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Manual Reference Pages  -  CLASS::DBI::COLUMNGROUPER (3)

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NAME

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

CONTENTS

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.

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perl v5.20.3 CLASS::DBI::COLUMNGROUPER (3) 2005-09-14

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