Add global asset_count to ApplicationStats and surface in home page StatsBar

dandiapi/api/migrations/0031_applicationstats_asset_count.py

@@ -0,0 +1,28 @@
+# Generated by Django 5.2.7 on 2026-03-25 14:12
+from __future__ import annotations
+
+from django.db import migrations, models
+
+
+def populate_asset_count(apps, schema_editor):
+    Asset = apps.get_model('api.Asset')
+    ApplicationStats = apps.get_model('api.ApplicationStats')
+
+    asset_count = Asset.objects.filter(versions__isnull=False).distinct().count()
+
+    ApplicationStats.objects.update(asset_count=asset_count)
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('api', '0030_alter_asset_path'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='applicationstats',
+            name='asset_count',
+            field=models.PositiveBigIntegerField(default=0),
+        ),
+        migrations.RunPython(code=populate_asset_count, reverse_code=migrations.RunPython.noop),
+    ]

dandiapi/api/models/asset.py

@@ -353,3 +353,7 @@ def total_size(cls):
             or 0
             for cls in (AssetBlob, ZarrArchive)
         )
+
+    @classmethod
+    def total_count(cls):
+        return cls.objects.filter(versions__isnull=False).distinct().count()

dandiapi/api/models/stats.py

@@ -11,6 +11,7 @@ class ApplicationStats(models.Model):  # noqa: DJ008
     published_dandiset_count = models.PositiveIntegerField()
     user_count = models.PositiveIntegerField()
     size = models.PositiveBigIntegerField()
+    asset_count = models.PositiveBigIntegerField(default=0)
 
     class Meta:
         verbose_name_plural = 'Application Stats'

dandiapi/api/tasks/scheduled.py

@@ -153,6 +153,7 @@ def compute_application_stats() -> None:
         published_dandiset_count=Dandiset.published_count(),
         user_count=User.objects.filter(metadata__status=UserMetadata.Status.APPROVED).count(),
         size=Asset.total_size(),
+        asset_count=Asset.total_count(),
     )
 
 

dandiapi/api/tests/test_stats.py

@@ -14,6 +14,7 @@ def test_stats_baseline(api_client):
         'published_dandiset_count': 0,
         'user_count': 0,
         'size': 0,
+        'asset_count': 0,
     }
 
 
@@ -77,6 +78,20 @@ def test_stats_asset(api_client, version, asset):
     stats = api_client.get('/api/stats/').data
 
     assert stats['size'] == asset.size
+    assert stats['asset_count'] == 1
+
+
+@pytest.mark.django_db
+def test_stats_asset_count(api_client, version, asset_factory):
+    """Test that asset_count reflects the number of distinct assets in any version."""
+    assets = [asset_factory() for _ in range(3)]
+    for a in assets:
+        version.assets.add(a)
+
+    compute_application_stats()
+
+    stats = api_client.get('/api/stats/').data
+    assert stats['asset_count'] == 3
 
 
 @pytest.mark.django_db

web/src/views/HomeView/StatsBar.vue

@@ -10,8 +10,8 @@
       >
         <v-col
           class="py-0 flex-grow-1"
-          md="4"
-          sm="4"
+          md="3"
+          sm="3"
           cols="12"
         >
           <SingleStat
@@ -35,6 +35,7 @@ import SingleStat from '@/views/HomeView/SingleStat.vue';
 const dandisets = ref(0);
 const users = ref(0);
 const size = ref(0);
+const files = ref(0);
 
 const stats = computed(() => [
   {
@@ -43,6 +44,7 @@ const stats = computed(() => [
     description: 'A DANDI dataset including files and dataset-level metadata',
     href: '/dandiset',
   },
+  { name: 'files', value: files.value },
   { name: 'users', value: users.value },
   { name: 'total data size', value: filesize(size.value, { round: 0, base: 10, standard: 'iec' }) },
 ]);
@@ -52,5 +54,6 @@ dandiRest.stats().then((data) => {
   dandisets.value = data.dandiset_count;
   users.value = data.user_count;
   size.value = data.size;
+  files.value = data.asset_count;
 });
 </script>