Merge branch '546-blank-from-activity-field' into 'develop'

Resolve "music_album doesn't always need a from_activity_id"

Closes #546

See merge request funkwhale/funkwhale!430

api/funkwhale_api/music/models.py

@@ -41,7 +41,7 @@ class APIModelMixin(models.Model):
     mbid = models.UUIDField(unique=True, db_index=True, null=True, blank=True)
     uuid = models.UUIDField(unique=True, db_index=True, default=uuid.uuid4)
     from_activity = models.ForeignKey(
-        "federation.Activity", null=True, on_delete=models.SET_NULL
+        "federation.Activity", null=True, blank=True, on_delete=models.SET_NULL
     )
     api_includes = []
     creation_date = models.DateTimeField(default=timezone.now)

changes/changelog.d/546.enhancement

@@ -0,0 +1 @@
+Ensure from_activity field is not required in django's admin (#546)