File Coverage

blib/lib/App/DBCritic/Policy/DuplicateRelationships.pm

Criterion	Covered	Total	%
statement	27	27	100.0
branch			n/a
condition			n/a
subroutine	9	9	100.0
pod			n/a
total	36	36	100.0

package App::DBCritic::Policy::DuplicateRelationships;

use strict;
use utf8;
use Modern::Perl '2011';    ## no critic (Modules::ProhibitUseQuotedVersion)

our $VERSION = '0.022';     # VERSION
use Algorithm::Combinatorics 'combinations';
use Data::Compare;
use English '-no_match_vars';
use Moo;
use Sub::Quote;
use namespace::autoclean -also => qr{\A _}xms;

has description => (
    is      => 'ro',
    default => quote_sub q{'Duplicate relationships'},
);
has explanation => (
    is      => 'ro',
    default => quote_sub
        q{'Each connection between tables should only be expressed once.'},
);

sub violates {
    my $source = shift->element;
    return if $source->relationships < 2;

    return join "\n" => map { sprintf '%s and %s are duplicates', @{$_} }
        grep {
        Compare( map { $source->relationship_info($_) } @{$_} )
        } combinations( [ $source->relationships ], 2 );
}

with 'App::DBCritic::PolicyType::ResultSource';
1;

# ABSTRACT: Check for ResultSources with unnecessary duplicate relationships

__END__