more work on backoffice economy stuff, chains and credebtors section now only shows expenses and revenues for the current camp, thanks to some ORM foo; while here add a cost and a comment field to the Product table, and fix a bug in bootstrap_devsite and a few nags to make new flake8 happy

src/backoffice/templates/chain_detail_backoffice.html

@@ -6,9 +6,15 @@ Details for Chain {{ chain.name }} | {{ block.super }}
 {% endblock %}
 
 {% block content %}
-<h2>Details for Chain {{ chain.name }}</h2>
+<div class="panel panel-default">
+  <div class="panel-heading"><h3 class="panel-title">Details for Chain {{ chain.name }} - BackOffice</h3></div>
+  <div class="panel-body">
+    <p class="lead">This chain has <b>{{ chain.camp_expenses_count }} expenses</b> for a total of <b>{{ chain.camp_expenses_amount }} DKK</b> and <b>{{ chain.camp_revenues_count }} revenues</b> for a total of <b>{{ chain.camp_revenues_amount }} DKK</b> for {{ camp.title }}.</p>
+    <p class="lead">This chain has <b>{{ chain.all_expenses_count }} expenses</b> for a total of <b>{{ chain.all_expenses_amount }} DKK</b> and <b>{{ chain.all_revenues_count }} revenues</b> for a total of <b>{{ chain.all_revenues_amount }} DKK</b> across all camps.</p>
     <a class="btn btn-default" href="{% url "backoffice:chain_list" camp_slug=camp.slug %}"><i class="fas fa-undo"></i> Back to Chain list</a>
 
+    <hr>
+
     <h3>{{ chain.credebtors.count }} Credebtors for Chain {{ chain.name }}</h3>
     <table class="table table-hover">
       <thead>
@@ -24,26 +30,32 @@ Details for Chain {{ chain.name }} | {{ block.super }}
         </tr>
       </thead>
       <tbody>
-  {% for credebtor in chain.credebtors.all %}
+      {% for credebtor in credebtors %}
         <tr>
           <td><a class="btn btn-primary" href="{% url 'backoffice:credebtor_detail' camp_slug=camp.slug chain_slug=chain.slug credebtor_slug=credebtor.slug %}">{{ credebtor.name }}</a></td>
           <td><address>{{ credebtor.address }}</address></td>
           <td>{{ credebtor.notes|default:"N/A" }}</td>
-      <td class="text-center"><span class="badge">{{ credebtor.expenses.count }}</span></td>
+          <td class="text-center"><span class="badge">{{ credebtor.camp_expenses_count }}</span></td>
-      <td class="text-center">{{ credebtor.expenses_total }} DKK</td>
+          <td class="text-center">{{ credebtor.camp_expenses_amount }} DKK</td>
-      <td class="text-center"><span class="badge">{{ credebtor.revenues.count }}</span></td>
+          <td class="text-center"><span class="badge">{{ credebtor.camp_revenues_count }}</span></td>
-      <td class="text-center">{{ credebtor.revenues_total }} DKK</td>
+          <td class="text-center">{{ credebtor.camp_revenues_amount }} DKK</td>
           <td>
             <a class="btn btn-primary" href="{% url 'backoffice:credebtor_detail' camp_slug=camp.slug chain_slug=chain.slug credebtor_slug=credebtor.slug %}"><i class="fas fa-search"></i> Details</a>
       {% endfor %}
       </tbody>
     </table>
 
-<h3>{{ chain.expenses_count }} Expenses for Chain {{ chain.name }}</h3>
+    <hr>
-{% include 'includes/expense_list_panel.html' with expense_list=chain.expenses.all %}
 
-<h3>{{ chain.revenues_count }} Revenues for Chain {{ chain.name }}</h3>
+    <h3>{{ expenses.count }} Expenses for Chain {{ chain.name }}</h3>
-{% include 'includes/revenue_list_panel.html' with revenue_list=chain.revenues.all %}
+    {% include 'includes/expense_list_panel.html' with expense_list=expenses %}
+
+    <hr>
+
+    <h3>{{ revenues.count }} Revenues for Chain {{ chain.name }}</h3>
+    {% include 'includes/revenue_list_panel.html' with revenue_list=revenues %}
+
+  </div>
+</div>
 
 {% endblock content %}
-

src/backoffice/templates/chain_list_backoffice.html

@@ -7,7 +7,10 @@ Select Chain | {{ block.super }}
 {% endblock %}
 
 {% block content %}
-<h2>Chains</h2>
+<div class="panel panel-default">
+  <div class="panel-heading"><h3 class="panel-title">Chains - BackOffice</h3></div>
+  <div class="panel-body">
+      <p class="lead">Showing {{ chain_list.count }} chains. Not all chains have expenses or revenues for {{ camp.title }}.</p>
     <p><a class="btn btn-default" href="{% url "backoffice:index" camp_slug=camp.slug %}"><i class="fas fa-undo"></i> Back to Backoffice Index</a></p>
 
     {% if chain_list %}
@@ -30,10 +33,10 @@ Select Chain | {{ block.super }}
           <td>{{ chain.name }}</td>
           <td>{{ chain.notes|default:"N/A" }}</td>
           <td class="text-center"><span class="badge">{{ chain.credebtors.count }}</span></td>
-      <td class="text-center"><span class="badge">{{ chain.expenses_count }}</span></td>
+          <td class="text-center"><span class="badge">{{ chain.camp_expenses_count }}</span></td>
-      <td class="text-center">{{ chain.expenses_total|default:"0" }} DKK</td>
+          <td class="text-center">{{ chain.camp_expenses_amount|default:"0" }} DKK</td>
-      <td class="text-center"><span class="badge">{{ chain.revenues_count }}</span></td>
+          <td class="text-center"><span class="badge">{{ chain.camp_revenues_count }}</span></td>
-      <td class="text-center">{{ chain.revenues_total|default:"0" }} DKK</td>
+          <td class="text-center">{{ chain.camp_revenues_amount|default:"0" }} DKK</td>
           <td>
             <a class="btn btn-primary" href="{% url 'backoffice:chain_detail' camp_slug=camp.slug chain_slug=chain.slug %}"><i class="fas fa-search"></i> Details</a>
           </td>
@@ -44,5 +47,6 @@ Select Chain | {{ block.super }}
     {% else %}
     <p class="lead"><i>No Chains found.</i></p>
     {% endif %}
-
+  </div>
+</div>
 {% endblock %}

src/backoffice/templates/credebtor_detail_backoffice.html

@@ -6,14 +6,17 @@ Details for Credebtor {{ credebtor.name }} (Chain {{ credebtor.chain.name }}) |
 {% endblock %}
 
 {% block content %}
-<h2>Details for Credebtor {{ credebtor.name }} (Chain {{ credebtor.chain.name }})</h2>
+<div class="panel panel-default">
-<a class="btn btn-default" href="{% url "backoffice:chain_detail" camp_slug=camp.slug chain_slug=credebtor.chain.slug %}"><i class="fas fa-undo"></i> Back to Credebtor list</a>
+  <div class="panel-heading"><h3 class="panel-title">Details for Credebtor {{ credebtor.name }} (Chain {{ credebtor.chain.name }}) - BackOffice</h3></div>
+  <div class="panel-body">
+    <a class="btn btn-default" href="{% url "backoffice:chain_detail" camp_slug=camp.slug chain_slug=credebtor.chain.slug %}"><i class="fas fa-undo"></i> Back to Credebtor list for {{ credebtor.chain.name }}</a>
 
-<h3>{{ credebtor.expenses.count }} Expenses for Credebtor {{ credebtor.name }}</h3>
+    <h3>{{ expenses.count }} Expenses for Credebtor {{ credebtor.name }}</h3>
-{% include 'includes/expense_list_panel.html' with expense_list=credebtor.expenses.all %}
+    {% include 'includes/expense_list_panel.html' with expense_list=expenses %}
-
-<h3>{{ credebtor.revenues.count }} Revenues for Credebtor {{ credebtor.name }}</h3>
-{% include 'includes/revenue_list_panel.html' with revenue_list=credebtor.revenues.all %}
 
+    <h3>{{ revenues.count }} Revenues for Credebtor {{ credebtor.name }}</h3>
+    {% include 'includes/revenue_list_panel.html' with revenue_list=revenues %}
+  </div>
+</div>
 {% endblock content %}
 

src/backoffice/views.py

@@ -298,7 +298,11 @@ class FacilityCreateView(CampViewMixin, OrgaTeamPermissionMixin, CreateView):
 
     def get_form(self, *args, **kwargs):
         form = super().get_form(*args, **kwargs)
-        form.fields["location"].widget = LeafletWidget(attrs={"display_raw": "true",})
+        form.fields["location"].widget = LeafletWidget(
+            attrs={
+                "display_raw": "true",
+            }
+        )
         return form
 
     def get_context_data(self, **kwargs):
@@ -324,7 +328,11 @@ class FacilityUpdateView(CampViewMixin, OrgaTeamPermissionMixin, UpdateView):
 
     def get_form(self, *args, **kwargs):
         form = super().get_form(*args, **kwargs)
-        form.fields["location"].widget = LeafletWidget(attrs={"display_raw": "true",})
+        form.fields["location"].widget = LeafletWidget(
+            attrs={
+                "display_raw": "true",
+            }
+        )
         return form
 
     def get_success_url(self):
@@ -445,7 +453,7 @@ class FacilityOpeningHoursCreateView(
         hours = form.save(commit=False)
         hours.facility = self.facility
         hours.save()
-        messages.success(self.request, f"New opening hours created successfully!")
+        messages.success(self.request, "New opening hours created successfully!")
         return redirect(
             reverse(
                 "backoffice:facility_detail",
@@ -547,7 +555,9 @@ class SpeakerProposalListView(CampViewMixin, ContentTeamPermissionMixin, ListVie
 
 
 class SpeakerProposalDetailView(
-    AvailabilityMatrixViewMixin, ContentTeamPermissionMixin, DetailView,
+    AvailabilityMatrixViewMixin,
+    ContentTeamPermissionMixin,
+    DetailView,
 ):
     """ This view permits Content Team members to see SpeakerProposal details """
 
@@ -915,7 +925,8 @@ class EventDeleteView(CampViewMixin, ContentTeamPermissionMixin, DeleteView):
 
     def get_success_url(self):
         messages.success(
-            self.request, f"Event '{self.get_object().title}' has been deleted!",
+            self.request,
+            f"Event '{self.get_object().title}' has been deleted!",
         )
         return reverse("backoffice:event_list", kwargs={"camp_slug": self.camp.slug})
 
@@ -1481,18 +1492,118 @@ class ChainListView(CampViewMixin, EconomyTeamPermissionMixin, ListView):
     model = Chain
     template_name = "chain_list_backoffice.html"
 
+    def get_queryset(self, *args, **kwargs):
+        """Annotate the total count and amount for expenses and revenues for all credebtors in each chain."""
+        qs = Chain.objects.annotate(
+            camp_expenses_amount=Sum(
+                "credebtors__expenses__amount",
+                filter=Q(credebtors__expenses__camp=self.camp),
+                distinct=True,
+            ),
+            camp_expenses_count=Count(
+                "credebtors__expenses",
+                filter=Q(credebtors__expenses__camp=self.camp),
+                distinct=True,
+            ),
+            camp_revenues_amount=Sum(
+                "credebtors__revenues__amount",
+                filter=Q(credebtors__revenues__camp=self.camp),
+                distinct=True,
+            ),
+            camp_revenues_count=Count(
+                "credebtors__revenues",
+                filter=Q(credebtors__revenues__camp=self.camp),
+                distinct=True,
+            ),
+        )
+        return qs
+
 
 class ChainDetailView(CampViewMixin, EconomyTeamPermissionMixin, DetailView):
     model = Chain
     template_name = "chain_detail_backoffice.html"
     slug_url_kwarg = "chain_slug"
 
+    def get_queryset(self, *args, **kwargs):
+        """Annotate the Chain object with the camp filtered expense and revenue info."""
+        qs = super().get_queryset(*args, **kwargs)
+        qs = qs.annotate(
+            camp_expenses_amount=Sum(
+                "credebtors__expenses__amount",
+                filter=Q(credebtors__expenses__camp=self.camp),
+                distinct=True,
+            ),
+            camp_expenses_count=Count(
+                "credebtors__expenses",
+                filter=Q(credebtors__expenses__camp=self.camp),
+                distinct=True,
+            ),
+            camp_revenues_amount=Sum(
+                "credebtors__revenues__amount",
+                filter=Q(credebtors__revenues__camp=self.camp),
+                distinct=True,
+            ),
+            camp_revenues_count=Count(
+                "credebtors__revenues",
+                filter=Q(credebtors__revenues__camp=self.camp),
+                distinct=True,
+            ),
+        )
+        return qs
+
+    def get_context_data(self, *args, **kwargs):
+        """Add credebtors, expenses and revenues to the context in camp-filtered versions."""
+        context = super().get_context_data(*args, **kwargs)
+
+        # include credebtors as a seperate queryset with annotations for total number and
+        # amount of expenses and revenues
+        context["credebtors"] = Credebtor.objects.filter(
+            chain=self.get_object()
+        ).annotate(
+            camp_expenses_amount=Sum(
+                "expenses__amount", filter=Q(expenses__camp=self.camp), distinct=True
+            ),
+            camp_expenses_count=Count(
+                "expenses", filter=Q(expenses__camp=self.camp), distinct=True
+            ),
+            camp_revenues_amount=Sum(
+                "revenues__amount", filter=Q(revenues__camp=self.camp), distinct=True
+            ),
+            camp_revenues_count=Count(
+                "revenues", filter=Q(revenues__camp=self.camp), distinct=True
+            ),
+        )
+
+        # Include expenses and revenues for the Chain in context as seperate querysets,
+        # since accessing them through the relatedmanager returns for all camps
+        context["expenses"] = Expense.objects.filter(
+            camp=self.camp, creditor__chain=self.get_object()
+        ).prefetch_related("responsible_team", "user", "creditor")
+        context["revenues"] = Revenue.objects.filter(
+            camp=self.camp, debtor__chain=self.get_object()
+        ).prefetch_related("responsible_team", "user", "debtor")
+        return context
+
 
 class CredebtorDetailView(CampViewMixin, EconomyTeamPermissionMixin, DetailView):
     model = Credebtor
     template_name = "credebtor_detail_backoffice.html"
     slug_url_kwarg = "credebtor_slug"
 
+    def get_context_data(self, *args, **kwargs):
+        context = super().get_context_data(*args, **kwargs)
+        context["expenses"] = (
+            self.get_object()
+            .expenses.filter(camp=self.camp)
+            .prefetch_related("responsible_team", "user", "creditor")
+        )
+        context["revenues"] = (
+            self.get_object()
+            .revenues.filter(camp=self.camp)
+            .prefetch_related("responsible_team", "user", "debtor")
+        )
+        return context
+
 
 ################################
 # EXPENSES
@@ -1507,7 +1618,11 @@ class ExpenseListView(CampViewMixin, EconomyTeamPermissionMixin, ListView):
         Exclude unapproved expenses, they are shown seperately
         """
         queryset = super().get_queryset(**kwargs)
-        return queryset.exclude(approved__isnull=True)
+        return queryset.exclude(approved__isnull=True).prefetch_related(
+            "creditor",
+            "user",
+            "responsible_team",
+        )
 
     def get_context_data(self, **kwargs):
         """
@@ -1516,6 +1631,10 @@ class ExpenseListView(CampViewMixin, EconomyTeamPermissionMixin, ListView):
         context = super().get_context_data(**kwargs)
         context["unapproved_expenses"] = Expense.objects.filter(
             camp=self.camp, approved__isnull=True
+        ).prefetch_related(
+            "creditor",
+            "user",
+            "responsible_team",
         )
         return context
 
@@ -1747,7 +1866,11 @@ class RevenueListView(CampViewMixin, EconomyTeamPermissionMixin, ListView):
         Exclude unapproved revenues, they are shown seperately
         """
         queryset = super().get_queryset(**kwargs)
-        return queryset.exclude(approved__isnull=True)
+        return queryset.exclude(approved__isnull=True).prefetch_related(
+            "debtor",
+            "user",
+            "responsible_team",
+        )
 
     def get_context_data(self, **kwargs):
         """
@@ -2040,7 +2163,8 @@ class PosReportCreateView(PosViewMixin, CreateView):
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context["form"].fields["bank_responsible"].queryset = Team.objects.get(
-            camp=self.camp, name="Orga",
+            camp=self.camp,
+            name="Orga",
         ).approved_members.all()
         context["form"].fields[
             "pos_responsible"
@@ -2054,7 +2178,7 @@ class PosReportCreateView(PosViewMixin, CreateView):
         pr = form.save(commit=False)
         pr.pos = self.pos
         pr.save()
-        messages.success(self.request, f"New PosReport created successfully!")
+        messages.success(self.request, "New PosReport created successfully!")
         return redirect(
             reverse(
                 "backoffice:posreport_detail",
@@ -2086,7 +2210,8 @@ class PosReportUpdateView(PosViewMixin, UpdateView):
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context["form"].fields["bank_responsible"].queryset = Team.objects.get(
-            camp=self.camp, name="Orga",
+            camp=self.camp,
+            name="Orga",
         ).approved_members.all()
         context["form"].fields[
             "pos_responsible"

src/economy/models.py

@@ -26,11 +26,26 @@ class ChainManager(models.Manager):
 
     def get_queryset(self):
         qs = super().get_queryset()
-        qs = qs.prefetch_related("credebtors__expenses", "credebtors__revenues")
+        qs = qs.prefetch_related(
-        qs = qs.annotate(expenses_total=models.Sum("credebtors__expenses__amount"))
+            models.Prefetch("credebtors__expenses", to_attr="all_expenses"),
-        qs = qs.annotate(expenses_count=models.Count("credebtors__expenses", distinct=True))
+            models.Prefetch("credebtors__revenues", to_attr="all_revenues"),
-        qs = qs.annotate(revenues_total=models.Sum("credebtors__revenues__amount"))
+        )
-        qs = qs.annotate(revenues_count=models.Count("credebtors__revenues", distinct=True))
+        qs = qs.annotate(
+            all_expenses_amount=models.Sum(
+                "credebtors__expenses__amount", distinct=True
+            )
+        )
+        qs = qs.annotate(
+            all_expenses_count=models.Count("credebtors__expenses", distinct=True)
+        )
+        qs = qs.annotate(
+            all_revenues_amount=models.Sum(
+                "credebtors__revenues__amount", distinct=True
+            )
+        )
+        qs = qs.annotate(
+            all_revenues_count=models.Count("credebtors__revenues", distinct=True)
+        )
         return qs
 
 
@@ -92,9 +107,12 @@ class CredebtorManager(models.Manager):
 
     def get_queryset(self):
         qs = super().get_queryset()
-        qs = qs.prefetch_related("expenses", "revenues")
+        qs = qs.prefetch_related(
-        qs = qs.annotate(expenses_total=models.Sum("expenses__amount"))
+            models.Prefetch("expenses", to_attr="all_expenses"),
-        qs = qs.annotate(revenues_total=models.Sum("revenues__amount"))
+            models.Prefetch("revenues", to_attr="all_revenues"),
+        )
+        qs = qs.annotate(all_expenses_amount=models.Sum("expenses__amount"))
+        qs = qs.annotate(all_revenues_amount=models.Sum("revenues__amount"))
         return qs
 
 
@@ -494,7 +512,9 @@ class Pos(CampRelatedModel, UUIDModel):
     )
 
     team = models.ForeignKey(
-        "teams.Team", on_delete=models.PROTECT, help_text="The Team managning this POS",
+        "teams.Team",
+        on_delete=models.PROTECT,
+        help_text="The Team managning this POS",
     )
 
     def save(self, **kwargs):
@@ -559,7 +579,8 @@ class PosReport(CampRelatedModel, UUIDModel):
     )
 
     comments = models.TextField(
-        blank=True, help_text="Any comments about this PosReport",
+        blank=True,
+        help_text="Any comments about this PosReport",
     )
 
     dkk_sales_izettle = models.PositiveIntegerField(
@@ -567,7 +588,8 @@ class PosReport(CampRelatedModel, UUIDModel):
     )
 
     hax_sold_izettle = models.PositiveIntegerField(
-        default=0, help_text="The number of HAX sold through the iZettle from the POS",
+        default=0,
+        help_text="The number of HAX sold through the iZettle from the POS",
     )
 
     hax_sold_website = models.PositiveIntegerField(

src/shop/migrations/0064_add_product_comment_and_cost.py

@@ -0,0 +1,28 @@
+# Generated by Django 3.1 on 2020-10-17 00:30
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("shop", "0063_auto_20200812_1732"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="product",
+            name="comment",
+            field=models.TextField(
+                blank=True, help_text="Internal comments for this product."
+            ),
+        ),
+        migrations.AddField(
+            model_name="product",
+            name="cost",
+            field=models.IntegerField(
+                default=0,
+                help_text="The cost for this product, including VAT. Used for profit calculations in the economy system.",
+            ),
+        ),
+    ]

src/shop/models.py

@@ -432,6 +432,15 @@ class Product(CreatedUpdatedModel, UUIDModel):
         blank=True,
     )
 
+    cost = models.IntegerField(
+        default=0,
+        help_text="The cost for this product, including VAT. Used for profit calculations in the economy system.",
+    )
+
+    comment = models.TextField(
+        blank=True, help_text="Internal comments for this product."
+    )
+
     objects = ProductQuerySet.as_manager()
 
     def __str__(self):

src/utils/management/commands/bootstrap_devsite.py

@@ -11,11 +11,12 @@ from camps.models import Camp
 from django.contrib.auth.models import User
 from django.contrib.gis.geos import Point
 from django.core.exceptions import ValidationError
-from django.core.management.base import BaseCommand
 from django.core.management import call_command
+from django.core.management.base import BaseCommand
 from django.db.models.signals import post_save
 from django.utils import timezone
 from django.utils.crypto import get_random_string
+from economy.models import Chain, Credebtor, Expense, Revenue
 from events.models import Routing, Type
 from facilities.models import (
     Facility,
@@ -53,7 +54,6 @@ from tickets.models import TicketType
 from tokens.models import Token, TokenFind
 from utils.slugs import unique_slugify
 from villages.models import Village
-from economy.models import Chain, Credebtor, Expense, Revenue
 
 fake = Faker()
 tz = pytz.timezone("Europe/Copenhagen")
@@ -65,7 +65,11 @@ class ChainFactory(factory.django.DjangoModelFactory):
         model = Chain
 
     name = factory.Faker("company")
-    slug = factory.LazyAttribute(lambda f: unique_slugify(f.name, Chain.objects.all().values_list("slug", flat=True)))
+    slug = factory.LazyAttribute(
+        lambda f: unique_slugify(
+            f.name, Chain.objects.all().values_list("slug", flat=True)
+        )
+    )
 
 
 class CredebtorFactory(factory.django.DjangoModelFactory):
@@ -74,7 +78,11 @@ class CredebtorFactory(factory.django.DjangoModelFactory):
 
     chain = factory.SubFactory(ChainFactory)
     name = factory.Faker("company")
-    slug = factory.LazyAttribute(lambda f: unique_slugify(f.name, Credebtor.objects.all().values_list("slug", flat=True)))
+    slug = factory.LazyAttribute(
+        lambda f: unique_slugify(
+            f.name, Credebtor.objects.all().values_list("slug", flat=True)
+        )
+    )
     address = factory.Faker("address", locale="dk_DK")
     notes = factory.Faker("text")
 
@@ -89,7 +97,9 @@ class ExpenseFactory(factory.django.DjangoModelFactory):
     amount = factory.Faker("random_int", min=20, max=20000)
     description = factory.Faker("text")
     paid_by_bornhack = factory.Faker("random_element", elements=[True, True, False])
-    invoice = factory.django.ImageField(color=random.choice(['#ff0000', '#00ff00', '#0000ff']))
+    invoice = factory.django.ImageField(
+        color=random.choice(["#ff0000", "#00ff00", "#0000ff"])
+    )
     invoice_date = factory.Faker("date")
     responsible_team = factory.Faker("random_element", elements=Team.objects.all())
     approved = factory.Faker("random_element", elements=[True, True, False])
@@ -105,7 +115,9 @@ class RevenueFactory(factory.django.DjangoModelFactory):
     user = factory.Faker("random_element", elements=User.objects.all())
     amount = factory.Faker("random_int", min=20, max=20000)
     description = factory.Faker("text")
-    invoice = factory.django.ImageField(color=random.choice(['#ff0000', '#00ff00', '#0000ff']))
+    invoice = factory.django.ImageField(
+        color=random.choice(["#ff0000", "#00ff00", "#0000ff"])
+    )
     invoice_date = factory.Faker("date")
     responsible_team = factory.Faker("random_element", elements=Team.objects.all())
     approved = factory.Faker("random_element", elements=[True, True, False])
@@ -567,7 +579,7 @@ class Command(BaseCommand):
         try:
             CredebtorFactory.create_batch(50)
         except ValidationError:
-            self.outout("Name conflict, retrying...")
+            self.output("Name conflict, retrying...")
             CredebtorFactory.create_batch(50)
         for _ in range(20):
             # add 20 more credebtors to random existing chains
@@ -856,10 +868,18 @@ class Command(BaseCommand):
             capacity=50,
         )
         locations["food_area"] = EventLocation.objects.create(
-            name="Food Area", slug="food-area", icon="utensils", camp=camp, capacity=50,
+            name="Food Area",
+            slug="food-area",
+            icon="utensils",
+            camp=camp,
+            capacity=50,
         )
         locations["infodesk"] = EventLocation.objects.create(
-            name="Infodesk", slug="infodesk", icon="info", camp=camp, capacity=20,
+            name="Infodesk",
+            slug="infodesk",
+            icon="info",
+            camp=camp,
+            capacity=20,
         )
 
         # add workshop room conflicts (the big root can not be used while either