[pmwiki-users] if exists conditional markup problem

[Peter Bowers]

Try turning on diagnostics and then loading with ?action=ruleset.

Confirm that the rule '{$Var}' occurs before the rule 'if'.

Confirm that the rule '{(' occurs before '{$Var}' -- oops! I just checked
it on my own system and '{$Var}' occurs before '{('. This will mean that
the variable-substitution will be attempted before you have created the
variable name using your markup expression. Of course the difficulty is
that often markup expressions use variables and so you wouldn't really want
to swap the order.  You may want to implement my '{earlymx(' rule that I
have in WikiSh.php.  The markup itself is about as ugly as I think could be
invented, but it will solve your problem. Other, more elegant, solutions
will hopefully be suggested by others.

-Peter

On Thu, Apr 2, 2015 at 11:51 AM, Criss Ittermann <crisses at kinhost.org>
wrote:

> Thank you, it spits out:
>
> (:if exists Profile-Data.{Members/Hosts$:201504} :) [...] (:else:) [...]
> (:if:)
>
> So the PTV does not appear to have been processed yet -- the markup
> expression has, though.  And this goes for ALL the PTVs throughout the
> entire IF condition, including the ones I've redacted with [...]
>
> However this violates documentation:
>
> Use page text variables in conditional markup
> <http://www.pmwiki.org/wiki/PmWiki/ConditionalMarkup>
> Page text variables will be assigned/evaluated *before* any conditional
> markup is evaluated. This effectively means that you cannot declare a PTV
> within an if...else condition; and also that a PTV will have a value even
> if it is set within a (:if false:)....(:if:) condition.
>
> on page
> http://www.pmwiki.org/wiki/PmWiki/PageTextVariables
>
> I upgraded to the latest version and it still doesn't work.  I turned off
> each recipe and commented out sections of code that even vaguely might
> affect conditional processing or PTV evaluation one at a time (it's a live
> site), and no change.  I did not comment out authentication, captcha or
> PmForm, since these would break the site in a very bad way and are released
> by PM & Petko.
>
> Just for giggles, to take the complexity out of the if-conditional, I even
> tried:
>
> TempVar:Profile-Data.{Members/Hosts$:{(ftime "%Y%m")}}
>
> (:if exists {$:TempVar} :)
>
> But of course, that failed too.  But the variable itself is set correctly.
>
> This fails too, whether I use the full expression, or the new variable:
>
> (:if equal "{$:TempVar}" "Profile-Data.HEdelman" :)
> revealing the if conditional before it processes:
> (:if equal "Profile-Data.{Members/Hosts$:201504}" "Profile-Data.HEdelman"
> :)
>
>
> (:if false:)
> TempVar:Profile-Data.{Members/Hosts$:{(ftime "%Y%m")}}
> (:if:)
>
> Still sets the variable.
>
> On Apr 1, 2015, at 8:25 PM, John Rankin <john.rankin at affinity.co.nz>
> wrote:
>
>  It may be possible to intercept the if code and find out what condition
> pmwiki is evaluating, which should give information about what is
> happening. Try this in local/config.php:
>
> $CondTextReplacement = "MyTempRepl(\$pagename, \$m[0], \$m[1])";
> function MyTempRepl($pagename, $text, $code='') {
>   echo $text;
>   return CondText2($pagename, $text, $code);
> }
>
> If I am reading stdmarkup.php correctly, this should echo the contents of
> the if code at the time the conditional is evaluated, which will show
> whether the var has been evaluated as intended.
>
> JR
>
> On 2/04/15 12:07 AM, Criss Ittermann wrote:
>
> I'm trying to figure out why this is returning false ("To be announced."):
>
>  (:if exists Profile-Data.{Members/Hosts$:{(ftime "%Y%m")}} :)
> ...
> (:else:)
> To be announced.
> (:ifend:)
>
>
>  When the following returns a fully functioning link to the correct page,
> which exists:
>
>  [[Profile-Data.{Members/Hosts$:{(ftime "%Y%m")}}]]
>
>
>  What am I doing wrong?
>
> Crisses
>
>
>
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>
>
> --
> John Rankin
> Affinity Limited
> T +64 4 495 3737
> M +64 21 726 546
>
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