DBIx::Class::Weight
Provides methods for easily managing weighted rows.
Component requires you to specify a weight column, and optionally a subclass column
The weight column should contain unique integers.
If a subclass column is specificed, the weight column is assumed to have one unique group of integers for each subclass column.
In your Result class:
__PACKAGE__->load_components(qw/ Weight /);
__PACKAGE__->add_columns(
weight => { data_type => 'integer' },
weight_group => { data_type => 'integer' }, # optional
);
__PACKAGE__->weight_column('weight');
__PACKAGE__->weight_group_column('category'); # optional
Using the component
# When a row is created, weight column is automatically
# set to the current highest weight + 1, with L<next_weight>
$row = $schema->resultset('Thing')->create(\%thing);
# The weight values for the set can be easily adjusted
$row->weight_up;
$row->weight_down;
@rows = $rs->search(undef, {order_by => 'weight'});
Hook into insert, set the value of weight column to next available value
Get the next unused weight value
Move this record up in weight order
Move this record down in weight order
This module is free software under the perl5 license
(c) 2019 Mitch Jackson mitch@mitchjacksontech.com