Re: [htmltmpl] Templates with template loops within templates
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Re: [htmltmpl] Templates with template loops within templates
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From: Mathew R. <mat...@re...> - 2004-12-16 23:54:39
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Hi Eric,
It sounds like you have hit the dreaded "top level param, not referenced =
before use in template loop, so I'll just do nothing" bug... try this =
somewhere before your first TMPL_LOOP (say at the top of the file), in =
your first template:
<!-- H::T BUG: <TMPL_VAR URL_BASE> -->
which _should_ do absolutely nothing useful/harmful to the html output. =
However, it will result in H:T actually getting a reference to the =
URL_BASE variable.
What you were expecting to happen (ie template variable used in some =
child template, when being set at the top-level), is what most people =
expect to happen... In my own templates, I have also hit this problem.
This bug is a result of how H::T handles TMPL_LOOP invocations... it =
basically does a recursive call of itself, passing the known params from =
the previous instance, into this new invocation. Since the previous =
invocation hasn't referenced the TMPL_VAR, that value isn't passed into =
the TMPL_LOOP invocation.
Hope this helps,
Mathew
----- Original Message -----=20
From: "Eric Frazier" <er...@dm...>
To: <htm...@li...>
Sent: Friday, December 17, 2004 10:39 AM
Subject: [htmltmpl] Templates with template loops within templates
> Hi,
>=20
> Great subject line huh? :)
>=20
> Ok we have a template.
> Inside that template we load in from a database a template with its =
own=20
> vars which makes use of a template loop.
> In that second template we have a var called URL_BASE which is the =
base=20
> path. It works inside the second template, except for within the =
template=20
> loop output.
>=20
>=20
> So imagine we already have template object: $template (it by the way =
has a=20
> var called URL_BASE also that I thought would be passed down to this =
inside=20
> template as well)
>=20
> my $shipping_temp =3D=20
> $config->getShipping_temp($self->param('DEFAULT_PRODUCT')); ## returns =
> array ref
> my $ship_list_hash =3D $config->getShipping_list($instance,$dom_int);
>=20
> $template->param(SHIPPING =3D> '1'); ## part of the top level template
>=20
> my $shipref =3D \$shipping_temp->[0];
>=20
> my $ship_html =3D HTML::Template->new( scalarref =3D> $shipref,
> die_on_bad_params =3D>0);
> my @loop_values =3D ();
> my $num_options =3D keys(%$ship_list_hash);
>=20
> foreach my $key( keys(%$ship_list_hash) ){
>=20
> my %inside_hash =3D ('S_ICON' =3D>=20
> $ship_list_hash->{$key}{'courier_icon_url'},
> 'S_COURIER' =3D> =
$ship_list_hash->{$key}{'courier_name'},
> 'S_METHOD' =3D> =
$ship_list_hash->{$key}{'courier_method'} ,
> 'S_METHOD_ID' =3D> =
$ship_list_hash->{$key}{'ship_method_id'},
> 'S_COST' =3D>=20
> $ship_list_hash->{$key}{'shipping_cost'}=20
>=20
> );
>=20
> if ($shipping_temp->[1] eq=20
> $ship_list_hash->{$key}{'ship_method_id'}){
> $inside_hash{'DEFAULT'} =3D 'Checked';
> }
>=20
> if ($num_options < 2){
> $inside_hash{'DEFAULT'} =3D 'Checked';
> }
>=20
>=20
> push(@loop_values,\%inside_hash);
>=20
> }
> $ship_html->param(URL_BASE =3D> =
$self->param('URL_BASE')); ##=20
> the problem var
> $ship_html->param(SHIP_LOOP =3D> \@loop_values);
>=20
>=20
> my $tmpout =3D $ship_html->output();
>=20
>=20
>=20
> Below is the raw HTML output produced, notice the spacer.gif has a =
full url=20
> where the ups_2D.gif which comes from the loop does not.
>=20
> I was a little confused to start off with because I thought the =
presence of=20
> the URL_BASE in the second template would be parsed as a result of =
being=20
> set in the original top level template. So not only does that not seem =
to=20
> be happening, but also when setting the var again in the second =
template it=20
> is not working inside the template loop. So my first question, is this =
the=20
> way HTML::Template should be working? I didn't expect this problem. =
The=20
> next question of course is how can I get this var to be parsed inside =
the=20
> loop?
>=20
> Using the current versions of both HTML::Template and CGI::Application
>=20
> Please let me know if this is enough info or too much, I wanted to =
give as=20
> much detail as I could because I found it hard to explain what I am =
doing=20
> with just words.
>=20
>=20
> Thanks,
>=20
> Eric
>=20
>=20
> <!--Start of Shipping type Section=20
> -->
> <TABLE WIDTH=3D700 class=3D"bord" BORDER=3D0 CELLPADDING=3D2 =
CELLSPACING=3D0=20
> align=3D"center">
> <TR>=20
>=20
> <TD class=3D"bord" align=3D"center"><span=20
> class=3D"title">Shipping Method</span></TD>
> </TR>=20
>=20
> <TR>=20
>=20
> <TD>=20
>=20
> <!--second color=20
> table-->
> <TABLE WIDTH=3D700 class=3D"main" BORDER=3D0 =
> CELLPADDING=3D10 CELLSPACING=3D0 align=3D"center">
> <TR>=20
>=20
> <TD class=3D"main"=20
> align=3D"center">
> <!--pieces=20
> table-->
> <TABLE WIDTH=3D95% BORDER=3D0 =
CELLPADDING=3D0=20
> CELLSPACING=3D0 align=3D"center">
> <tr>=20
>=20
> <td><IMG=20
> SRC=3D"https://www.host.com/htmltemp_consol/images/spacer.gif" =
WIDTH=3D10=20
> HEIGHT=3D5></TD>
> </tr>=20
>=20
> <tr>
> <td>
> <table align=3D"center">
> <tr>
>=20
>=20
>=20
> <label=20
> for=3D"ship4">=20
>=20
> <TD width=3D15 align=3D"right"><input type=3Dradio =
id=3D"ship4"=20
> name=3D"ship_option" value=3D"4" Checked></TD>
> <TD width=3D65 class=3D"boxfields" align=3D"center" =
valign=3D"top">
> <img src=3D"images/shipping/ups_2D.gif" alt=3D"LEM =
Domestic=20
> "><br><b>$10.00</b></TD>
> </label>
>=20
> </tr>
> </table>
> </td>
> </tr>=20
>=20
> <tr>=20
>=20
> <td><IMG=20
> SRC=3D"https://www.host.com/htmltemp_consol/images/spacer.gif" =
WIDTH=3D10=20
> HEIGHT=3D5></TD>
> </tr>=20
>=20
> </table>=20
>=20
> <!--end of pieces=20
> table-->
> </td>=20
>=20
> </tr>=20
>=20
> </table>=20
>=20
> <!--end of second color=20
> table-->
> </TD>=20
>=20
> </TR>=20
>=20
> </table>=20
>=20
> <!--end of Shipping type Section-->
>=20
>=20
>=20
>=20
>=20
>=20
>=20
>=20
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