Allow adding question answers to ticket layouts

src/pretix/base/models/event.py

@@ -394,12 +394,15 @@ class Event(EventMixin, LoggedModel):
             for v in vars:
                 q.variations.add(variation_map[v.pk])
 
+        question_map = {}
         for q in Question.objects.filter(event=other).prefetch_related('items', 'options'):
             items = list(q.items.all())
             opts = list(q.options.all())
+            question_map[q.pk] = q
             q.pk = None
             q.event = self
             q.save()
+
             for i in items:
                 q.items.add(item_map[i.pk])
             for o in opts:
@@ -434,6 +437,7 @@ class Event(EventMixin, LoggedModel):
         event_copy_data.send(
             sender=self, other=other,
             tax_map=tax_map, category_map=category_map, item_map=item_map, variation_map=variation_map,
+            question_map=question_map
         )
 
     def get_payment_providers(self) -> dict:

src/pretix/base/signals.py

@@ -253,8 +253,8 @@ but you might need to modify that data.
 
 The ``sender`` keyword argument will contain the event of the **new** event. The ``other``
 keyword argument will contain the event to **copy from**. The keyword arguments
-``tax_map``, ``category_map``, ``item_map``, and ``variation_map`` contain mappings
-from object IDs in the original event to objects in the new event of the respective
+``tax_map``, ``category_map``, ``item_map``, ``question_map``, and ``variation_map`` contain
+mappings from object IDs in the original event to objects in the new event of the respective
 types.
 """
 

src/pretix/plugins/ticketoutputpdf/signals.py

@@ -1,9 +1,14 @@
+from functools import partial
+
 from django.dispatch import receiver
 from django.template.loader import get_template
 from django.urls import resolve
+from django.utils.translation import ugettext_lazy as _
 
+from pretix.base.models import QuestionAnswer
 from pretix.base.signals import (
-    EventPluginSignal, register_data_exporters, register_ticket_outputs,
+    EventPluginSignal, event_copy_data, register_data_exporters,
+    register_ticket_outputs,
 )
 from pretix.control.signals import html_head
 from pretix.presale.style import (  # NOQA: legacy import
@@ -52,3 +57,36 @@ dictionaries as values that contain keys like in the following example::
 The evaluate member will be called with the order position, order and event as arguments. The event might
 also be a subevent, if applicable.
 """
+
+
+def get_answer(op, order, event, question_id):
+    try:
+        a = op.answers.get(question_id=question_id)
+        return str(a).replace("\n", "<br/>\n")
+    except QuestionAnswer.DoesNotExist:
+        return ""
+
+
+@receiver(layout_text_variables, dispatch_uid="pretix_ticketoutputpdf_layout_text_variables_questions")
+def variables_from_questions(sender, *args, **kwargs):
+    d = {}
+    for q in sender.questions.all():
+        d['question_{}'.format(q.pk)] = {
+            'label': _('Question: {question}').format(question=q.question),
+            'editor_sample': _('<Answer: {question}>').format(question=q.question),
+            'evaluate': partial(get_answer, question_id=q.pk)
+        }
+    return d
+
+
+@receiver(signal=event_copy_data, dispatch_uid="pretix_ticketoutputpdf_copy_data")
+def event_copy_data_receiver(sender, other, question_map, **kwargs):
+    layout = sender.settings.get('ticketoutput_pdf_layout', as_type=list)
+    if not layout:
+        return
+    for o in layout:
+        if o['type'] == 'textarea':
+            if o['content'].startswith('question_'):
+                o['content'] = 'question_{}'.format(question_map.get(int(o['content'][9:]), 0).pk)
+
+    sender.settings.set('ticketoutput_pdf_layout', list(layout))