i have some data in Mongo. I want to get keys from that like  keys $data{$date}{$err_id}{'Total_calls'} It works in perl hash. But how to get that from Mongo. I tried like this but not working.

 

for (my $priday=int($day); $priday >=1 ; $priday--)
{
    my $old_print_date=sprintf('%02d-%02d-%04d',$priday,$month,$year);
    $date = sprintf('%02d%02d%04d',$priday,$month,$year);
    my $data = $collection->find({'date' => "$old_print_date"});
    while (my $doc = $data->next)
    {
                $row = 1;
                $worksheet->write( $row, $col, sprintf('%0d', $doc{$da
+te}{'Total'}{"305"}), $format2);
                $row++;
                $worksheet->write( $row, $col, sprintf('%0d', $doc{$da
+te}{'Pre'}{"305"}), $format2);
                $row++;
                $worksheet->write( $row, $col, sprintf('%0d', $doc{$da
+te}{'Post'}{"305"}), $format2);
                $row++;
      }
}
[download]

Sample data

 

'27112015' => {
                          '25' => {
                                    'Total_calls' => {
                                                       '11' => 11,
                                                       '21' => 13,
                                                       '17' => 44,
                                                       '02' => 1,
                                                       '22' => 18,
                                                       '18' => 29,
                                                       '08' => 11,
                                                       '23' => 8,
                                                       '16' => 22,
                                                       '13' => 30,
                                                       '06' => 1,
                                                       '01' => 3,
                                                       '12' => 20,
                                                       '20' => 28,
                                                       '14' => 18,
                                                       '15' => 17,
                                                       '07' => 2,
                                                       '10' => 30,
                                                       '19' => 28,
                                                       '09' => 7
                                                     }
                                  },
                          'Total' => {
                                       '25' => 341,
                                       '305' => 23
                                     },
                          'Post' => {
                                      '25' => 216,
                                      '305' => 23
                                    },
                          'Pre' => {
                                     '25' => 125
                                   },
                          '305' => {
                                     'Total_calls' => {
                                                        '11' => 13,
                                                        '15' => 10
                                                      }
                                   }
                        },
          'date' => '27-11-2015'
[download]