Fix tag_list_editor.py to use ids when deleting tags

src/calibre/gui2/dialogs/tag_list_editor.py

@@ -48,7 +48,7 @@ class TagListEditor(QDialog, Ui_TagListEditor):
                              'The tag %s is already used.'%(item.text())).exec_()
                 item.setText(self.item_before_editing.text())
                 return
-            id,ign = self.item_before_editing.data(Qt.UserRole).toInt()
+            (id,_) = self.item_before_editing.data(Qt.UserRole).toInt()
             self.to_rename[item.text()] = id
 
     def rename_tag(self):
@@ -82,13 +82,14 @@ class TagListEditor(QDialog, Ui_TagListEditor):
                 deletes += confirms
 
         for item in deletes:
-            self.to_delete.append(item)
+            (id,_) = item.data(Qt.UserRole).toInt()
+            self.to_delete.append(id)
             self.available_tags.takeItem(self.available_tags.row(item))
 
     def accept(self):
         for text in self.to_rename:
-            self.db.rename_tag(self.to_rename[text], unicode(text))
+            self.db.rename_tag(id=self.to_rename[text], new_name=unicode(text))
         for item in self.to_delete:
-            self.db.delete_tag(unicode(item.text()))
+            self.db.delete_tag_using_id(item)
         QDialog.accept(self)
 

src/calibre/library/database2.py

@@ -987,16 +987,13 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
 
     # Convenience method for tags_list_editor
     def get_tags_with_ids(self):
-        result = self.conn.get('SELECT * FROM tags')
+        result = self.conn.get('SELECT id,name FROM tags')
         if not result:
-            return {}
-        r = []
-        for k,v in result:
-            r.append((k,v))
-        return r
+            return []
+        return result
 
-    def rename_tag(self, id, new):
-        self.conn.execute('UPDATE tags SET name=? WHERE id=?', (new, id))
+    def rename_tag(self, id, new_name):
+        self.conn.execute('UPDATE tags SET name=? WHERE id=?', (new_name, id))
         self.conn.commit()
 
     def get_tags(self, id):
@@ -1083,6 +1080,11 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
                 self.conn.execute('DELETE FROM tags WHERE id=?', (id,))
                 self.conn.commit()
 
+    def delete_tag_using_id(self, id):
+        if id:
+            self.conn.execute('DELETE FROM books_tags_link WHERE tag=?', (id,))
+            self.conn.execute('DELETE FROM tags WHERE id=?', (id,))
+            self.conn.commit()
 
     def set_series(self, id, series, notify=True):
         self.conn.execute('DELETE FROM books_series_link WHERE book=?',(id,))