the problem is i need to generate and validate mongo db quiries, iam writing the below module for validating query,i need to get an error message or some trip condition,the name of the collection acually present is 'student' but if i give 'studentgggggg' its not giving any error message ......please help me out

#!/usr/bin/perl
use MongoDB;
use JSON;
use Data::Dumper;
my $conn = MongoDB::Connection->new(
      host => 'xxxxxxx', 
      port => 27017, 
      username=>'xxxx',
      password=>'xxxx',
      db_name => 'prav'
  );
  my $database   = $conn->get_database( 'prav' );
  my $collection = $database->get_collection( 'studenttgggggg');
  my $err = $database->last_error();
    print Dumper $err;
  my $data       = $collection->find({"id"=>"stu_7"});
  my $err = $collection->last_error();
  # print %$err;
   print Dumper $err;
    #print Dumper $data;
while (my $doc = $data->next) {
       my @qual=@{$doc->{'qualifications'}};
       print @qual;
       print "\n";
    }

[download]

In reply to error catching in mongodb and perl by praveenchappa

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.