use base 'DBIx::Class::Schema';
use Carp::Clan qw/^DBIx::Class/;
-use POSIX 'strftime';
+use Time::HiRes qw/gettimeofday/;
__PACKAGE__->mk_classdata('_filedata');
__PACKAGE__->mk_classdata('upgrade_directory');
## override this method
}
+=head2 ordered_schema_versions
+
+=over 4
+
+=item Returns: a list of version numbers, ordered from lowest to highest
+
+=back
+
+Virtual method that should be overriden to return an ordered list
+of schema versions. This is then used to produce a set of steps to
+upgrade through to achieve the required schema version.
+
+You may want the db_version retrieved via $self->get_db_version
+and the schema_version which is retrieved via $self->schema_version
+
+=cut
+
+sub ordered_schema_versions {
+ ## override this method
+}
+
=head2 upgrade
-Call this to attempt to upgrade your database from the version it is at to the version
-this DBIC schema is at. If they are the same it does nothing.
+Call this to attempt to upgrade your database from the version it
+is at to the version this DBIC schema is at. If they are the same
+it does nothing.
-It requires an SQL diff file to exist in you I<upgrade_directory>, normally you will
-have created this using L<DBIx::Class::Schema/create_ddl_dir>.
+It will call L</ordered_schema_versions> to retrieve an ordered
+list of schema versions (if ordered_schema_versions returns nothing
+then it is assumed you can do the upgrade as a single step). It
+then iterates through the list of versions between the current db
+version and the schema version applying one update at a time until
+all relvant updates are applied.
-If successful the dbix_class_schema_versions table is updated with the current
-DBIC schema version.
+The individual update steps are performed by using
+L</upgrade_single_step>, which will apply the update and also
+update the dbix_class_schema_versions table.
=cut
-sub upgrade
-{
- my ($self) = @_;
- my $db_version = $self->get_db_version();
+sub upgrade {
+ my ($self) = @_;
+ my $db_version = $self->get_db_version();
- # db unversioned
- unless ($db_version) {
- carp 'Upgrade not possible as database is unversioned. Please call install first.';
- return;
- }
+ # db unversioned
+ unless ($db_version) {
+ carp 'Upgrade not possible as database is unversioned. Please call install first.';
+ return;
+ }
+
+ # db and schema at same version. do nothing
+ if ( $db_version eq $self->schema_version ) {
+ carp "Upgrade not necessary\n";
+ return;
+ }
+
+ my @version_list = $self->ordered_schema_versions;
+
+ # if nothing returned then we preload with min/max
+ @version_list = ( $db_version, $self->schema_version )
+ unless ( scalar(@version_list) );
+
+ # catch the case of someone returning an arrayref
+ @version_list = @{ $version_list[0] }
+ if ( ref( $version_list[0] ) eq 'ARRAY' );
+
+ # remove all versions in list above the required version
+ while ( scalar(@version_list)
+ && ( $version_list[-1] ne $self->schema_version ) )
+ {
+ pop @version_list;
+ }
+
+ # remove all versions in list below the current version
+ while ( scalar(@version_list) && ( $version_list[0] ne $db_version ) ) {
+ shift @version_list;
+ }
+
+ # check we have an appropriate list of versions
+ if ( scalar(@version_list) < 2 ) {
+ die;
+ }
+
+ # do sets of upgrade
+ while ( scalar(@version_list) >= 2 ) {
+ $self->upgrade_single_step( $version_list[0], $version_list[1] );
+ shift @version_list;
+ }
+}
+
+=head2 upgrade_single_step
+
+=over 4
+
+=item Arguments: db_version - the version currently within the db
+
+=item Arguments: target_version - the version to upgrade to
+
+=back
+
+Call this to attempt to upgrade your database from the
+I<db_version> to the I<target_version>. If they are the same it
+does nothing.
+
+It requires an SQL diff file to exist in your I<upgrade_directory>,
+normally you will have created this using L<DBIx::Class::Schema/create_ddl_dir>.
+
+If successful the dbix_class_schema_versions table is updated with
+the I<target_version>.
+
+This method may be called repeatedly by the upgrade method to
+upgrade through a series of updates.
+
+=cut
+
+sub upgrade_single_step
+{
+ my ($self,
+ $db_version,
+ $target_version) = @_;
# db and schema at same version. do nothing
- if ($db_version eq $self->schema_version) {
+ if ($db_version eq $target_version) {
carp "Upgrade not necessary\n";
return;
}
my $upgrade_file = $self->ddl_filename(
$self->storage->sqlt_type,
- $self->schema_version,
+ $target_version,
$self->upgrade_directory,
$db_version,
);
$self->txn_do(sub { $self->do_upgrade() });
# set row in dbix_class_schema_versions table
- $self->_set_db_version;
+ $self->_set_db_version({version => $target_version});
}
=head2 do_upgrade
my $version = $params->{version} ? $params->{version} : $self->schema_version;
my $vtable = $self->{vschema}->resultset('Table');
- $vtable->create({ version => $version,
- installed => strftime("%Y-%m-%d %H:%M:%S", gmtime())
- });
+ ##############################################################################
+ # !!! NOTE !!!
+ ##############################################################################
+ #
+ # The travesty below replaces the old nice timestamp format of %Y-%m-%d %H:%M:%S
+ # This is necessary since there are legitimate cases when upgrades can happen
+ # back to back within the same second. This breaks things since we relay on the
+ # ability to sort by the 'installed' value. The logical choice of an autoinc
+ # is not possible, as it will break multiple legacy installations. Also it is
+ # not possible to format the string sanely, as the column is a varchar(20).
+ # The 'v' character is added to the front of the string, so that any version
+ # formatted by this new function will sort _after_ any existing 200... strings.
+ my @tm = gettimeofday();
+ my @dt = gmtime ($tm[0]);
+ my $o = $vtable->create({
+ version => $version,
+ installed => sprintf("v%04d%02d%02d_%02d%02d%02d.%03.0f",
+ $dt[5] + 1900,
+ $dt[4] + 1,
+ $dt[3],
+ $dt[2],
+ $dt[1],
+ $dt[0],
+ $tm[1] / 1000, # convert to millisecs, format as up/down rounded int above
+ ),
+ });
}
sub _read_sql_file {
my $fn = {
v1 => File::Spec->catfile($ddl_dir, 'DBICVersion-Schema-1.0-MySQL.sql'),
v2 => File::Spec->catfile($ddl_dir, 'DBICVersion-Schema-2.0-MySQL.sql'),
- trans => File::Spec->catfile($ddl_dir, 'DBICVersion-Schema-1.0-2.0-MySQL.sql'),
+ v3 => File::Spec->catfile($ddl_dir, 'DBICVersion-Schema-3.0-MySQL.sql'),
+ trans_v12 => File::Spec->catfile($ddl_dir, 'DBICVersion-Schema-1.0-2.0-MySQL.sql'),
+ trans_v23 => File::Spec->catfile($ddl_dir, 'DBICVersion-Schema-2.0-3.0-MySQL.sql'),
};
use lib qw(t/lib);
use DBICTest; # do not remove even though it is not used
-use_ok('DBICVersionOrig');
+use_ok('DBICVersion_v1');
-my $schema_orig = DBICVersion::Schema->connect($dsn, $user, $pass, { ignore_version => 1 });
-eval { $schema_orig->storage->dbh->do('drop table ' . $version_table_name) };
-eval { $schema_orig->storage->dbh->do('drop table ' . $old_table_name) };
+my $schema_v1 = DBICVersion::Schema->connect($dsn, $user, $pass, { ignore_version => 1 });
+eval { $schema_v1->storage->dbh->do('drop table ' . $version_table_name) };
+eval { $schema_v1->storage->dbh->do('drop table ' . $old_table_name) };
-is($schema_orig->ddl_filename('MySQL', '1.0', $ddl_dir), $fn->{v1}, 'Filename creation working');
+is($schema_v1->ddl_filename('MySQL', '1.0', $ddl_dir), $fn->{v1}, 'Filename creation working');
unlink( $fn->{v1} ) if ( -e $fn->{v1} );
-$schema_orig->create_ddl_dir('MySQL', undef, $ddl_dir);
+$schema_v1->create_ddl_dir('MySQL', undef, $ddl_dir);
ok(-f $fn->{v1}, 'Created DDL file');
-$schema_orig->deploy({ add_drop_table => 1 });
+$schema_v1->deploy({ add_drop_table => 1 });
-my $tvrs = $schema_orig->{vschema}->resultset('Table');
-is($schema_orig->_source_exists($tvrs), 1, 'Created schema from DDL file');
+my $tvrs = $schema_v1->{vschema}->resultset('Table');
+is($schema_v1->_source_exists($tvrs), 1, 'Created schema from DDL file');
# loading a new module defining a new version of the same table
DBICVersion::Schema->_unregister_source ('Table');
-eval "use DBICVersionNew";
+eval "use DBICVersion_v2";
-my $schema_upgrade = DBICVersion::Schema->connect($dsn, $user, $pass, { ignore_version => 1 });
+my $schema_v2 = DBICVersion::Schema->connect($dsn, $user, $pass, { ignore_version => 1 });
{
unlink($fn->{v2});
- unlink($fn->{trans});
+ unlink($fn->{trans_v12});
- is($schema_upgrade->get_db_version(), '1.0', 'get_db_version ok');
- is($schema_upgrade->schema_version, '2.0', 'schema version ok');
- $schema_upgrade->create_ddl_dir('MySQL', '2.0', $ddl_dir, '1.0');
- ok(-f $fn->{trans}, 'Created DDL file');
+ is($schema_v2->get_db_version(), '1.0', 'get_db_version ok');
+ is($schema_v2->schema_version, '2.0', 'schema version ok');
+ $schema_v2->create_ddl_dir('MySQL', '2.0', $ddl_dir, '1.0');
+ ok(-f $fn->{trans_v12}, 'Created DDL file');
{
my $w;
local $SIG{__WARN__} = sub { $w = shift };
- sleep 1; # remove this when TODO below is completed
-
- $schema_upgrade->upgrade();
+ $schema_v2->upgrade();
like ($w, qr/Attempting upgrade\.$/, 'Warn before upgrade');
}
- is($schema_upgrade->get_db_version(), '2.0', 'db version number upgraded');
+ is($schema_v2->get_db_version(), '2.0', 'db version number upgraded');
eval {
- $schema_upgrade->storage->dbh->do('select NewVersionName from TestVersion');
+ $schema_v2->storage->dbh->do('select NewVersionName from TestVersion');
};
is($@, '', 'new column created');
warn @_;
}
};
- $schema_upgrade->create_ddl_dir('MySQL', '2.0', $ddl_dir, '1.0');
+ $schema_v2->create_ddl_dir('MySQL', '2.0', $ddl_dir, '1.0');
is (2, @w, 'A warning generated for both the DDL and the diff');
like ($w[0], qr/Overwriting existing DDL file - $fn->{v2}/, 'New version DDL overwrite warning');
- like ($w[1], qr/Overwriting existing diff file - $fn->{trans}/, 'Upgrade diff overwrite warning');
+ like ($w[1], qr/Overwriting existing diff file - $fn->{trans_v12}/, 'Upgrade diff overwrite warning');
}
{
}
+# repeat the v1->v2 process for v2->v3 before testing v1->v3
+DBICVersion::Schema->_unregister_source ('Table');
+eval "use DBICVersion_v3";
+
+my $schema_v3 = DBICVersion::Schema->connect($dsn, $user, $pass, { ignore_version => 1 });
+{
+ unlink($fn->{v3});
+ unlink($fn->{trans_v23});
+
+ is($schema_v3->get_db_version(), '2.0', 'get_db_version 2.0 ok');
+ is($schema_v3->schema_version, '3.0', 'schema version 3.0 ok');
+ $schema_v3->create_ddl_dir('MySQL', '3.0', $ddl_dir, '2.0');
+ ok(-f $fn->{trans_v23}, 'Created DDL 2.0 -> 3.0 file');
+
+ {
+ my $w;
+ local $SIG{__WARN__} = sub { $w = shift };
+
+ $schema_v3->upgrade();
+ like ($w, qr/Attempting upgrade\.$/, 'Warn before upgrade');
+ }
+
+ is($schema_v3->get_db_version(), '3.0', 'db version number upgraded');
+
+ eval {
+ $schema_v3->storage->dbh->do('select ExtraColumn from TestVersion');
+ };
+ is($@, '', 'new column created');
+}
+
+# now put the v1 schema back again
+{
+ # drop all the tables...
+ eval { $schema_v1->storage->dbh->do('drop table ' . $version_table_name) };
+ eval { $schema_v1->storage->dbh->do('drop table ' . $old_table_name) };
+ eval { $schema_v1->storage->dbh->do('drop table TestVersion') };
+
+ {
+ local $DBICVersion::Schema::VERSION = '1.0';
+ $schema_v1->deploy;
+ }
+ is($schema_v1->get_db_version(), '1.0', 'get_db_version 1.0 ok');
+}
+
+# attempt v1 -> v3 upgrade....
+{
+ {
+ my $w;
+ local $SIG{__WARN__} = sub { $w = shift };
+
+ $schema_v3->upgrade();
+ like ($w, qr/Attempting upgrade\.$/, 'Warn before upgrade');
+ }
+
+ is($schema_v3->get_db_version(), '3.0', 'db version number upgraded');
+}
+
# check behaviour of DBIC_NO_VERSION_CHECK env var and ignore_version connect attr
{
my $schema_version = DBICVersion::Schema->connect($dsn, $user, $pass);
local $TODO = 'To fix this properly the table must be extended with an autoinc column, mst will not accept anything less';
- eval { $schema_orig->storage->dbh->do('drop table ' . $version_table_name) };
- eval { $schema_orig->storage->dbh->do('drop table ' . $old_table_name) };
- eval { $schema_orig->storage->dbh->do('drop table TestVersion') };
+ eval { $schema_v2->storage->dbh->do('drop table ' . $version_table_name) };
+ eval { $schema_v2->storage->dbh->do('drop table ' . $old_table_name) };
+ eval { $schema_v2->storage->dbh->do('drop table TestVersion') };
# this attempts to sleep until the turn of the second
my $t = time();
diag ('Fast deploy/upgrade start: ', time() );
{
- local $DBICVersion::Schema::VERSION = '1.0';
- $schema_orig->deploy;
+ local $DBICVersion::Schema::VERSION = '2.0';
+ $schema_v2->deploy;
}
local $SIG{__WARN__} = sub { warn if $_[0] !~ /Attempting upgrade\.$/ };
- $schema_upgrade->upgrade();
+ $schema_v2->upgrade();
- is($schema_upgrade->get_db_version(), '2.0', 'Fast deploy/upgrade');
+ is($schema_v2->get_db_version(), '3.0', 'Fast deploy/upgrade');
};
unless ($ENV{DBICTEST_KEEP_VERSIONING_DDL}) {
projects / dbsrgits/DBIx-Class.git / commitdiff