Mojolicious::Lite：如何在使用“redirect_to”时传递参数；

Question

#!/usr/local/bin/perl
use warnings;
use 5.014;
use Mojolicious::Lite;
use DBI;

# ...

get '/choose' => sub {
    my $self = shift;
    my $lastname = $self->param( 'lastname' );
    my $sth = $dbh->prepare( "SELECT id, firstname, birthday FROM $table WHERE lastname == ?" );
    $sth->execute( $lastname );
    my @rows;
    while ( my $row = $sth->fetchrow_hashref ) {
        push @rows, { id => $row->{id}, firstname => $row->{firstname}, lastname => $lastname, birthday => $row->{birthday} };
    }
    if ( not @rows ) {
        $self->redirect_to( 'new_entry' );
    } elsif ( @rows == 1 ) {
        my $id = $rows[0]{id};
        $self->redirect_to( "/show_address?id=$id" );   # show_address needs parameter "id"
    } else {
        $self->stash( rows => \@rows );
        $self->render( 'choose' );
    }
};

# ...

当我使用 redirect_to 时，除了直接在 url 中写入参数（“/show_address?id=$id”）之外，是否还有其他方法来传递参数？

Answer 1

redirect_to 可以为您构建 url，并用您的参数替换路由中的占位符。

如果您需要使用参数构建 url，您可以执行以下操作：

my $url = $self->url_for("/show_address");
$self->redirect_to($url->query(id => $id));

另请注意，您可以通过设置 flash 变量来通过查询传递参数：
http://mojolicio.us/perldoc/Mojolicious/Controller#flash

该变量将被 Mojolicious 清理下一个请求。