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package DBIx::Class::DeploymentHandler::VersionHandler::ExplicitVersions;
$DBIx::Class::DeploymentHandler::VersionHandler::ExplicitVersions::VERSION = '0.002233';
use Moose;
# ABSTRACT: Define your own list of versions to use for migrations
use Carp 'croak';
with 'DBIx::Class::DeploymentHandler::HandlesVersioning';
has schema_version => (
is => 'ro',
required => 1,
);
has initial_version => (
isa => 'Str',
is => 'ro',
required => 1,
);
has to_version => (
is => 'ro',
isa => 'Str',
lazy_build => 1,
);
sub _build_to_version { $_[0]->schema_version }
has ordered_versions => (
is => 'ro',
isa => 'ArrayRef',
required => 1,
);
has _index_of_versions => (
is => 'ro',
isa => 'HashRef',
lazy_build => 1,
);
sub _build__index_of_versions {
my %ret;
my $i = 0;
for (@{ $_[0]->ordered_versions }) {
$ret{$_} = $i++;
}
\%ret;
}
has _version_idx => (
is => 'rw',
isa => 'Int',
lazy_build => 1,
);
sub _build__version_idx { $_[0]->_index_of_versions->{$_[0]->initial_version} }
sub _inc_version_idx { $_[0]->_version_idx($_[0]->_version_idx + 1 ) }
sub _dec_version_idx { $_[0]->_version_idx($_[0]->_version_idx - 1 ) }
# provide backwards compatibility for initial_version/database_version
around BUILDARGS => sub {
my $orig = shift;
my $class = shift;
my $args = $class->$orig(@_);
$args->{initial_version} = $args->{database_version}
if exists $args->{database_version} && !exists $args->{initial_version};
return $args;
};
sub next_version_set {
my $self = shift;
if (
$self->_index_of_versions->{$self->to_version} <
$self->_version_idx
) {
croak "you are trying to upgrade and your current version is greater\n".
"than the version you are trying to upgrade to. Either downgrade\n".
"or update your schema"
} elsif ( $self->_version_idx == $self->_index_of_versions->{$self->to_version}) {
return undef
} else {
my $next_idx = $self->_inc_version_idx;
return [
$self->ordered_versions->[$next_idx - 1],
$self->ordered_versions->[$next_idx ],
];
}
}
sub previous_version_set {
my $self = shift;
if (
$self->_index_of_versions->{$self->to_version} >
$self->_version_idx
) {
croak "you are trying to downgrade and your current version is less\n".
"than the version you are trying to downgrade to. Either upgrade\n".
"or update your schema"
} elsif ( $self->_version_idx == $self->_index_of_versions->{$self->to_version}) {
return undef
} else {
my $next_idx = $self->_dec_version_idx;
return [
$self->ordered_versions->[$next_idx + 1],
$self->ordered_versions->[$next_idx ],
];
}
}
__PACKAGE__->meta->make_immutable;
1;
# vim: ts=2 sw=2 expandtab
__END__
=pod
=head1 NAME
DBIx::Class::DeploymentHandler::VersionHandler::ExplicitVersions - Define your own list of versions to use for migrations
=head1 SEE ALSO
This class is an implementation of
L<DBIx::Class::DeploymentHandler::HandlesVersioning>. Pretty much all the
documentation is there.
=head1 AUTHOR
Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2019 by Arthur Axel "fREW" Schmidt.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
