Order change manager: Allow to add multiple products

src/pretix/control/forms/orders.py

@@ -196,10 +196,6 @@ class OtherOperationsForm(forms.Form):
 
 
 class OrderPositionAddForm(forms.Form):
-    do = forms.BooleanField(
-        label=_('Add a new product to the order'),
-        required=False
-    )
     itemvar = forms.ChoiceField(
         label=_('Product')
     )
@@ -291,6 +287,28 @@ class OrderPositionAddForm(forms.Form):
         change_decimal_field(self.fields['price'], order.event.currency)
 
 
+class OrderPositionAddFormset(forms.BaseFormSet):
+    def __init__(self, *args, **kwargs):
+        self.order = kwargs.pop('order', None)
+        super().__init__(*args, **kwargs)
+
+    def _construct_form(self, i, **kwargs):
+        kwargs['order'] = self.order
+        return super()._construct_form(i, **kwargs)
+
+    @property
+    def empty_form(self):
+        form = self.form(
+            auto_id=self.auto_id,
+            prefix=self.add_prefix('__prefix__'),
+            empty_permitted=True,
+            use_required_attribute=False,
+            order=self.order,
+        )
+        self.add_fields(form, None)
+        return form
+
+
 class OrderPositionChangeForm(forms.Form):
     itemvar = forms.ChoiceField(
         required=False,

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

@@ -1,6 +1,7 @@
 {% extends "pretixcontrol/event/base.html" %}
 {% load i18n %}
 {% load bootstrap3 %}
+{% load formset_tags %}
 {% load money %}
 {% block title %}
     {% blocktrans trimmed with code=order.code %}
@@ -64,10 +65,10 @@
                         {% endif %}
                         {% if position.addon_to %}
                             – <em>
-                                {% blocktrans trimmed with posid=position.addon_to.positionid %}
-                                    Add-On to position #{{ posid }}
-                                {% endblocktrans %}
-                            </em>
+                            {% blocktrans trimmed with posid=position.addon_to.positionid %}
+                                Add-On to position #{{ posid }}
+                            {% endblocktrans %}
+                        </em>
                         {% endif %}
                     </h3>
                 </div>
@@ -173,33 +174,87 @@
                 </div>
             </div>
         {% endfor %}
-        <div class="panel panel-default items">
-            <div class="panel-heading">
-                <h3 class="panel-title">
-                    {% trans "Add product" %}
-                </h3>
-            </div>
-            <div class="panel-body">
-                <div class="form-horizontal">
-                    {% bootstrap_form_errors add_form %}
-                    {% if add_form.custom_error %}
-                        <div class="alert alert-danger">
-                            {{ add_form.custom_error }}
+
+
+        <div class="formset" data-formset data-formset-prefix="{{ add_formset.prefix }}">
+            {{ add_formset.management_form }}
+            {% bootstrap_formset_errors add_formset %}
+            <div data-formset-body>
+                {% for add_form in add_formset %}
+                    <div class="panel panel-default items" data-formset-form>
+                        <div class="panel-heading">
+                            <h3 class="panel-title">
+                                <button type="button" class="btn btn-danger btn-xs pull-right flip"
+                                        data-formset-delete-button>
+                                    <i class="fa fa-trash"></i>
+                                </button>
+                                {% trans "Add product" %}
+                                <div class="sr-only">
+                                    {{ add_form.id }}
+                                    {% bootstrap_field add_form.DELETE form_group_class="" layout="inline" %}
+                                </div>
+                            </h3>
                         </div>
-                    {% endif %}
-                    {% bootstrap_field add_form.do layout="control" %}
-                    {% bootstrap_field add_form.itemvar layout="control" %}
-                    {% bootstrap_field add_form.price addon_after=request.event.currency layout="control" %}
-                    {% if add_form.addon_to %}
-                        {% bootstrap_field add_form.addon_to layout="control" %}
-                    {% endif %}
-                    {% if add_form.subevent %}
-                        {% bootstrap_field add_form.subevent layout="control" %}
-                    {% endif %}
-                    {% bootstrap_field add_form.seat layout="control" %}
-                </div>
+                        <div class="panel-body">
+                            <div class="form-horizontal">
+                                {% bootstrap_form_errors add_form %}
+                                {% if add_form.custom_error %}
+                                    <div class="alert alert-danger">
+                                        {{ add_form.custom_error }}
+                                    </div>
+                                {% endif %}
+                                {% bootstrap_field add_form.itemvar layout="control" %}
+                                {% bootstrap_field add_form.price addon_after=request.event.currency layout="control" %}
+                                {% if add_form.addon_to %}
+                                    {% bootstrap_field add_form.addon_to layout="control" %}
+                                {% endif %}
+                                {% if add_form.subevent %}
+                                    {% bootstrap_field add_form.subevent layout="control" %}
+                                {% endif %}
+                                {% bootstrap_field add_form.seat layout="control" %}
+                            </div>
+                        </div>
+                    </div>
+                {% endfor %}
             </div>
+            <script type="form-template" data-formset-empty-form>
+                {% escapescript %}
+                    <div class="panel panel-default items" data-formset-form>
+                        <div class="panel-heading">
+                            <h3 class="panel-title">
+                                <button type="button" class="btn btn-danger btn-xs pull-right flip"
+                                        data-formset-delete-button>
+                                    <i class="fa fa-trash"></i>
+                                </button>
+                                {% trans "Add product" %}
+                                <div class="sr-only">
+                                    {{ add_formset.empty_form.id }}
+                                    {% bootstrap_field add_formset.empty_form.DELETE form_group_class="" layout="inline" %}
+                                </div>
+                            </h3>
+                        </div>
+                        <div class="panel-body">
+                            <div class="form-horizontal">
+                                {% bootstrap_field add_formset.empty_form.itemvar layout="control" %}
+                                {% bootstrap_field add_formset.empty_form.price addon_after=request.event.currency layout="control" %}
+                                {% if add_formset.empty_form.addon_to %}
+                                    {% bootstrap_field add_formset.empty_form.addon_to layout="control" %}
+                                {% endif %}
+                                {% if add_formset.empty_form.subevent %}
+                                    {% bootstrap_field add_formset.empty_form.subevent layout="control" %}
+                                {% endif %}
+                                {% bootstrap_field add_formset.empty_form.seat layout="control" %}
+                            </div>
+                        </div>
+                    </div>
+                {% endescapescript %}
+            </script>
+            <p>
+                <button type="button" class="btn btn-default" data-formset-add>
+                    <i class="fa fa-plus"></i> {% trans "Add product" %}</button>
+            </p>
         </div>
+
         <div class="panel panel-default items">
             <div class="panel-heading">
                 <h3 class="panel-title">

src/pretix/control/views/orders.py

@@ -14,6 +14,7 @@ from django.db import transaction
 from django.db.models import (
     Count, IntegerField, OuterRef, Prefetch, ProtectedError, Q, Subquery, Sum,
 )
+from django.forms import formset_factory
 from django.http import (
     FileResponse, Http404, HttpResponseNotAllowed, JsonResponse,
 )
@@ -70,8 +71,8 @@ from pretix.control.forms.filter import (
 from pretix.control.forms.orders import (
     CancelForm, CommentForm, ConfirmPaymentForm, ExporterForm, ExtendForm,
     MarkPaidForm, OrderContactForm, OrderLocaleForm, OrderMailForm,
-    OrderPositionAddForm, OrderPositionChangeForm, OrderRefundForm,
-    OtherOperationsForm,
+    OrderPositionAddForm, OrderPositionAddFormset, OrderPositionChangeForm,
+    OrderRefundForm, OtherOperationsForm,
 )
 from pretix.control.permissions import EventPermissionRequiredMixin
 from pretix.control.views import PaginationMixin
@@ -1188,9 +1189,16 @@ class OrderChange(OrderView):
                                    data=self.request.POST if self.request.method == "POST" else None)
 
     @cached_property
-    def add_form(self):
-        return OrderPositionAddForm(prefix='add', order=self.order,
-                                    data=self.request.POST if self.request.method == "POST" else None)
+    def add_formset(self):
+        ff = formset_factory(
+            OrderPositionAddForm, formset=OrderPositionAddFormset,
+            can_order=False, can_delete=True, extra=0
+        )
+        return ff(
+            prefix='add',
+            order=self.order,
+            data=self.request.POST if self.request.method == "POST" else None
+        )
 
     @cached_property
     def positions(self):
@@ -1208,7 +1216,7 @@ class OrderChange(OrderView):
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
         ctx['positions'] = self.positions
-        ctx['add_form'] = self.add_form
+        ctx['add_formset'] = self.add_formset
         ctx['other_form'] = self.other_form
         return ctx
 
@@ -1221,16 +1229,17 @@ class OrderChange(OrderView):
             return True
 
     def _process_add(self, ocm):
-        if 'add-do' not in self.request.POST:
-            return True
-        if not self.add_form.is_valid():
+        if not self.add_formset.is_valid():
             return False
         else:
-            if self.add_form.cleaned_data['do']:
-                if '-' in self.add_form.cleaned_data['itemvar']:
-                    itemid, varid = self.add_form.cleaned_data['itemvar'].split('-')
+            for f in self.add_formset.forms:
+                if f in self.add_formset.deleted_forms or not f.has_changed():
+                    continue
+
+                if '-' in f.cleaned_data['itemvar']:
+                    itemid, varid = f.cleaned_data['itemvar'].split('-')
                 else:
-                    itemid, varid = self.add_form.cleaned_data['itemvar'], None
+                    itemid, varid = f.cleaned_data['itemvar'], None
 
                 item = Item.objects.get(pk=itemid, event=self.request.event)
                 if varid:
@@ -1239,12 +1248,12 @@ class OrderChange(OrderView):
                     variation = None
                 try:
                     ocm.add_position(item, variation,
-                                     self.add_form.cleaned_data['price'],
-                                     self.add_form.cleaned_data.get('addon_to'),
-                                     self.add_form.cleaned_data.get('subevent'),
-                                     self.add_form.cleaned_data.get('seat'))
+                                     f.cleaned_data['price'],
+                                     f.cleaned_data.get('addon_to'),
+                                     f.cleaned_data.get('subevent'),
+                                     f.cleaned_data.get('seat'))
                 except OrderError as e:
-                    self.add_form.custom_error = str(e)
+                    f.custom_error = str(e)
                     return False
         return True