):
+            raise ValidationError('Dependencies are not supported during check-in.')
+
+        dep = full_data.get('dependency_question')
+        if dep:
+            if dep.ask_during_checkin:
+                raise ValidationError(_('Question cannot depend on a question asked during check-in.'))
+
+            seen_ids = {self.instance.pk} if self.instance else set()
+            while dep:
+                if dep.pk in seen_ids:
+                    raise ValidationError(_('Circular dependency between questions detected.'))
+                seen_ids.add(dep.pk)
+                dep = dep.dependency_question
+
+        return data
+
+    def validate_dependency_question(self, value):
+        if value:
+            if value.type not in (Question.TYPE_CHOICE, Question.TYPE_BOOLEAN, Question.TYPE_CHOICE_MULTIPLE):
+                raise ValidationError('Question dependencies can only be set to boolean or choice questions.')
+            if value == self.instance:
+                raise ValidationError('A question cannot depend on itself.')
+        return value
+
+
+class QuestionnaireSerializer(I18nAwareModelSerializer):
+    limit_sales_channels = serializers.SlugRelatedField(
+        slug_field="identifier",
+        queryset=SalesChannel.objects.none(),
+        required=False,
+        allow_empty=True,
+        many=True,
+    )
+
+    class Meta:
+        model = Questionnaire
+        fields = ('id', 'type', 'internal_name', 'items', 'position', 'all_sales_channels', 'limit_sales_channels', 'children')
+
+    def __init__(self, *args, **kwargs):
+        self.fields['children'] = InlineQuestionnaireChildSerializer(many=True, required=True, context=kwargs['context'], partial=False)
+        super().__init__(*args, **kwargs)
+
+    def validate(self, data):
+        data = super().validate(data)
+        event = self.context['event']
+
+        #full_data = self.to_internal_value(self.to_representation(self.instance)) if self.instance else {}
+        #full_data.update(data)
+
+        #if full_data.get('ask_during_checkin') and full_data.get('dependency_question'):
+        #    raise ValidationError('Dependencies are not supported during check-in.')
+
+        #if full_data.get('ask_during_checkin') and full_data.get('type') in Question.ASK_DURING_CHECKIN_UNSUPPORTED:
+        #    raise ValidationError(_('This type of question cannot be asked during check-in.'))
+
+        #if full_data.get('show_during_checkin') and full_data.get('type') in Question.SHOW_DURING_CHECKIN_UNSUPPORTED:
+        #    raise ValidationError(_('This type of question cannot be shown during check-in.'))
+
+        #Question.clean_items(event, full_data.get('items') or [])
+        return data
+
+    def validate_children(self, value):
+        prev_questions = {}
+        for child in value:
+            if child.get('dependency_question'):
+                if (child['dependency_question']['user_question'] or child['dependency_question']['system_question']) not in prev_questions:
+                    raise ValidationError('A question can only depend on a previous question from the same questionnaire.')
+
+            if child['user_question']:
+                prev_questions[child['user_question']] = child
+            if child['system_question']:
+                prev_questions[child['system_question']] = child
+        return value
+
+    @transaction.atomic
+    def create(self, validated_data):
+        children_data = validated_data.pop('children') if 'children' in validated_data else []
+        questionnaire = super().create(validated_data)
+        self.set_children(questionnaire, children_data)
+        return questionnaire
+
+    @transaction.atomic
+    def update(self, instance, validated_data):
+        children_data = validated_data.pop('children', None)
+        questionnaire = super().update(instance, validated_data)
+        if children_data is not None:
+            self.set_children(questionnaire, children_data)
+        return questionnaire
+
+    def set_children(self, questionnaire, new_data):
+        result = []
+        child_serializer = self.fields['children'].child
+        existing = questionnaire.children.all()
+        for i, d in enumerate(new_data):
+            d['questionnaire'] = questionnaire
+            d['position'] = i + 1
+            d.setdefault('required', False)
+            d.setdefault('help_text', None)
+            d.setdefault('dependency_question', None)
+            d.setdefault('dependency_values', None)
+        updatable = min(len(existing), len(new_data))
+        for i in range(0, updatable):
+            result.append(child_serializer.update(existing[i], new_data[i]))
+        for i in range(updatable, len(new_data)):
+            result.append(child_serializer.create(new_data[i]))
+        for i in range(updatable, len(existing)):
+            existing[i].delete()
+        return result
+
+
 class QuotaSerializer(I18nAwareModelSerializer):
     available = serializers.BooleanField(read_only=True)
     available_number = serializers.IntegerField(read_only=True)

src/pretix/api/urls.py

@@ -79,7 +79,8 @@ event_router.register(r'subevents', event.SubEventViewSet)
 event_router.register(r'clone', event.CloneEventViewSet)
 event_router.register(r'items', item.ItemViewSet)
 event_router.register(r'categories', item.ItemCategoryViewSet)
-event_router.register(r'questions', item.QuestionViewSet)
+event_router.register(r'datafields', item.QuestionViewSet)
+event_router.register(r'questionnaires', item.QuestionnaireViewSet)
 event_router.register(r'discounts', discount.DiscountViewSet)
 event_router.register(r'quotas', item.QuotaViewSet)
 event_router.register(r'vouchers', voucher.VoucherViewSet)

src/pretix/api/views/item.py

@@ -47,13 +47,14 @@ from pretix.api.pagination import TotalOrderingFilter
 from pretix.api.serializers.item import (
     ItemAddOnSerializer, ItemBundleSerializer, ItemCategorySerializer,
     ItemProgramTimeSerializer, ItemSerializer, ItemVariationSerializer,
-    QuestionOptionSerializer, QuestionSerializer, QuotaSerializer,
+    QuestionOptionSerializer, QuestionSerializer, QuestionnaireSerializer, QuotaSerializer,
 )
 from pretix.api.views import ConditionalListView
 from pretix.base.models import (
     CartPosition, Item, ItemAddOn, ItemBundle, ItemCategory, ItemProgramTime,
     ItemVariation, Question, QuestionOption, Quota,
 )
+from pretix.base.models.items import Questionnaire
 from pretix.base.services.quotas import QuotaAvailability
 from pretix.helpers.dicts import merge_dicts
 from pretix.helpers.i18n import i18ncomp
@@ -538,6 +539,51 @@ class QuestionOptionViewSet(viewsets.ModelViewSet):
         super().perform_destroy(instance)
 
 
+class QuestionnaireViewSet(ConditionalListView, viewsets.ModelViewSet):
+    serializer_class = QuestionnaireSerializer
+    queryset = Questionnaire.objects.none()
+    #filter_backends = (DjangoFilterBackend, TotalOrderingFilter)
+    #filterset_class = QuestionFilter
+    ordering_fields = ('id', 'position')
+    ordering = ('position', 'id')
+    permission = None
+    write_permission = 'event.items:write'
+
+    def get_queryset(self):
+        return self.request.event.questionnaires.prefetch_related('children').all()
+
+    def perform_create(self, serializer):
+        serializer.save(event=self.request.event)
+        serializer.instance.log_action(
+            'pretix.event.questionnaire.added',
+            user=self.request.user,
+            auth=self.request.auth,
+            data=self.request.data
+        )
+
+    def get_serializer_context(self):
+        ctx = super().get_serializer_context()
+        ctx['event'] = self.request.event
+        return ctx
+
+    def perform_update(self, serializer):
+        serializer.save(event=self.request.event)
+        serializer.instance.log_action(
+            'pretix.event.questionnaire.changed',
+            user=self.request.user,
+            auth=self.request.auth,
+            data=self.request.data
+        )
+
+    def perform_destroy(self, instance):
+        instance.log_action(
+            'pretix.event.questionnaire.deleted',
+            user=self.request.user,
+            auth=self.request.auth,
+        )
+        super().perform_destroy(instance)
+
+
 class NumberInFilter(django_filters.BaseInFilter, django_filters.NumberFilter):
     pass
 

src/pretix/base/migrations/0299_questionnaire_questionnairechild.py

@@ -0,0 +1,162 @@
+# Generated by Django 4.2.29 on 2026-03-19 14:24
+import json
+from collections import namedtuple
+from itertools import chain, groupby
+
+from django.db import migrations, models
+import django.db.models.deletion
+import i18nfield.fields
+from i18nfield.strings import LazyI18nString
+
+import pretix.base.models.base
+import pretix.base.models.fields
+
+
+FakeQuestion = namedtuple(
+    'FakeQuestion', 'id question position required'
+)
+
+
+def get_fake_questions(settings):
+    def b(s):
+        return s == 'True'
+    fq = []
+    sqo = json.loads(settings.get('system_question_order', '{}'))
+    _ = LazyI18nString.from_gettext
+
+    if b(settings.get('attendee_names_asked', 'True')):
+        fq.append(FakeQuestion('attendee_name_parts', _('Attendee name'), sqo.get('attendee_name_parts', 0), b(settings.get('attendee_names_required'))))
+
+    if b(settings.get('attendee_emails_asked')):
+        fq.append(FakeQuestion('attendee_email', _('Attendee email'), sqo.get('attendee_email', 0), b(settings.get('attendee_emails_required'))))
+
+    if b(settings.get('attendee_company_asked')):
+        fq.append(FakeQuestion('company', _('Company'), sqo.get('company', 0), b(settings.get('attendee_company_required'))))
+
+    if b(settings.get('attendee_addresses_asked')):
+        fq.append(FakeQuestion('street', _('Street'), sqo.get('street', 0), b(settings.get('attendee_addresses_required'))))
+        fq.append(FakeQuestion('zipcode', _('ZIP code'), sqo.get('zipcode', 0), b(settings.get('attendee_addresses_required'))))
+        fq.append(FakeQuestion('city', _('City'), sqo.get('city', 0), b(settings.get('attendee_addresses_required'))))
+        fq.append(FakeQuestion('country', _('Country'), sqo.get('country', 0), b(settings.get('attendee_addresses_required'))))
+    return fq
+
+
+def migrate_questions_forward(apps, schema_editor):
+    Event = apps.get_model("pretixbase", "Event")
+    Item = apps.get_model("pretixbase", "Item")
+    Question = apps.get_model("pretixbase", "Question")
+    Questionnaire = apps.get_model("pretixbase", "Questionnaire")
+    QuestionnaireChild = apps.get_model("pretixbase", "QuestionnaireChild")
+    EventSettingsStore = apps.get_model('pretixbase', 'Event_SettingsStore')
+
+    for event in Event.objects.iterator():
+        # get relevant settings
+        settings = {
+            setting.key: setting.value for setting in EventSettingsStore.objects.filter(object_id=event.id, key__in=(
+                'system_question_order', 'attendee_names_asked', 'attendee_names_required', 'attendee_emails_asked', 'attendee_emails_required',
+                'attendee_company_asked', 'attendee_company_required', 'attendee_addresses_asked', 'attendee_addresses_required',
+            ))
+        }
+
+        # get all questions (user-defined and system provided), along with the products for which they're asked
+        questions = event.questions.all()
+        children = sorted(chain((
+            (item, q.position, q.id, q)
+            for q in questions
+            for item in q.items.values_list('id', 'internal_name', 'name')
+        ), (
+            (item, q.position, None, q)
+            for q in get_fake_questions(settings)
+            for item in event.items.filter(personalized=True).values_list('id', 'internal_name', 'name')
+        )), key=lambda t: (t[0], t[1], t[2]))
+
+        # group by item, creating a unique questionnaire per item
+        item_questionnaires = (([t[3] for t in children], item_id) for item_id, children in groupby(children, key=lambda t: t[0]))
+
+        # group again, merging all questionnaires with identical children
+        merged_questionnaires = groupby(sorted(item_questionnaires, key=lambda t: [q.id for q in t[0]]), key=lambda t: t[0])
+        for children, iterator in merged_questionnaires:
+            items = [item for _c, item in iterator]
+
+            # create questionnaires and children
+            questionnaire = Questionnaire.objects.create(
+                event=event, type='PS', position=0, all_sales_channels=True,
+                internal_name=', '.join(str(iname or name) for (id, iname, name) in items)
+            )
+            questionnaire.items.set([id for (id, iname, name) in items])
+            deps = {}
+            for position, child in enumerate(children):
+                if isinstance(child, FakeQuestion):
+                    QuestionnaireChild.objects.create(
+                        questionnaire=questionnaire,
+                        position=position + 1,
+                        system_question=child.id,
+                        required=child.required,
+                        label=child.question,
+                    )
+                else:
+                    deps[child.id] = QuestionnaireChild.objects.create(
+                        questionnaire=questionnaire,
+                        position=position + 1,
+                        user_question=child,
+                        required=child.required,
+                        label=child.question,
+                        help_text=child.help_text,
+                        dependency_question=deps[child.dependency_question.id] if child.dependency_question else None,
+                        dependency_values=child.dependency_values,
+                    )
+
+
+def migrate_questions_backward(apps, schema_editor):
+    pass  # as long as we don't delete the old columns, this is a no op. after that, it gets complicated...
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0298_pluggable_permissions'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Questionnaire',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('internal_name', models.CharField(max_length=255)),
+                ('type', models.CharField(max_length=5)),
+                ('position', models.PositiveIntegerField(default=0)),
+                ('all_sales_channels', models.BooleanField(default=True)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='questionnaires', to='pretixbase.event')),
+                ('items', models.ManyToManyField(related_name='questionnaires', to='pretixbase.item')),
+                ('limit_sales_channels', models.ManyToManyField(to='pretixbase.saleschannel')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.CreateModel(
+            name='QuestionnaireChild',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('position', models.PositiveIntegerField(default=0)),
+                ('system_question', models.CharField(max_length=25, null=True)),
+                ('required', models.BooleanField(default=False)),
+                ('label', i18nfield.fields.I18nTextField()),
+                ('help_text', i18nfield.fields.I18nTextField(null=True)),
+                ('dependency_values', pretix.base.models.fields.MultiStringField(default=[])),
+                ('dependency_question', models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='dependent_questions', to='pretixbase.questionnairechild')),
+                ('questionnaire', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='children', to='pretixbase.questionnaire')),
+                ('user_question', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='references', to='pretixbase.question')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.RunPython(
+            migrate_questions_forward,
+            migrate_questions_backward,
+        ),
+        # TODO remove old columns from Question model
+    ]

src/pretix/base/models/items.py

@@ -1595,10 +1595,12 @@ class ItemBundle(models.Model):
 
 class Question(LoggedModel):
     """
-    A question is an input field that can be used to extend a ticket by custom information,
+    A question is a data field that can be used to extend an order or a ticket by custom
-    e.g. "Attendee age". The answers are found next to the position. The answers may be found
+    information, e.g. "Attendee age". To be actually useful, questions need to be added to
-    in QuestionAnswers, attached to OrderPositions/CartPositions. A question can allow one of
+    one or multiple Questionnaires. The answers may be found in QuestionAnswers, attached
-    several input types, currently:
+    to Orders, OrderPositions or CartPositions.
+
+    A question can allow one of several input types, currently:
 
     * a number (``TYPE_NUMBER``)
     * a one-line string (``TYPE_STRING``)
@@ -1667,7 +1669,7 @@ class Question(LoggedModel):
         related_name="questions",
         on_delete=models.CASCADE
     )
-    question = I18nTextField(
+    question = I18nTextField(  # to be renamed to 'internal_name'
         verbose_name=_("Question")
     )
     identifier = models.CharField(
@@ -1682,7 +1684,7 @@ class Question(LoggedModel):
             ),
         ],
     )
-    help_text = I18nTextField(
+    help_text = I18nTextField(  # to be removed
         verbose_name=_("Help text"),
         help_text=_("If the question needs to be explained or clarified, do it here!"),
         null=True, blank=True,
@@ -1692,22 +1694,22 @@ class Question(LoggedModel):
         choices=TYPE_CHOICES,
         verbose_name=_("Question type")
     )
-    required = models.BooleanField(
+    required = models.BooleanField(  # to be removed, -> QuestionnaireChild
         default=False,
         verbose_name=_("Required question")
     )
-    items = models.ManyToManyField(
+    items = models.ManyToManyField(  # to be removed, -> Questionnaire
         Item,
         related_name='questions',
         verbose_name=_("Products"),
         blank=True,
         help_text=_('This question will be asked to buyers of the selected products')
     )
-    position = models.PositiveIntegerField(
+    position = models.PositiveIntegerField(  # to be removed, -> Questionnaire + QuestionnaireChild
         default=0,
         verbose_name=_("Position")
     )
-    ask_during_checkin = models.BooleanField(
+    ask_during_checkin = models.BooleanField(  # to be removed
         verbose_name=_('Ask during check-in instead of in the ticket buying process'),
         help_text=_('Not supported by all check-in apps for all question types.'),
         default=False
@@ -1717,7 +1719,7 @@ class Question(LoggedModel):
         help_text=_('Not supported by all check-in apps for all question types.'),
         default=False
     )
-    hidden = models.BooleanField(
+    hidden = models.BooleanField(  # to be removed
         verbose_name=_('Hidden question'),
         help_text=_('This question will only show up in the backend.'),
         default=False
@@ -1726,10 +1728,10 @@ class Question(LoggedModel):
         verbose_name=_('Print answer on invoices'),
         default=False
     )
-    dependency_question = models.ForeignKey(
+    dependency_question = models.ForeignKey(  # to be removed, -> QuestionnaireChild
         'Question', null=True, blank=True, on_delete=models.SET_NULL, related_name='dependent_questions'
     )
-    dependency_values = MultiStringField(default=[])
+    dependency_values = MultiStringField(default=[])  # to be removed, -> QuestionnaireChild
     valid_number_min = models.DecimalField(decimal_places=6, max_digits=30, null=True, blank=True,
                                            verbose_name=_('Minimum value'),
                                            help_text=_('Currently not supported in our apps and during check-in'))
@@ -1763,9 +1765,9 @@ class Question(LoggedModel):
     objects = ScopedManager(organizer='event__organizer')
 
     class Meta:
-        verbose_name = _("Question")
+        verbose_name = _("Data field")
-        verbose_name_plural = _("Questions")
+        verbose_name_plural = _("Data fields")
-        ordering = ('position', 'id')
+        ordering = ('question', 'id')
         unique_together = (('event', 'identifier'),)
 
     def __str__(self):
@@ -1990,6 +1992,103 @@ class QuestionOption(models.Model):
         ordering = ('position', 'id')
 
 
+class Questionnaire(LoggedModel):
+    TYPE_ORDER_SALE = "OS"
+    TYPE_ORDER_POSITION_SALE = "PS"
+    TYPE_ORDER_POSITION_ATTENDEE_ONLY = "PA"
+    TYPE_ORDER_POSITION_CHECKIN = "PC"
+    TYPE_CHOICES = (
+        (TYPE_ORDER_SALE, _("Order-wide, before purchase")),
+        (TYPE_ORDER_POSITION_SALE, _("Per product, before purchase")),
+        (TYPE_ORDER_POSITION_ATTENDEE_ONLY, _("Per product, via attendee link")),
+        (TYPE_ORDER_POSITION_CHECKIN, _("Per product, at check-in")),
+    )
+    event = models.ForeignKey(
+        Event,
+        related_name="questionnaires",
+        on_delete=models.CASCADE
+    )
+    internal_name = models.CharField(
+        verbose_name=_("Internal name"),
+        max_length=255,
+    )
+    type = models.CharField(
+        max_length=5,
+        choices=TYPE_CHOICES,
+        verbose_name=_("Questionnaire type")
+    )
+    items = models.ManyToManyField(
+        Item,
+        related_name='questionnaires',
+        verbose_name=_("Products"),
+        blank=True,
+        help_text=_('This questionnaire will be asked to buyers of the selected products')
+    )
+    position = models.PositiveIntegerField(
+        default=0,
+        verbose_name=_("Position")
+    )
+    all_sales_channels = models.BooleanField(
+        verbose_name=_("Sell on all sales channels the product is sold on"),
+        default=True,
+    )
+    limit_sales_channels = models.ManyToManyField(
+        "SalesChannel",
+        verbose_name=_("Restrict to specific sales channels"),
+        help_text=_('The sales channel selection for the product as a whole takes precedence, so if a sales channel is '
+                    'selected here but not on product level, the variation will not be available.'),
+        blank=True,
+    )
+
+
+class QuestionnaireChild(LoggedModel):
+    SYSTEM_QUESTION_CHOICES = (
+        ('attendee_name_parts', _('Attendee name')),
+        ('attendee_email', _('Attendee email')),
+        ('company', _('Company')),
+        ('street', _('Street')),
+        ('zipcode', _('ZIP code')),
+        ('city', _('City')),
+        ('country', _('Country')),
+    )
+    questionnaire = models.ForeignKey(
+        Questionnaire,
+        related_name="children",
+        on_delete=models.CASCADE
+    )
+    position = models.PositiveIntegerField(
+        default=0,
+        verbose_name=_("Position")
+    )
+    user_question = models.ForeignKey(
+        Question,
+        related_name="references",
+        on_delete=models.CASCADE,
+        null=True, blank=True,
+    )
+    system_question = models.CharField(
+        max_length=25,
+        choices=SYSTEM_QUESTION_CHOICES,
+        null=True, blank=True,
+    )
+    required = models.BooleanField(
+        default=False,
+        verbose_name=_("Required question")
+    )
+    label = I18nTextField(
+        verbose_name=_("Question")
+    )
+    help_text = I18nTextField(
+        verbose_name=_("Help text"),
+        help_text=_("If the question needs to be explained or clarified, do it here!"),
+        null=True, blank=True,
+    )
+    dependency_question = models.ForeignKey(
+        'QuestionnaireChild', null=True, blank=True, on_delete=models.SET_NULL, related_name='dependent_questions'
+    )
+    dependency_values = MultiStringField(default=[])
+
+
 class Quota(LoggedModel):
     """
     A quota is a "pool of tickets". It is there to limit the number of items

src/pretix/control/logdisplay.py

@@ -850,6 +850,9 @@ class OrganizerPluginStateLogEntryType(LogEntryType):
     'pretix.event.question.option.added': _('An answer option has been added to the question.'),
     'pretix.event.question.option.deleted': _('An answer option has been removed from the question.'),
     'pretix.event.question.option.changed': _('An answer option has been changed.'),
+    'pretix.event.questionnaire.added': _('A questionnaire has been created.'),
+    'pretix.event.questionnaire.deleted': _('A questionnaire has been deleted.'),
+    'pretix.event.questionnaire.changed': _('A questionnaire has been changed.'),
     'pretix.event.permissions.added': _('A user has been added to the event team.'),
     'pretix.event.permissions.invited': _('A user has been invited to the event team.'),
     'pretix.event.permissions.changed': _('A user\'s permissions have been changed.'),