db: make sure to close the read-only database instances

1 files changed, 7 insertions, 5 deletions

diff --git a/alot/db/thread.py b/alot/db/thread.py
index 1f9ae7f0..37cc5fc7 100644
--- a/alot/db/thread.py
+++ b/alot/db/thread.py
@@ -61,13 +61,10 @@ class Thread:
         self.message_list      = []
         self.messages          = {}
 
-        self.refresh(thread)
+        self._refresh(thread)
 
-    def refresh(self, thread = None):
+    def _refresh(self, thread):
         """refresh thread metadata from the index"""
-        if not thread:
-            thread = self._dbman._get_notmuch_thread(self.id)
-
         self.total_messages = len(thread)
         self._notmuch_authors_string = thread.authors
 
@@ -97,6 +94,11 @@ class Thread:
 
         self.messages, self.toplevel_messages, self.message_list = self._gather_messages(thread)
 
+    def refresh(self):
+        with self._dbman._db_ro() as db:
+            thread = self._dbman._get_notmuch_thread(db, self.id)
+            self._refresh(thread)
+
     def _gather_messages(self, thread):
         msgs     = {}
         msg_tree = []