[FIX] add purge to ensure that database is clear when dls complete

app.py

@@ -25,7 +25,8 @@ def process_downloads():
             Album.write(album['id'], {'downloading': True})
             download_album(album)
     else:
-            return
+        # Sometimes the records are not being removed
+        Album.purge()
 
 
 cron = BackgroundScheduler({'apscheduler.job_defaults.max_instances': 3}, daemon=True)

database.py

@@ -83,3 +83,6 @@ class Model:
     def unlink(self, record_id):
         self.env.delete_by_id(record_id)
         return True
+
+    def purge(self):
+        self.env.purge()

database/album.json

@@ -1,12 +1,5 @@
 {
     "version": 2,
-    "keys": [
+    "keys": [],
-        "album",
-        "artist",
-        "cover",
-        "downloaded",
-        "downloading",
-        "link"
-    ],
     "data": {}
 }