initial version of ExplicitVersions VH

diff --git a/lib/DBIx/Class/DeploymentHandler/ExplicitVersions.pm b/lib/DBIx/Class/DeploymentHandler/ExplicitVersions.pm
index da87886..6c83d3b 100644 (file)
--- a/lib/DBIx/Class/DeploymentHandler/ExplicitVersions.pm
+++ b/lib/DBIx/Class/DeploymentHandler/ExplicitVersions.pm
@@ -1,8 +1,83 @@
 package DBIx::Class::DeploymentHandler::ExplicitVersions;
 use Moose;
 use Method::Signatures::Simple;
+use Carp 'croak';
 
-method ordered_schema_versions { undef }
+has schema => (
+  isa      => 'DBIx::Class::Schema',
+  is       => 'ro',
+  required => 1,
+  handles => [qw( ddl_filename schema_version )],
+);
+
+has version_rs => (
+  isa        => 'DBIx::Class::ResultSet',
+  is         => 'ro',
+  lazy_build => 1,
+  handles    => [qw( is_installed db_version )],
+);
+
+method _build_version_rs {
+   $self->schema->set_us_up_the_bomb;
+   $self->schema->resultset('__VERSION')
+}
+
+has to_version => (
+  is       => 'ro',
+  required => 1,
+);
+
+has ordered_versions => (
+  is       => 'ro',
+  isa      => 'ArrayRef',
+  required => 1,
+  trigger  => sub {
+    my $to_version = $_[0]->to_version;
+    my $db_version = $_[0]->db_version;
+
+    croak 'to_version not in ordered_versions'
+      unless grep { $to_version eq $_ } @{ $_[1] };
+
+    for (@{ $_[1] }) {
+      return if $_ eq $db_version;
+      croak 'to_version is before database version in ordered_versions'
+        if $_ eq $to_version;
+    }
+  },
+);
+
+has _version_idx => (
+  is         => 'rw',
+  isa        => 'Int',
+  lazy_build => 1,
+);
+
+method _inc_version_idx { $self->_version_idx($self->_version_idx + 1 ) }
+
+method _build__version_idx {
+  my $start = $self->version_rs->db_version;
+  my $idx = 0;
+  for (@{$self->ordered_versions}) {
+    return $idx
+      if $_ eq $self->db_version;
+    $idx++;
+  }
+  croak 'database version not found in ordered_versions!';
+}
+
+method next_version_set {
+  return undef
+    if $self->ordered_versions->[$self->_version_idx] eq $self->to_version;
+  my $next_idx = $self->_inc_version_idx;
+  if ( $next_idx <= $#{ $self->ordered_versions }) {
+    return [
+      $self->ordered_versions->[$next_idx - 1],
+      $self->ordered_versions->[$next_idx    ],
+    ]
+  } else {
+    return undef
+  }
+}
 
 __PACKAGE__->meta->make_immutable;
 

diff --git a/t/03_explict_versions.t b/t/03_explict_versions.t
new file mode 100644 (file)
index 0000000..1c5c05a
--- /dev/null
+++ b/t/03_explict_versions.t
@@ -0,0 +1,77 @@
+#!perl
+
+use Test::More;
+use Test::Exception;
+
+use lib 't/lib';
+use DBICTest;
+use DBIx::Class::DeploymentHandler;
+use DBIx::Class::DeploymentHandler::ExplicitVersions;
+my $db = 'dbi:SQLite:db.db';
+my @connection = ($db, '', '', { ignore_version => 1 });
+my $sql_dir = 't/sql';
+
+unlink 'db.db' if -e 'db.db';
+if (-d 't/sql') {
+  unlink $_ for glob('t/sql/*');
+} else {
+  mkdir 't/sql';
+}
+
+use DBICVersion_v1;
+my $s = DBICVersion::Schema->connect(@connection);
+
+my $handler = DBIx::Class::DeploymentHandler->new({
+   upgrade_directory => $sql_dir,
+   schema => $s,
+   databases => 'SQLite',
+ sqltargs => { add_drop_table => 0 },
+});
+
+my $version = $s->schema_version();
+$handler->create_install_ddl();
+
+$handler->install;
+
+my $versions = [map "$_.0", 0..100];
+
+{
+  my $vh = DBIx::Class::DeploymentHandler::ExplicitVersions->new({
+    schema => $s,
+    ordered_versions => $versions,
+    to_version => '1.0',
+  });
+
+  ok $vh, 'VersionHandler gets instantiated';
+
+  ok( !$vh->next_version_set, 'next version set returns undef if we are at the version requested' );
+}
+
+{
+  my $vh = DBIx::Class::DeploymentHandler::ExplicitVersions->new({
+    schema => $s,
+    ordered_versions => $versions,
+    to_version => '5.0',
+  });
+
+  ok $vh, 'VersionHandler gets instantiated';
+  ok( eq_array($vh->next_version_set, [qw( 1.0 2.0 )]), 'first version pair works' );
+  ok( eq_array($vh->next_version_set, [qw( 2.0 3.0 )]), 'second version pair works' );
+  ok( eq_array($vh->next_version_set, [qw( 3.0 4.0 )]), 'third version pair works' );
+  ok( eq_array($vh->next_version_set, [qw( 4.0 5.0 )]), 'fourth version pair works' );
+  ok( !$vh->next_version_set, 'no more versions after final pair' );
+  ok( !$vh->next_version_set, 'still no more versions after final pair' );
+}
+
+dies_ok {
+  my $vh = DBIx::Class::DeploymentHandler::ExplicitVersions->new({
+    schema => $s,
+    ordered_versions => $versions,
+    to_version => '0.0',
+  });
+} 'cannot request a version before the current version';
+
+done_testing;
+__END__
+
+vim: ts=2 sw=2 expandtab