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package SL::DB::Helper::Util;
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use strict;
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use Rose::DB::Object::Util;
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use parent qw(Exporter);
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our @EXPORT_OK = qw(is_unique);
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#
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# Public functions not exported by default
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#
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sub is_unique {
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my ($self, @columns) = @_;
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my @filter = map { ($_ => $self->$_) } @columns;
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if (Rose::DB::Object::Util::is_in_db($self)) {
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push @filter, map { ("!${_}" => $self->$_ )} $self->meta->primary_key;
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}
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return !$self->_get_manager_class->get_first(where => [ and => \@filter ]);
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}
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1;
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__END__
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=pod
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=encoding utf8
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=head1 NAME
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SL::DB::Helper::Util - Helper functions for Rose::DB::Object instances
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=head1 SYNOPSIS
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package SL::DB::AuthUser;
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use SL::DB::Helper::Util;
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sub validate {
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...
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if (!SL::DB::Helper::Util::is_unique($self, 'login')) {
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push @errors, "Login not unique";
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}
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}
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=head1 OVERVIEW
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This is a collection of assorted helper and utility functions for
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Rose::DB::Object instances that don't require full-blown mixin helpers
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like L<SL::DB::ActsAsList>. The module does not export any function by
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default, but all of the public ones can be requested in the usual
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way.
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Each function can be called either as fully qualified name with the
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object instance as the first argument or (if the function is imported)
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as an intance method on the object instance.
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=head1 FUNCTIONS
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=over 4
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=item C<is_unique @columns>
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Returns trueish if C<$self> is unique in its table regarding the
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columns C<@columns>. What it does is look for existing records in the
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database whose stored column values match C<$self>'s current values
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for these columns. If C<$self> already exists in the database then
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that row is not considered during the search.
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=back
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=head1 BUGS
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Nothing here yet.
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=head1 AUTHOR
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Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>
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=cut
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