From 9703d3068e62b9d421ce8838455e82dec5d7aeed Mon Sep 17 00:00:00 2001
From: Guilherme Danno <guilherme.danno@gmail.com>
Date: Sun, 22 Aug 2021 04:45:14 -0300
Subject: [PATCH] fix: invert loop use only known fields

---
 beetsplug/series.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/beetsplug/series.py b/beetsplug/series.py
index 3d32f14e2..35bb51af9 100644
--- a/beetsplug/series.py
+++ b/beetsplug/series.py
@@ -164,6 +164,7 @@ class SeriesProvider:
 
 class MbSeriesPlugin(BeetsPlugin):
 
+    # Mapping between internal names and musicbrainz attributes
     mapping = {
         'id': 'id',
         'name': 'name',
@@ -262,10 +263,10 @@ class MbSeriesPlugin(BeetsPlugin):
             return
 
         fields = []
-        for key, field in self.config['fields'].items():
-            if field['write']:
-                field['attr'] = self.mapping[key]
-                fields.append(field)
+        for field, external_field in self.mapping.items():
+            if self.config['fields'][field]['write']:
+                self.config['fields'][field]['attr'] = external_field
+                fields.append(self.config['fields'][field])
 
         for a in [a for a in lib.albums(query) if self.is_mb_release(a)]:
             mbid = series['type'].get_field(a)