schema version using a diff from your I<upgrade_directory>. If a suitable diff is
not found then no upgrade is possible.
-NB: At the moment, only SQLite and MySQL are supported. This is due to
-spotty behaviour in the SQL::Translator producers, please help us by
-enhancing them. Ask on the mailing list or IRC channel for details (community details
-in L<DBIx::Class>).
+=head1 SEE ALSO
+
+L<DBIx::Class::DeploymentHandler> is a much more powerful alternative to this
+module. Examples of things it can do that this module cannot do include
+
+=over
+
+=item *
+
+Downgrades in addition to upgrades
+
+=item *
+
+Multiple sql files files per upgrade/downgrade/install
+
+=item *
+
+Perl scripts allowed for upgrade/downgrade/install
+
+=item *
+
+Just one set of files needed for upgrade, unlike this module where one might
+need to generate C<factorial(scalar @versions)>
+
+=back
=head1 GETTING STARTED
# must be called on a fresh database
if ($self->get_db_version()) {
- carp 'Install not possible as versions table already exists in database';
+ $self->throw_exception("A versioned schema has already been deployed, try upgrade instead.\n");
}
# default to current version if none passed
return if ($conn_attrs->{ignore_version} || ($ENV{DBIC_NO_VERSION_CHECK} && !exists $conn_attrs->{ignore_version}));
# check for legacy versions table and move to new if exists
- my $vschema_compat = DBIx::Class::VersionCompat->connect(@$conn_info);
unless ($self->_source_exists($vtable)) {
- my $vtable_compat = $vschema_compat->resultset('TableCompat');
+ my $vtable_compat = DBIx::Class::VersionCompat->connect(@$conn_info)->resultset('TableCompat');
if ($self->_source_exists($vtable_compat)) {
$self->{vschema}->deploy;
map { $vtable->create({ installed => $_->Installed, version => $_->Version }) } $vtable_compat->all;
{
my ($self, $rs) = @_;
- my $c = try { $rs->search({ 1, 0 })->count };
-
- return (defined $c) ? 1 : 0;
+ return try {
+ $rs->search(\'1=0')->cursor->next;
+ 1;
+ } catch {
+ 0;
+ };
}
1;