Custom order emails: Allow to attach tickets and invoices

src/pretix/base/models/invoices.py

@@ -300,6 +300,9 @@ class Invoice(models.Model):
     def __repr__(self):
         return '<Invoice {} / {}>'.format(self.full_invoice_no, self.pk)
 
+    def __str__(self):
+        return self.full_invoice_no
+
 
 class InvoiceLine(models.Model):
     """

src/pretix/control/forms/orders.py

@@ -57,7 +57,8 @@ from pretix.base.forms.widgets import (
     DatePickerWidget, SplitDateTimePickerWidget,
 )
 from pretix.base.models import (
-    InvoiceAddress, ItemAddOn, Order, OrderFee, OrderPosition, TaxRule,
+    Invoice, InvoiceAddress, ItemAddOn, Order, OrderFee, OrderPosition,
+    TaxRule,
 )
 from pretix.base.models.event import SubEvent
 from pretix.base.services.pricing import get_price
@@ -609,6 +610,17 @@ class OrderMailForm(forms.Form):
         label=_("Subject"),
         required=True
     )
+    attach_tickets = forms.BooleanField(
+        label=_("Attach tickets"),
+        help_text=_("Will be ignored if all tickets in this order exceed a given size limit to ensure email deliverability."),
+        required=False
+    )
+    attach_invoices = forms.ModelMultipleChoiceField(
+        label=_("Attach invoices"),
+        widget=forms.CheckboxSelectMultiple,
+        required=False,
+        queryset=Invoice.objects.none()
+    )
 
     def _set_field_placeholders(self, fn, base_parameters):
         phs = [
@@ -641,6 +653,7 @@ class OrderMailForm(forms.Form):
             widget=forms.Textarea,
             initial=order.event.settings.mail_text_order_custom_mail.localize(order.locale),
         )
+        self.fields['attach_invoices'].queryset = order.invoices.all()
         self._set_field_placeholders('message', ['event', 'order'])
 
 
@@ -648,6 +661,7 @@ class OrderPositionMailForm(OrderMailForm):
     def __init__(self, *args, **kwargs):
         position = self.position = kwargs.pop('position')
         super().__init__(*args, **kwargs)
+        del self.fields['attach_invoices']
         self.fields['sendto'].initial = position.attendee_email
         self.fields['message'] = forms.CharField(
             label=_("Message"),

src/pretix/control/templates/pretixcontrol/order/sendmail.html

@@ -18,6 +18,10 @@
             {% bootstrap_field form.sendto layout='horizontal' %}
             {% bootstrap_field form.subject layout='horizontal' %}
             {% bootstrap_field form.message layout='horizontal' %}
+            {% bootstrap_field form.attach_tickets layout='horizontal' %}
+            {% if form.attach_invoices %}
+                {% bootstrap_field form.attach_invoices layout='horizontal' %}
+            {% endif %}
             {% if request.method == "POST" %}
                 <fieldset>
                     <legend>{% trans "E-mail preview" %}</legend>

src/pretix/control/views/orders.py

@@ -1982,7 +1982,9 @@ class OrderSendMail(EventPermissionRequiredMixin, OrderViewMixin, FormView):
                 order.send_mail(
                     form.cleaned_data['subject'], email_template,
                     email_context, 'pretix.event.order.email.custom_sent',
-                    self.request.user, auto_email=False
+                    self.request.user, auto_email=False,
+                    attach_tickets=form.cleaned_data.get('attach_tickets', False),
+                    invoices=form.cleaned_data.get('attach_invoices', []),
                 )
                 messages.success(self.request,
                                  _('Your message has been queued and will be sent to {}.'.format(order.email)))
@@ -2047,7 +2049,8 @@ class OrderPositionSendMail(OrderSendMail):
                     email_template,
                     email_context,
                     'pretix.event.order.position.email.custom_sent',
-                    self.request.user
+                    self.request.user,
+                    attach_tickets=form.cleaned_data.get('attach_tickets', False),
                 )
                 messages.success(self.request,
                                  _('Your message has been queued and will be sent to {}.'.format(position.attendee_email)))