feat: add MediaRendition model

Author: ianmeigh

src/wagtailmedia/migrations/0006_mediarendition.py

@@ -0,0 +1,55 @@
+# Generated by Django 5.2.6 on 2025-09-29 09:56
+
+import django.db.models.deletion
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("wagtailmedia", "0005_alter_media_options"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="MediaRendition",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("format_spec", models.JSONField()),
+                ("file", models.FileField(upload_to="media", verbose_name="file")),
+                (
+                    "created_at",
+                    models.DateTimeField(auto_now_add=True, verbose_name="created at"),
+                ),
+                (
+                    "created_by",
+                    models.ForeignKey(
+                        blank=True,
+                        editable=False,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        to=settings.AUTH_USER_MODEL,
+                        verbose_name="created by",
+                    ),
+                ),
+                (
+                    "media",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="renditions",
+                        to="wagtailmedia.media",
+                    ),
+                ),
+            ],
+        ),
+    ]

src/wagtailmedia/models.py

@@ -161,6 +161,31 @@ class Media(AbstractMedia):
     pass
 
 
+class MediaRendition(models.Model):
+    media = models.ForeignKey(
+        wagtailmedia_settings.MEDIA_MODEL,
+        on_delete=models.CASCADE,
+        related_name="renditions",
+    )
+
+    format_spec = models.JSONField()
+    file = models.FileField(upload_to="media", verbose_name=_("file"))
+
+    created_at = models.DateTimeField(verbose_name=_("created at"), auto_now_add=True)
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        verbose_name=_("created by"),
+        null=True,
+        blank=True,
+        editable=False,
+        on_delete=models.SET_NULL,
+    )
+
+    @property
+    def url(self):
+        return self.file.url
+
+
 def get_media_model():
     from django.apps import apps