NAME

Class::DBI::TempEssential - CDBI extension for temporary essentials

SYNOPSIS

  use Class::DBI::TempEssential;

  # $cdbi_table ISA Class::DBI table
  my @new_essential = qw/col1 col5 col7/;
  my $tempEssential = new Class::DBI::TempEssential($cdbi_table,
						    @new_essential);

  # do what you want to do with this essential setting

  undef $tempEssential; # or get out of my-scope
  # you have your old setting back

DESCRIPTION

TempEssential modifies the Essential columns of a Class::DBI table. It reverts the original Essential columns when getting out of scope.

FUNCTIONS

new

ARGS: $cdbi-class, @essential_columns RETURNS: $self

set_essential ARGS: $self, @essential_columns RETURNS: @old_essential_columns

change the essential columns again

reset_essential ARGS: $self RETURNS: @old_essential_columns

revert the essential columns to the original one

EXPORT

None by default.

BUGS / CAVEATS

When using several temp-essential columns on the same class on the same time, the user has to make sure, that the destruction work in reverse order to construction, i.e.

my $tmp1 = new Class::DBI::TempEssential($cdbi_table,@new_essential1);
my $tmp2 = new Class::DBI::TempEssential($cdbi_table,@new_essential2);
...
undef $tmp2;
undef $tmp1;

In particular:

my $tmp = new Class::DBI::TempEssential($cdbi_table,@new_essential1);
undef $tmp; # important since perl will use different distruction order
$tmp = new Class::DBI::TempEssential($cdbi_table,@new_essential2);

AUTHOR

H. Klein, <H.Klein@gmx.net>

SEE ALSO

perl.