From: Oleg Broytman <phd@phdru.name>
Date: Sat, 5 Mar 2016 23:10:36 +0000 (+0300)
Subject: Speedup counting books
X-Git-Tag: 0.0.4~50
X-Git-Url: https://git.phdru.name/?a=commitdiff_plain;h=4b5c30e8bbf62ad70791b3b11f57f83f27816583;p=m_librarian.git

Speedup counting books

Count books by author/genre using intermediate tables.
---

diff --git a/m_librarian/db.py b/m_librarian/db.py
index ba091f3..65c7987 100755
--- a/m_librarian/db.py
+++ b/m_librarian/db.py
@@ -167,13 +167,13 @@ def insert_author(surname, name, misc_name):
 
 def update_counters():
     for author in Author.select():
-        author.count = len(author.books)
+        author.count = AuthorBook.select(AuthorBook.q.author == author).count()
 
     for ext in Extension.select():
         ext.count = Book.select(Book.q.extension == ext.name).count()
 
     for genre in Genre.select():
-        genre.count = len(genre.books)
+        genre.count = BookGenre.select(BookGenre.q.genre == genre).count()
 
     for language in Language.select():
         language.count = Book.select(Book.q.language == language.name).count()