無法調用「fetchrow_array」沒有包裝或對象引用

Question

我要選擇的數據形式的數據庫並顯示出來，但我有以下問題：Can't call method "fetchrow_array" without a package or object reference

test.pl
我的$ Q =新的CGI（）;

my $handle = Db::connection(); 

sub select{ 
    my $rData = { 
     table => 'student', 
     condition => { 
      ID => 100,    
     } 
    }; 
    return Db::select($rData); 
}; 

print $q->header; 
print $q->start_html(
    -title => "Main", 
    -style => {-src =>'/media/css/start/jquery-ui-1.10.3.custom.css" rel="stylesheet' }, 
    -script => [ 
     { -src=>'/media/js/jquery-1.9.1.js'}, 
     { -src=>'/media/js/jquery-ui-1.10.3.custom.js'}, 
     { -src=>'/media/js/jquery.dataTables.js'}, 
    ] 
); 

my $cScript = qq{ 
    \$(document).ready(function(){ 
     oTable = \$('#id_table').dataTable({ 
     "bJQueryUI": true, 
     "sPaginationType": "full_numbers",    
    });  

    \$("input[type=button], a, button") 
     .button() 
     .click(function(event){ 
     event.preventDefault(); 
     }); 
    });  
}; 

print $q->script($cScript); 

print start_form (-method => 'post', -action => ""); 

my @aRows; 
my $sqlSelect = Dbm::get_list({ 
     table => 'personi', 
     condition => { 
      ID => 100, 

     } 
    }); 

while (my @data = $sqlSelect->fetchrow_array()) {  
    my $cRowId = hidden('rowid', $data[0]); 
    my $bt1 = image_button({-src => '/media/images/delete_1.png', 
         -class => 'del', 
         -title => 'delete', 
         -name => 'delete', 
         -value => $data[0], 

    my $bt2 = image_button({-src => '/media/images/edit_1.png',-class => 'upd', -title => 'update', -name => 'update', -value => $data[0]});      

    push @aRows, ($cRowId, $q->Tr($q->td([$data[1], $data[2], $data[3], $bt1, $bt2]))); 
} 

print $q->table({-border => '1px solid green',-align =>'center', -width => '100%', -id => 'id_table'}, 
    thead($q->th(['Name', 'Surname', 'Age', 'Delete', 'Edit'])), 
    @aRows, 
); 

print $q->input({-type => 'button', -class => 'button', -onclick => "window.location.href='insert.pl';", -value => 'Shto'}); 
print $q->end_form; 

print test_select(); 

我不明白哪裏可能是問題。我是這種語言的新手，需要一些幫助

Answer 1

execute返回true/false而不是語句處理程序，但它看起來像是將該返回值分配給$sqlSelect。將get_list的返回值更改爲$sqlSelect。正在顯示

... 
    $sqlSelect->execute or die "can't execute the query: $sqlSelect->errstr"; 
    return $sqlSelect; 
} 

的特定錯誤是由於$sqlSelect因此是一個布爾值，而不是一個對象引用（並且因此不能有方法調用就可以了）。