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Share users database among many forums · **Released**: 07-10-2008

This is a feature requested many times, and we are still waiting, so I released a patch to be able to run many forums with the same user database.

This is an EXPERIMENTAL PATCH I'm running on my forums.

Code:

--- ../../../private/upload/includes/class_core.php     2008-07-10 11:17:32.000000000 +0200
+++ class_core.php      2008-07-11 17:44:20.000000000 +0200
@@ -405,6 +405,33 @@
                $this->connection_recent =& $link;
                $this->querycount++;

+               $shared_tables = Array("user","useractivation","userban","usertitle","userchangelog","usertextfield","userfield","usergroup","userlist","usernote","profilevisitor","reputation","reputationlevel","spamlog","strikes","pm","pmreceipt","pmtext","avatar","profilefield");
+
+               $main_prefix = "FP_";
+               foreach ($shared_tables as $shared_table)
+               {
+                       $orig = TABLE_PREFIX.$shared_table;
+                       $dst  = $main_prefix.$shared_table;
+
+                       $this->sql = str_replace($orig." ",$dst." "  ,$this->sql);
+                       $this->sql = str_replace($orig.".",$dst."."  ,$this->sql);
+                       $this->sql = str_replace($orig."\r",$dst."\r",$this->sql);
+                       $this->sql = str_replace($orig."\n",$dst."\n",$this->sql);
+                       $this->sql = str_replace($orig."\t",$dst."\t",$this->sql);
+
+               }
+

                if ($queryresult = $this->functions[$buffered ? 'query' : 'query_unbuffered']($this->sql, $link))
                {

You can add "session" to $shared_tables if you want to share your sessions among forums under the same domain (Thanks Lionel)

This is only useful for new forums joining anothers one user database.

Requirements:

An old forum where all users are.
Sharing the same database, using diferent prefixes for tables (TABLE_PREFIX)

For example: Imagine we have FORUM_A , FORUM_B, and FORUM_C each one with their respective licenses.

FORUM A has table prefix FA_ in database, FORUM_B has FB_ and FORUM_C has FC_

FORUM A is the main, and older forum, where we have all our users.

then we would install FORUM_B and FORUM_C normally, using the same database that FORUM_A uses, but setting up their own table prefixes.

once FB_ and FC_ are installed then we go patching class_core.php from FORUM_B and FORUM_C setting up $main_prefix = "FA_"; so they use FORUM_A for shared tables.

Possible problems:

memcached issues?, not sure
avatar/signature pics/etc issues when storage is set to disk.
more to come...

Author: Optimizacion Web

Lionel · #**102** 06-15-2009, 07:27 PM

none whatsoever. I only added sessions since the 2 forums are on same site so there was no need to re-login

webgroup · #**103** 06-16-2009, 10:17 PM

Im using 3.8.2, installed and worked like a charm the first time!
Thanks!!

webgroup · #**104** 06-16-2009, 10:18 PM

Quote:

Originally Posted by ROTPAR

Ok I got it working BUT I have 2 questions.

1.) Forum B does not show the registerd members in the forums statistics (bottom of the forums homepage)

2.) How can I show all online members on both forums. I want to show all current online members who are online on both forums.

MIne show registered users fine!
What I dont see is the current only users, I would like to be able to show it.

StonePilot · #**105** 06-17-2009, 08:12 AM

I would love to use this but I would have to be very caution when upgrading. Once I go down this road I would build the functioanlity of the site around the idea of a single login ability ... sign-up for one site and you're a member to all sites. Not sure what to think about that actually.

webgroup · #**106** 06-17-2009, 11:33 PM

Quote:

Originally Posted by Datenpapst

Hi,
is it possible that maybe some forums like off topic or so can also be used by more than 1 forum?

I need to know this too

Quote:

Originally Posted by Chunky Monkey

Can I somehow allow guests to view forums on installation B that guests are prevented from viewing on installation A? If so, how? Also, can I prevent other forums that exist at installation A from showing up at installation B?

Installation B's purpose will be to allow guests at domain B access to forums that are restricted on installation A at domain A. They should have the same users, same posts, etc. How can I accomplish this?

Thank you!

I need to know this too

webgroup · #**107** 06-18-2009, 12:02 AM

Quote:

Originally Posted by ROTPAR

Ok I got it working BUT I have 2 questions.

1.) Forum B does not show the registerd members in the forums statistics (bottom of the forums homepage)

2.) How can I show all online members on both forums. I want to show all current online members who are online on both forums.

Just add the "session" table to the list of shared tables.

webgroup · #**108** 06-18-2009, 12:07 AM

Quote:

Originally Posted by Datenpapst

Hi,
is it possible that maybe some forums like off topic or so can also be used by more than 1 forum?

I need to know this too

Quote:

Originally Posted by Chunky Monkey

Can I somehow allow guests to view forums on installation B that guests are prevented from viewing on installation A? If so, how? Also, can I prevent other forums that exist at installation A from showing up at installation B?

Installation B's purpose will be to allow guests at domain B access to forums that are restricted on installation A at domain A. They should have the same users, same posts, etc. How can I accomplish this?

Thank you!

I need to know this too

ALSO, I do not want to share the avatars or profile pictures.
I removed both the "avatar","profilefield" from the list of shared tables, still avatars and profile pictures are getting affected.

Both websites have custom avatars set to use DISK, not DB, but when you change the avatr in one website, it affects the avatar in the other website.

Can somebody explain me how to fix this?

AND the users signatures too, I dont want to share the signatures, is there any way to avoid it?

Thanks!

UPDATE: A "fix" for the avatar/picture profile issue, is to have the avatars in the "forumB" set to use DB storage.
Even when it do not makes sense to me why the problem was happening if I removed the "avatars" table from the shared table list.

Lionel · #**109** 06-18-2009, 07:17 AM

Quote:

Originally Posted by ROTPAR

1.) Forum B does not show the registerd members in the forums statistics (bottom of the forums homepage)

Showing the stats will not be possible, unless you do an Admicp => Maintenance=> Update counter => Username.

This is because that info is coming from the datastore which is not shared by the 2 installs, and is not recommended to share.

When you update the counter, you just rebuild the datastore for the appropriate forum. But that could be a pain to do once in a while ....

Lionel · #**110** 06-18-2009, 07:29 AM

you could also try to create a plugin at forumhome_start and put this in it (will add a query)

PHP Code:


			
require_once(DIR . '/includes/functions_databuild.php');
build_user_statistics();

That will update the datastore and you'll be able to display stats

webgroup · #**111** 06-18-2009, 05:17 PM

Could anybody help with my questions?

Thanks

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