Gossamer Forum: Products: Gossamer Links: Development, Plugins and Globals: Passing hash to global in template?

Jun 15, 2002, 2:02 PM

ryel01

Veteran (1264 posts)

Jun 15, 2002, 2:02 PM

Post #1 of 6

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Passing hash to global in template?

hi,

can someone tell me how to pass a hash to a global function in a template tag?

what i've currently got is this, but it's not being passed in as a hash for some reason...

Code:
<%mytag ({ row => 5, cols => 20})%>

thanks

regan.

Last edited by:

ryel01: Jun 15, 2002, 2:03 PM

Jun 17, 2002, 10:55 AM

Alex

Administrator (9387 posts)

Jun 17, 2002, 10:55 AM

Post #2 of 6

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Re: [ryel01] Passing hash to global in template? In reply to

Don't use references, do:

<%mytag( foo => 1, bar => 2 )%>

and then in your global:

my %hash = @_;
print $hash{foo}, $hash{bar};

Cheers,

Alex
--
Gossamer Threads Inc.

Dec 13, 2002, 2:22 AM

webmaster33

Veteran (2312 posts)

Dec 13, 2002, 2:22 AM

Post #3 of 6

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Re: [Alex] Passing hash to global in template? In reply to

I need a global to check if a plugin is installed or not, so decide to execute the tag in the template or not.
This is how I would like to do:

Code:
<%if check_plugin( 'foo' => '1', 'bar' => '2' )%> 
<%Plugins::myplugin::function%><%endif%>

I also checked your code, and works fine:

Code:
<%mytag( foo => 1, bar => 2 )%> 

and then in your global: 

my %hash = @_; 
use Data::Dumper; 
print "<br>\n hash: " . Dumper(\%hash) . "<br>\n";

This works fine. Hash content will be: { 'foo' => '1', 'bar' => '2' }.

But if I place an 'if' statement before the global call, then will not print the hash as earlier Frown

Code:
<%if mytag( foo => 1, bar => 2 )%>

Hash content will be: { 'HASH(0x21cd8c8)' => undef }.

Why? What happens if I use 'if' statement? Does is pass arguments other way?

Best regards,
Webmaster33

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Dec 13, 2002, 3:21 AM

Jagerman

Staff (2198 posts)

Dec 13, 2002, 3:21 AM

Post #4 of 6

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Re: [webmaster33] Passing hash to global in template? In reply to

Hi,

I know about this problem with the template parser - basically, it needs some parser overhauling to compartmentalize and break down much of the parsing. We did try and hack that in at one point, but it ended up causing several failures in our template test script so unfortunately we had to remove it.

Right now, the best solution to your problem is to do this in two steps:

<%set have_plugin = check_plugin(foo => 1, bar => 2)%>
<%if have_plugin%><%Plugins::myplugin::function%><%endif%>

Also note that you can sort of call subroutines in an if, like this:

<%if Package::function%>

You can get away with passing arguments this way, but if you do so, be warned that it doesn't always work 100% correctly - if you have the word "and" or "or" in there, calling it that way will break things. By far the safest and most worry-free way when you need to pass arguments is to use the 'set', as I showed above.

Jason Rhinelander
Gossamer Threads
jason@gossamer-threads.com

Dec 13, 2002, 3:44 AM

webmaster33

Veteran (2312 posts)

Dec 13, 2002, 3:44 AM

Post #5 of 6

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Re: [Jagerman] Passing hash to global in template? In reply to

Thanks Jason, that you showed me the workarounds! Cool

Could you collect these KNOWN BUGS into a separate forum, similar to Official Bug Fixes forum?
This bug announce forum could be in category 'Gossamer Threads Inc./Links SQL', named as 'Official Known Bugs' forum. Also for each bug should be defined, if there is a workaround or not.
IMHO would be VERY useful.

Opinion?

Best regards,
Webmaster33

Dec 13, 2002, 6:49 AM

webmaster33

Veteran (2312 posts)

Dec 13, 2002, 6:49 AM

Post #6 of 6

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Re: [Jagerman] Passing hash to global in template? In reply to

Jason,

Unfortunately the following solution is not working Frown

:
<%if Plugins::myplugin::function%>
<%Plugins::myplugin::function%>
<%endif%>

Does it work for you?

Best regards,
Webmaster33

Last edited by:

webmaster33: Dec 13, 2002, 6:50 AM