NAME

Class::DBI::ColumnGrouper - Columns and Column Groups

SYNOPSIS

        my $colg = Class::DBI::ColumnGrouper->new;
           $colg->add_group(People => qw/star director producer/);

        my @cols = $colg->group_cols($group);

        my @all            = $colg->all_columns;
        my @pri_col        = $colg->primary;
        my @essential_cols = $colg->essential;

DESCRIPTION

Each Class::DBI class maintains a list of its columns as class data. This provides an interface to that. You probably don't want to be dealing with this directly.

METHODS

new

        my $colg = Class::DBI::ColumnGrouper->new;

A new blank ColumnnGrouper object.

clone

        my $colg2 = $colg->clone;

Clone an existing ColumnGrouper.

add_column / find_column

        $colg->add_column($name);
        my Class::DBI::Column $col = $colg->find_column($name);

Add or return a Column object for the given column name.

add_group

        $colg->add_group(People => qw/star director producer/);

This adds a list of columns as a column group.

group_cols / groups_for

        my @colg = $cols->group_cols($group);
        my @groups = $cols->groups_for(@cols);

This returns a list of all columns which are in the given group, or the groups a given column is in.

columns_in

        my @cols = $colg->columns_in(@groups);

This returns a list of all columns which are in the given groups.

all_columns

        my @all = $colg->all_columns;

This returns a list of all the real columns.

primary

        my $pri_col = $colg->primary;

This returns a list of the columns in the Primary group.

essential

        my @essential_cols = $colg->essential;

This returns a list of the columns in the Essential group.