From 2d00436a877371f862ec4166a23424c61c847af6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniele=20Vigan=C3=B2?= <daniele@vigano.me>
Date: Mon, 23 Dec 2024 01:50:58 +0100
Subject: [PATCH] Disable scales if no items are available

---
 ram/portal/templates/cards/scale.html | 2 +-
 ram/portal/views.py                   | 6 ++++--
 ram/ram/__init__.py                   | 2 +-
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/ram/portal/templates/cards/scale.html b/ram/portal/templates/cards/scale.html
index c2d8351..b80f1f2 100644
--- a/ram/portal/templates/cards/scale.html
+++ b/ram/portal/templates/cards/scale.html
@@ -28,7 +28,7 @@
               </tbody>
             </table>
             <div class="d-grid gap-2 mb-1 d-md-block">
-              <a class="btn btn-sm btn-outline-primary" href="{% url 'filtered' _filter="scale" search=d.item.slug %}">Show all rolling stock</a>
+              <a class="btn btn-sm btn-outline-primary{% if d.item.num_items == 0 %} disabled{% endif %}" href="{% url 'filtered' _filter="scale" search=d.item.slug %}">Show all rolling stock</a>
               {% if request.user.is_staff %}<a class="btn btn-sm btn-outline-danger" href="{% url 'admin:metadata_scale_change' d.item.pk %}">Edit</a>{% endif %}
             </div>
           </div>
diff --git a/ram/portal/views.py b/ram/portal/views.py
index 90594c1..b5f7393 100644
--- a/ram/portal/views.py
+++ b/ram/portal/views.py
@@ -7,7 +7,7 @@
 from django.views import View
 from django.http import Http404, HttpResponseBadRequest
 from django.db.utils import OperationalError, ProgrammingError
-from django.db.models import Q
+from django.db.models import Q, Count
 from django.shortcuts import render, get_object_or_404, get_list_or_404
 from django.core.exceptions import ObjectDoesNotExist
 from django.core.paginator import Paginator
@@ -507,7 +507,9 @@ class Scales(GetData):
     queryset = Scale.objects.all()
 
     def get_data(self, request):
-        return Scale.objects.all()
+        return Scale.objects.annotate(
+            num_items=Count("rollingstock")
+        )  # .filter(num_items__gt=0) to filter data with no items
 
 
 class Types(GetData):
diff --git a/ram/ram/__init__.py b/ram/ram/__init__.py
index 07f10a7..db52b91 100644
--- a/ram/ram/__init__.py
+++ b/ram/ram/__init__.py
@@ -1,4 +1,4 @@
 from ram.utils import git_suffix
 
-__version__ = "0.14.1"
+__version__ = "0.14.2"
 __version__ += git_suffix(__file__)