NAME

CGI::Session::Driver::DBI - Base class for native DBI-related CGI::Session drivers

SYNOPSIS

    require CGI::Session::Driver::DBI;
    @ISA = qw( CGI::Session::Driver::DBI );

DESCRIPTION

In most cases you can create a new DBI-driven CGI::Session driver by simply creating an empty driver file that inherits from CGI::Session::Driver::DBI. That's exactly what sqlite does. The only reason why this class doesn't suit for a valid driver is its name isn't in lowercase. I'm serious!

NOTES

CGI::Session::Driver::DBI defines init() method, which makes DBI handle available for drivers in Handle - object attribute regardless of what "\%dsn_args" were used in creating session object. Should your driver require non-standard initialization you have to re-define init() method in your .pm file, but make sure to set 'Handle' - object attribute to database handle (returned by DBI->connect(...)) if you wish to inherit any of the methods from CGI::Session::Driver::DBI.

STORAGE

Before you can use any DBI-based session drivers you need to make sure compatible database table is created for CGI::Session to work with. Following command will produce minimal requirements in most SQL databases:

    CREATE TABLE sessions (
        id CHAR(32) NOT NULL PRIMARY KEY,
        a_session TEXT NOT NULL
    );

Your session table can define additional columns, but the above two are required. Name of the session table is expected to be sessions by default. You may use a different name if you wish. To do this you have to pass TableName as part of your " \%dsn_args ":

    $s = CGI::Session->new('driver:sqlite', undef, {TableName=>'my_sessions'});
    $s = CGI::Session->new('driver:mysql', undef,
    {
        TableName=>'my_sessions',
        DataSource=>'dbi:mysql:shopping_cart'.
    });

To use different column names, change the 'create table' statement, and then simply do this:

    $s = CGI::Session->new('driver:pg', undef,
    {
        TableName=>'session',
        IdColName=>'my_id',
        DataColName=>'my_data',
        DataSource=>'dbi:pg:dbname=project',
    });

    $s = CGI::Session->new('driver:pg', undef,
    {
        TableName=>'session',
        IdColName=>'my_id',
        DataColName=>'my_data',
        Handle=>$dbh,
    });

DRIVER ARGUMENTS

Following driver arguments are supported:

DataSource: First argument to be passed to DBI->connect(). If the driver makes the database connection itself, it will also explicitly disconnect from the database when the driver object is DESTROYed.
User: User privileged to connect to the database defined in "DataSource".
Password: Password of the User privileged to connect to the database defined in "DataSource"
Handle: An existing DBI database handle object. The handle can be created on demand by providing a code reference as a argument, such as "<sub{DBI-"connect}>>. This way, the database connection is only created if it actually needed. This can be useful when combined with a framework plugin like CGI::Application::Plugin::Session, which creates a CGI::Session object on demand as well.
"Handle" will override all the above arguments, if any present.
TableName: Name of the table session data will be stored in.

LICENSING

For support and licensing information see CGI::Session