[wp-hackers] select all users with role X

Denis de Bernardy denis at semiologic.com
Tue Dec 27 03:48:32 GMT 2005

that's probably not an option with a large list. imho, create and maintain a
separate table.


> -----Original Message-----
> From: wp-hackers-bounces at lists.automattic.com 
> [mailto:wp-hackers-bounces at lists.automattic.com] On Behalf Of 
> Aaron Brazell
> Sent: Tuesday, December 27, 2005 4:22 AM
> To: wp-hackers at lists.automattic.com
> Subject: Re: [wp-hackers] select all users with role X
> On 12/26/05, Scott Merrill <skippy at skippy.net> wrote:
> 	I'd like to send an email to all the users with the 
> Administrator role.
> 	Since the roles are stored as a serialized array in the 
> usermeta table,
> 	I need to iterate over the entire user table to find all the
> 	administrators.  I _could_ cheat for the time being and use the 
> 	deprecated wp_user_level value, but that's just 
> avoiding the issue.
> 	In many circumstances, iterating over the user table 
> won't be a big
> 	deal, because the number of registered users is so 
> small.  This is,
> 	historically, because there is very little value for 
> readers to become
> 	registered users.  The newest version of my subscribe2 
> plugin is likely
> 	to change that, and I suspect that some of my users are 
> going to see
> 	some reasonably large user lists.  Iterating over these 
> to parse each
> 	array of roles seems like a real waste of an RDBMS.
> 	Short of re-working the roles and capabilities system, 
> does anyone have
> 	any tricks up their sleeves that might help? 
> 	Thanks,
> 	Scott
> Hmmmm... without iterating over the user table? Maybe create 
> an item in the options table with an array of user ids 
> updated whenever a user is added to the admin group?  Would 
> probably require a one time user table 
> scan when the plugin is installed to get all current admins 
> and could be added to after that.
> I almost think iterating over the entire table would be more 
> worthwhile, but I don't know.

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