Add patch tag infrastructure

This change add patch 'tags', eg 'Acked-by' / 'Reviewed-by', etc., to
patchwork.

Tag parsing is implemented in the patch parser's extract_tags function,
which returns a Counter object of the tags in a comment. These are
stored in the PatchTag (keyed to Tag) objects associated with each
patch.

We need to ensure that the main patch lists do not cause per-patch
queries on the Patch.tags ManyToManyField (this would result in ~500
queries per page), so we introduce a new QuerySet (and Manager) for
Patch, adding a with_tag_counts() method to populate the tag counts in a
single query.

As users may be migrating from previous patchwork versions (ie, with no
tag counts in the database), we add a 'retag' management command.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/sql/grant-all.mysql.sql b/lib/sql/grant-all.mysql.sql
index a307675..6a3d547 100644
--- a/lib/sql/grant-all.mysql.sql
+++ b/lib/sql/grant-all.mysql.sql
@@ -23,13 +23,17 @@ GRANT SELECT, UPDATE, INSERT, DELETE ON patchwork_bundlepatch TO 'www-data'@loca
 GRANT SELECT, UPDATE, INSERT, DELETE ON patchwork_patch TO 'www-data'@localhost;
 GRANT SELECT, UPDATE, INSERT, DELETE ON patchwork_emailoptout TO 'www-data'@localhost;
 GRANT SELECT, UPDATE, INSERT, DELETE ON patchwork_patchchangenotification TO 'www-data'@localhost;
+GRANT SELECT, UPDATE, INSERT, DELETE ON patchwork_tag TO 'www-data'@localhost;
+GRANT SELECT, UPDATE, INSERT, DELETE ON patchwork_patchtag TO 'www-data'@localhost;
 
 -- allow the mail user (in this case, 'nobody') to add patches
 GRANT INSERT, SELECT ON patchwork_patch TO 'nobody'@localhost;
 GRANT INSERT, SELECT ON patchwork_comment TO 'nobody'@localhost;
 GRANT INSERT, SELECT ON patchwork_person TO 'nobody'@localhost;
+GRANT INSERT, SELECT, UPDATE, DELETE ON patchwork_patchtag TO 'nobody'@localhost;
 GRANT SELECT ON	patchwork_project TO 'nobody'@localhost;
 GRANT SELECT ON patchwork_state TO 'nobody'@localhost;
+GRANT SELECT ON patchwork_tag TO 'nobody'@localhost;
 
 COMMIT;