How To Diagnose And Fix Incorrect Post Comment Counts In WordPress

Artem Russakovskii — Sun, 21 Mar 2010 10:42:10 +0000

Introduction

If your WordPress comment counts got messed up, whether because of a plugin (I'm talking about you, DISQUS) or you messed with your database manually and did something wrong (yup, that's what I just did), fear not – I have a solution for you.

But first, a little background.

Comment Counts In WordPress

Here's how comment counts work in WP:

Posts live in a table called wp_posts and each has an ID.
Comments reside in a table called wp_comments, each referring to an ID in wp_posts.
However, to make queries faster, the comment count is also cached in the wp_posts table, rather than getting calculated on every page load.
If this count ever gets out of sync with the actual number of comments for some reason, WordPress, while still displaying all comments properly, will simply show the wrong count.

How To Find Out Which Posts Are Out Of Sync

Fire up a MySQL shell or your favorite MySQL software (mine is Navicat) and run this query.

It assumes your database is called wordpress and the prefix is wp_, so adjust those accordingly.

SELECT wpp.id, wpp.post_title, wpp.comment_count, wpc.cnt
FROM wordpress.wp_posts wpp
LEFT JOIN
(SELECT comment_post_id AS c_post_id, count(*) AS cnt FROM wordpress.wp_comments
 WHERE comment_approved = 1 GROUP BY comment_post_id) wpc
ON wpp.id=wpc.c_post_id
WHERE wpp.post_type IN ('post', 'page')
      AND (wpp.comment_count!=wpc.cnt OR (wpp.comment_count != 0 AND wpc.cnt IS NULL));

The result of this query is a list of posts whose comment_counts differ from the actual number of comments associated with each of them.

The left count is the cached number, while the right one is the right one.

How To Fix The Counts Automatically

Please make a backup of your database before performing any altering queries such as the one below (I recommend mysqldump or the WP-DBManager plugin).

The following query will recalculate and fix the comment counts for all posts that are out of sync (ones we just queried for above):

UPDATE wordpress.wp_posts wpp
LEFT JOIN
(SELECT comment_post_id AS c_post_id, count(*) AS cnt FROM wordpress.wp_comments
 WHERE comment_approved = 1 GROUP BY comment_post_id) wpc
ON wpp.id=wpc.c_post_id
SET wpp.comment_count=wpc.cnt
WHERE wpp.post_type IN ('post', 'page')
      AND (wpp.comment_count!=wpc.cnt OR (wpp.comment_count != 0 AND wpc.cnt IS NULL));

I tested this approach on a few test cases but if you experience any problems, please do alert me in the comments and desribe your problem.

Happy WP hacking!

Online 642-892 training is the quickest way to pass 642-642 as well as 640-863 exams.

The Repositories For apt-get In SUSE 10.2

Artem Russakovskii — Tue, 10 Jul 2007 06:18:32 +0000

So today I was looking for a proper sources.list file that would work for apt-get in SUSE 10.2 since the one in yast and smart repositories comes with a broken list. And by broken I mean completely f***ed.

apt-get update
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386 release
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Get:1 ftp://ftp4.gwdg.de SuSE/10.2-i386 release
Ign ftp://ftp4.gwdg.de SuSE/10.2-i386 release
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/base pkglist
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/base release
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/update pkglist
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Get:1 ftp://ftp4.gwdg.de SuSE/10.2-i386/base pkglist
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/update release
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Err ftp://ftp4.gwdg.de SuSE/10.2-i386/base pkglist
Unable to fetch file, server said 'Failed to open file.  '
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/security pkglist
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Get:2 ftp://ftp4.gwdg.de SuSE/10.2-i386/base release
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/security release
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Ign ftp://ftp4.gwdg.de SuSE/10.2-i386/base release
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/rpmkeys pkglist
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Get:3 ftp://ftp4.gwdg.de SuSE/10.2-i386/update pkglist
Err ftp://mirrors.mathematik.uni-bielefeld.de SuSE/10.2-i386/rpmkeys release
Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Err ftp://ftp4.gwdg.de SuSE/10.2-i386/update pkglist
Unable to fetch file, server said 'Failed to open file.  '
Get:4 ftp://ftp4.gwdg.de SuSE/10.2-i386/update release
Ign ftp://ftp4.gwdg.de SuSE/10.2-i386/update release
Get:5 ftp://ftp4.gwdg.de SuSE/10.2-i386/security pkglist
Err ftp://ftp4.gwdg.de SuSE/10.2-i386/security pkglist
Unable to fetch file, server said 'Failed to open file.  '
Get:6 ftp://ftp4.gwdg.de SuSE/10.2-i386/security release
Ign ftp://ftp4.gwdg.de SuSE/10.2-i386/security release
Get:7 ftp://ftp4.gwdg.de SuSE/10.2-i386/rpmkeys pkglist
Err ftp://ftp4.gwdg.de SuSE/10.2-i386/rpmkeys pkglist
Unable to fetch file, server said 'Failed to open file.  '
Get:8 ftp://ftp4.gwdg.de SuSE/10.2-i386/rpmkeys release
Ign ftp://ftp4.gwdg.de SuSE/10.2-i386/rpmkeys release
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/release  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.base  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/release.base  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.update  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/release.update  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.security  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/release.security  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.rpmkeys  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/SuSE/10.2-i386/base/release.rpmkeys  Could not resolve 'mirrors.mathematik.uni-bielefeld.de'
Failed to fetch ftp://ftp4.gwdg.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.base  Unable to fetch file, server said 'Failed to open file.  '
Failed to fetch ftp://ftp4.gwdg.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.update  Unable to fetch file, server said 'Failed to open file.  '
Failed to fetch ftp://ftp4.gwdg.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.security  Unable to fetch file, server said 'Failed to open file.  '
Failed to fetch ftp://ftp4.gwdg.de/pub/linux/suse/apt/SuSE/10.2-i386/base/pkglist.rpmkeys  Unable to fetch file, server said 'Failed to open file.  '

The easiest solution is to download and install the rpms from ftp://ftp5.gwdg.de/pub/opensuse/repositories/home%3A/rbos/openSUSE_10.2/i586/ instead, which come with the correct sources.list as pointed to by this post. Here it is (with the additional sources uncommented):

# A very basic sources.list file.
#
# Fastest repository comes first, with netselect it is possible to determine
# the fastest repository easily.
 
repomd http://ftp-1.gwdg.de/pub/suse/i386 update/10.2
repomd http://ftp-1.gwdg.de/pub/opensuse/distribution 10.2/repo/oss/suse
 
# Visit http://software.opensuse.org/download/ to determine which additional
# components are available.  Some examples are given below, just uncomment
# the line to enable it.
 
repomd ftp://ftp-1.gwdg.de/pub/opensuse/repositories home:/rbos/openSUSE_10.2
repomd ftp://ftp-1.gwdg.de/pub/opensuse/repositories KDE:/KDE3/openSUSE_10.2
repomd ftp://ftp-1.gwdg.de/pub/opensuse/repositories KDE:/Backports/openSUSE_10.2
repomd ftp://ftp-1.gwdg.de/pub/opensuse/repositories KDE:/Playground/openSUSE_10.2
repomd ftp://ftp-1.gwdg.de/pub/opensuse/repositories mozilla/openSUSE_10.2
repomd ftp://ftp-1.gwdg.de/pub/opensuse/repositories openSUSE:/Tools/openSUSE_10.2
repomd ftp://ftp.gwdg.de/pub/linux/misc              packman/suse/10.2
 
# The apt format
# rpm ftp://mirrors.mathematik.uni-bielefeld.de/pub/linux/suse/apt/ @ftp_dir@ base update security rpmkeys
# rpm ftp://ftp4.gwdg.de/pub/linux/suse/apt/ @ftp_dir@ base update security rpmkeys

Updating this list produces a much nicer result:

apt update
Get:1 http://ftp-1.gwdg.de update/10.2 repomd.xml [1231B]
Get:2 http://ftp-1.gwdg.de 10.2/repo/oss/suse repomd.xml [951B]
Get:3 ftp://ftp-1.gwdg.de home:/rbos/openSUSE_10.2 repomd.xml [951B]
Get:4 ftp://ftp.gwdg.de packman/suse/10.2 repomd.xml [951B]
Get:5 ftp://ftp-1.gwdg.de KDE:/KDE3/openSUSE_10.2 repomd.xml [951B]
Get:6 ftp://ftp-1.gwdg.de KDE:/Backports/openSUSE_10.2 repomd.xml [951B]
Get:7 ftp://ftp-1.gwdg.de KDE:/Playground/openSUSE_10.2 repomd.xml [951B]
Get:8 ftp://ftp-1.gwdg.de mozilla/openSUSE_10.2 repomd.xml [951B]
Get:9 ftp://ftp-1.gwdg.de openSUSE:/Tools/openSUSE_10.2 repomd.xml [951B]
Fetched 8839B in 8s (1059B/s)
Get:1 http://ftp-1.gwdg.de update/10.2/ primary.xml [724kB]
Get:2 ftp://ftp-1.gwdg.de home:/rbos/openSUSE_10.2/ primary.xml [28.8kB]
Get:3 ftp://ftp.gwdg.de packman/suse/10.2/ primary.xml [2286kB]
Get:4 ftp://ftp-1.gwdg.de home:/rbos/openSUSE_10.2/ filelists.xml [46.5kB]
Get:5 http://ftp-1.gwdg.de update/10.2/ filelists.xml [4061kB]
Get:6 ftp://ftp-1.gwdg.de KDE:/KDE3/openSUSE_10.2/ primary.xml [112kB]
Get:7 ftp://ftp-1.gwdg.de KDE:/KDE3/openSUSE_10.2/ filelists.xml [1212kB]
Get:8 ftp://ftp.gwdg.de packman/suse/10.2/ filelists.xml [3021kB]
Get:9 ftp://ftp-1.gwdg.de KDE:/Backports/openSUSE_10.2/ primary.xml [174kB]
Get:10 ftp://ftp-1.gwdg.de KDE:/Backports/openSUSE_10.2/ filelists.xml [445kB]
Get:11 http://ftp-1.gwdg.de 10.2/repo/oss/suse/ primary.xml [6272kB]
Get:12 ftp://ftp-1.gwdg.de KDE:/Playground/openSUSE_10.2/ primary.xml [16.7kB]
Get:13 ftp://ftp-1.gwdg.de KDE:/Playground/openSUSE_10.2/ filelists.xml [39.0kB]
Get:14 ftp://ftp-1.gwdg.de mozilla/openSUSE_10.2/ primary.xml [22.8kB]
Get:15 ftp://ftp-1.gwdg.de mozilla/openSUSE_10.2/ filelists.xml [339kB]
Get:16 ftp://ftp-1.gwdg.de openSUSE:/Tools/openSUSE_10.2/ primary.xml [6095B]
Get:17 ftp://ftp-1.gwdg.de openSUSE:/Tools/openSUSE_10.2/ filelists.xml [14.5kB]
Get:18 http://ftp-1.gwdg.de 10.2/repo/oss/suse/ filelists.xml [12.4MB]
Fetched 31.2MB in 1m18s (400kB/s)
Reading Package Lists... Done
Building Dependency Tree... Done