add in_use field to gsr + make better admin page

backend/gsr_booking/admin.py

@@ -7,8 +7,17 @@ class GroupMembershipAdmin(admin.ModelAdmin):
     search_fields = ["user__username__icontains", "group__name__icontains"]
 
 
+class GSRAdmin(admin.ModelAdmin):
+    def get_queryset(self, request):
+        return GSR.all_objects.all()
+
+    list_display = ["name", "kind", "lid", "gid", "in_use"]
+    search_fields = ["name", "lid", "gid"]
+    ordering = ["-in_use"]
+
+
 admin.site.register(Group)
 admin.site.register(GroupMembership, GroupMembershipAdmin)
-admin.site.register(GSR)
+admin.site.register(GSR, GSRAdmin)
 admin.site.register(GSRBooking)
 admin.site.register(Reservation)

backend/gsr_booking/migrations/0012_gsr_in_use.py

@@ -0,0 +1,16 @@
+# Generated by Django 3.2.22 on 2024-02-28 21:44
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("gsr_booking", "0011_alter_reservation_group"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="gsr", name="in_use", field=models.BooleanField(default=True),
+        ),
+    ]

backend/gsr_booking/models.py

@@ -84,6 +84,11 @@ def save(self, *args, **kwargs):
         )
 
 
+class GSRManager(models.Manager):
+    def get_queryset(self):
+        return super().get_queryset().filter(in_use=True)
+
+
 class GSR(models.Model):
 
     KIND_WHARTON = "WHARTON"
@@ -96,6 +101,11 @@ class GSR(models.Model):
     name = models.CharField(max_length=255)
     image_url = models.URLField()
 
+    in_use = models.BooleanField(default=True)
+
+    objects = GSRManager()
+    all_objects = models.Manager()  # for admin page
+
     def __str__(self):
         return f"{self.lid}-{self.gid}"