in reply to Cannot clear cgi param (if it's really what I need to do)

According to the CGI documentation (under "CREATING FILL-OUT FORMS"), you have to tell it that you really mean for the parameter to be what you asked it to be. (I have found this behavior annoying frequently, but it is documented.) 

use CGI;

my $cgi = CGI->new();
$cgi->param( 'mode', 'orig' );
print $cgi->hidden( 'mode', 'second arg' ), "\n";
print $cgi->hidden( -name     => 'mode',
                    -default  => 'default', ), "\n";
print $cgi->hidden( -name     => 'mode',
                    -default  => 'forced',
                    -override => 1 ), "\n";
__END__
<input type="hidden" name="mode" value="orig"  />
<input type="hidden" name="mode" value="orig"  />
<input type="hidden" name="mode" value="forced"  />

[download]

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Re^2: Cannot clear cgi param (if it's really what I need to do)
by lepetitalbert (Abbot) on Jan 30, 2008 at 18:34 UTC

    Hi kyle,

    I came accross the '-override', but as I

    print hidden();

instead of

print $cgi->hidden()

    [download]

    it has no effect.

    Thank you.

    Have a nice day

    "There is only one good, namely knowledge, and only one evil, namely ignorance." Socrates
[reply]
[d/l]

      This does not appear to be the case. 

      BEGIN {
    $ENV{QUERY_STRING} = 'mode=orig';
    $ENV{REQUEST_METHOD} = 'GET';
}
use CGI qw( hidden );

print hidden( 'mode', 'second arg' ), "\n";
print hidden( -name     => 'mode',
              -default  => 'default', ), "\n";
print hidden( -name     => 'mode',
              -default  => 'forced',
              -override => 1 ), "\n";
__END__
<input type="hidden" name="mode" value="orig"  />
<input type="hidden" name="mode" value="orig"  />
<input type="hidden" name="mode" value="forced"  />

      [download]

      Perhaps your code is doing something different from what you think it's doing?

[reply]
[d/l]

        Hi kyle,

        As I print other hidden params 

        print hidden( 'day' , $day );

        [download]

        I printed this one 

        print hidden( 'mode' , 'save' , 1 );

        [download]

        and this don't work. 

        print hidden( -name => 'mode' , -default => 'save' , -override => 1);

        [download]

        works, but I don't understand why ?

        Have a nice day.

        "There is only one good, namely knowledge, and only one evil, namely ignorance." Socrates
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