Comments on: Make sense of WordPress query functions

By: Rarst

Rarst — Sat, 14 May 2011 13:05:18 +0000

@kaiser Yep, but practice shows people commonly don't have a clue about WP_Error, how to catch it and what to do with it. Also it isn't returned consistently, same function can return that or something else on error under different conditions.

Why don’t you use threaded comments? Haven’t ever seen a reply in the style you use it over here before.

Custom made. :) I am not a huge fan of threaded comments, they tend to add a mess instead of solving it. I will probably revisit it when I get to updating the theme.

By: kaiser

kaiser — Sat, 14 May 2011 12:59:05 +0000

@Rarst

But afaik the error class is there since a much longer time… ;)

Btw: Why don’t you use threaded comments? Haven’t ever seen a reply in the style you use it over here before.

By: Rarst

Rarst — Thu, 12 May 2011 19:06:29 +0000

@kaiser _doing_it_wrong is very recent addition (WP 3.1), I hadn't even seen mentions of it yet - stumbled on it by chance in source several days ago. So hopefully it will see more use in the future.

By: kaiser

kaiser — Thu, 12 May 2011 18:56:09 +0000

One thing i really can’t understand: Why wordpress devs *never* make use of the error object to help people. I don’t know how often I’ve read the following sentence from “Otto”, who’s in the core dev team: “Then you’re doing it wrong(tm)”. I tend to say that I must have done something wrong, if the user couldn’t do it right. If you take a look at one of my plugins “easy pagination deamon”, then you’ll find the function “help()” inside the class that notifies the user if the template tag wasn’t placed right. It makes me close to angry, because i know there’s – aside from the error class – another useful function inside core: “_doing_it_wrong( $function, $message, $version )” – /core-root/wp-includes/functions.php…

By: Marcko

Marcko — Sat, 23 Apr 2011 23:06:57 +0000

Thank you for this overview

By: Rarst

Rarst — Wed, 13 Apr 2011 23:17:42 +0000

@finchamgroves Entirely different functions. wp_reset_postdata() restores (or at least tries to) global $post variable to original post. rewind_posts() resets internal query counter (for example if you want to loop through same set of posts twice).

By: finchamgroves

finchamgroves — Wed, 13 Apr 2011 23:12:32 +0000

Is there a difference between wp_reset_postdata() and rewind_posts() ?
It’s hard to find a comparison in the codex.

By: Rarst

Rarst — Tue, 12 Apr 2011 16:15:52 +0000

@finchamgroves

No problem. :) And I highly recommend http://wordpress.stackexchange.com/ if you want to seriously improve your WordPress skills.

By: finchamgroves

finchamgroves — Tue, 12 Apr 2011 16:00:29 +0000

@Rarst Many thanks. (It slows me down no end but I hate just using stuff without questioning why!)

By: Rarst

Rarst — Tue, 12 Apr 2011 14:45:06 +0000

@finchamgroves Yep, that is fine. Like $some_variable = new WP_Query(); or $some_variable = new WP_Query($some_query_arguments);

Some people seem to use this and I’m not sure why

Because they probably want to change main Loop temporarily for some reason, but don't have a clue how to use query_posts() and wp_reset_query(). Which they should be using, instead of that contraption.