You might want to look at two cunning modules by Michael Schwern/Tony Bowden,
Ima::DBI and
Class::DBI. The first gives all your classes nice cached DBI handles and SQL statements. In your class you set up your SQL statements:
My::User->set_sql(
'getUsers', 'select * from users', 'Main'
);
Which you can then retrieve in anything that uses the class:
my $sth = My::User->sql_getUsers;
$sth->execute();
# etc
I like this approach because all the SQL lives in a seperate module and doesn't mess up your main application. It also has some handy shortcuts like:
$sth->execute([qw/value1 value2/], [\my $res1]);
my %hash = $sth->fetch_hash;
Now Class::DBI is a great abstraction layer if, like me, you don't like to play with SQL at all. An example:
package User;
use base 'Class::DBI';
User->table('users');
User->columns('All', qw/id name password/);
User->coumns('Primary', 'id');
User->set_db('Main', 'dbi:mysql', 'gav', 'perlmonks');
Now like magic you have a class to talk to the database and hide you from the horrors of SQL:
my $user1 = User->new({ name => 'gav', password => 'monk' });
my $user2 = User->retrieve(1023);
printf "Id: %d, Name: %s, Pass %s\n", $user2->id, $user2->name,
$user2->password;
or
my $user = User->search(name => 'gav');
if ($user && ($user = $user->next) && $user->password eq 'monk') {
print "Welcome gav^!\n";
} else {
print "Schoo!\n";
}
This came out a bit longer than I expected, but I hope it might help somebody :)
gav^
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