1 package DBIx::Class::Version::Table;
2 use base 'DBIx::Class';
6 __PACKAGE__->load_components(qw/ Core/);
7 __PACKAGE__->table('SchemaVersions');
9 __PACKAGE__->add_columns
11 'data_type' => 'VARCHAR',
12 'is_auto_increment' => 0,
13 'default_value' => undef,
14 'is_foreign_key' => 0,
20 'data_type' => 'VARCHAR',
21 'is_auto_increment' => 0,
22 'default_value' => undef,
23 'is_foreign_key' => 0,
24 'name' => 'Installed',
29 __PACKAGE__->set_primary_key('Version');
31 package DBIx::Class::Version;
32 use base 'DBIx::Class::Schema';
36 __PACKAGE__->register_class('Table', 'DBIx::Class::Version::Table');
39 # ---------------------------------------------------------------------------
40 package DBIx::Class::Schema::Versioned;
44 use base 'DBIx::Class';
48 __PACKAGE__->mk_classdata('_filedata');
49 __PACKAGE__->mk_classdata('upgrade_directory');
50 __PACKAGE__->mk_classdata('backup_directory');
51 __PACKAGE__->mk_classdata('do_backup');
55 my $class = ref($self)||$self;
59 $version = ${"${class}::VERSION"};
66 $self->next::method(@_);
74 $self->{vschema} = DBIx::Class::Version->connect(@{$self->storage->connect_info()});
76 my $pversion = $self->get_db_version();
78 if($pversion eq $self->schema_version)
80 warn "This version is already installed\n";
86 warn "Your DB is currently unversioned. Please call upgrade on your schema to sync the DB.\n";
90 my $file = $self->ddl_filename(
91 $self->storage->sqlt_type,
92 $self->upgrade_directory,
97 # No upgrade path between these two versions
102 ## Don't do this yet, do only on command?
103 ## If we do this later, where does the Version table get updated??
104 warn "Versions out of sync. This is " . $self->schema_version .
105 ", your database contains version $pversion, please call upgrade on your Schema.\n";
110 my ($self, $rs) = @_;
112 my $vtable = $self->{vschema}->resultset('Table');
113 return 0 unless ($self->_source_exists($vtable));
115 my $psearch = $vtable->search(undef,
117 { 'max' => 'Installed' },
119 as => ['maxinstall'],
121 my $pversion = $vtable->search({ Installed => $psearch->get_column('maxinstall'),
123 $pversion = $pversion->Version if($pversion);
129 my ($self, $rs) = @_;
132 $rs->search({ 1, 0 })->count;
134 return 0 if $@ || !defined $c;
142 ## Make each ::DBI::Foo do this
143 $self->storage->backup($self->backup_directory());
149 my $db_version = $self->get_db_version();
151 my %driver_to_db_map = (
155 my $db = $driver_to_db_map{$self->storage->dbh->{Driver}->{Name}};
157 print "Sorry, this is an unsupported DB\n";
161 require SQL::Translator;
162 require SQL::Translator::Diff;
163 my $db_tr = SQL::Translator->new({
166 parser_args => { dbh => $self->storage->dbh }
169 $db_tr->producer($db);
170 my $dbic_tr = SQL::Translator->new;
171 $dbic_tr->parser('SQL::Translator::Parser::DBIx::Class');
172 $dbic_tr = $self->storage->configure_sqlt($dbic_tr, $db);
173 $dbic_tr->data($self);
174 $dbic_tr->producer($db);
176 $db_tr->schema->name('db_schema');
177 $dbic_tr->schema->name('dbic_schema');
179 # is this really necessary?
180 foreach my $tr ($db_tr, $dbic_tr) {
181 my $data = $tr->data;
182 $tr->parser->($tr, $$data);
185 my $diff = SQL::Translator::Diff::schema_diff($db_tr->schema, $db,
186 $dbic_tr->schema, $db,
189 my $filename = $self->ddl_filename(
191 $self->upgrade_directory,
192 $self->schema_version,
196 if(!open($file, ">$filename"))
198 $self->throw_exception("Can't open $filename for writing ($!)");
204 # create versions table
205 $self->{vschema}->deploy;
207 print "WARNING: There may be differences between your DB and your DBIC schema. Please review and if necessary run the SQL in $filename to sync your DB.\n";
209 if ($db_version eq $self->schema_version) {
210 print "Upgrade not necessary\n";
214 my $file = $self->ddl_filename(
215 $self->storage->sqlt_type,
216 $self->upgrade_directory,
217 $self->schema_version,
223 warn "Upgrade not possible, no upgrade file found ($file)\n";
228 open $fh, "<$file" or warn("Can't open upgrade file, $file ($!)");
229 my @data = split(/\n/, join('', <$fh>));
230 @data = grep(!/^--/, @data);
231 @data = split(/;/, join('', @data));
233 @data = grep { $_ && $_ !~ /^-- / } @data;
234 @data = grep { $_ !~ /^(BEGIN TRANACTION|COMMIT)/m } @data;
236 $self->_filedata(\@data);
237 $self->backup() if($self->do_backup);
244 my $vtable = $self->{vschema}->resultset('Table');
245 $vtable->create({ Version => $self->schema_version,
246 Installed => strftime("%Y-%m-%d %H:%M:%S", gmtime())
255 ## overridable sub, per default just run all the commands.
256 $self->run_upgrade(qr/create/i);
257 $self->run_upgrade(qr/alter table .*? add/i);
258 $self->run_upgrade(qr/alter table .*? (?!drop)/i);
259 $self->run_upgrade(qr/alter table .*? drop/i);
260 $self->run_upgrade(qr/drop/i);
265 my ($self, $stm) = @_;
266 # print "Reg: $stm\n";
267 my @statements = grep { $_ =~ $stm } @{$self->_filedata};
268 # print "Statements: ", join("\n", @statements), "\n";
269 $self->_filedata([ grep { $_ !~ /$stm/i } @{$self->_filedata} ]);
273 $self->storage->debugobj->query_start($_) if $self->storage->debug;
274 $self->storage->dbh->do($_) or warn "SQL was:\n $_";
275 $self->storage->debugobj->query_end($_) if $self->storage->debug;
285 DBIx::Class::Schema::Versioned - DBIx::Class::Schema plugin for Schema upgrades
289 package Library::Schema;
290 use base qw/DBIx::Class::Schema/;
291 # load Library::Schema::CD, Library::Schema::Book, Library::Schema::DVD
292 __PACKAGE__->load_classes(qw/CD Book DVD/);
294 __PACKAGE__->load_components(qw/+DBIx::Class::Schema::Versioned/);
295 __PACKAGE__->upgrade_directory('/path/to/upgrades/');
296 __PACKAGE__->backup_directory('/path/to/backups/');
301 # my special backup process
308 ## overridable sub, per default just runs all the commands.
310 $self->run_upgrade(qr/create/i);
311 $self->run_upgrade(qr/alter table .*? add/i);
312 $self->run_upgrade(qr/alter table .*? (?!drop)/i);
313 $self->run_upgrade(qr/alter table .*? drop/i);
314 $self->run_upgrade(qr/drop/i);
315 $self->run_upgrade(qr//i);
320 This module is a component designed to extend L<DBIx::Class::Schema>
321 classes, to enable them to upgrade to newer schema layouts. To use this
322 module, you need to have called C<create_ddl_dir> on your Schema to
323 create your upgrade files to include with your delivery.
325 A table called I<SchemaVersions> is created and maintained by the
326 module. This contains two fields, 'Version' and 'Installed', which
327 contain each VERSION of your Schema, and the date+time it was installed.
329 If you would like to influence which levels of version change need
330 upgrades in your Schema, you can override the method C<ddl_filename>
331 in L<DBIx::Class::Schema>. Return a false value if there is no upgrade
332 path between the two versions supplied. By default, every change in
333 your VERSION is regarded as needing an upgrade.
335 The actual upgrade is called manually by calling C<upgrade> on your
336 schema object. Code is run at connect time to determine whether an
337 upgrade is needed, if so, a warning "Versions out of sync" is
340 NB: At the moment, SQLite upgrading is rather spotty, as SQL::Translator::Diff
341 returns SQL statements that SQLite does not support.
348 This is an overwritable method which is called just before the upgrade, to
349 allow you to make a backup of the database. Per default this method attempts
350 to call C<< $self->storage->backup >>, to run the standard backup on each
353 This method should return the name of the backup file, if appropriate..
357 This is the main upgrade method which calls the overridable do_upgrade and
358 also handles the backups and updating of the SchemaVersion table.
362 This is an overwritable method used to run your upgrade. The freeform method
363 allows you to run your upgrade any way you please, you can call C<run_upgrade>
364 any number of times to run the actual SQL commands, and in between you can
365 sandwich your data upgrading. For example, first run all the B<CREATE>
366 commands, then migrate your data from old to new tables/formats, then
367 issue the DROP commands when you are finished.
371 $self->run_upgrade(qr/create/i);
373 Runs a set of SQL statements matching a passed in regular expression. The
374 idea is that this method can be called any number of times from your
375 C<upgrade> method, running whichever commands you specify via the
376 regex in the parameter.
378 =head2 upgrade_directory
380 Use this to set the directory your upgrade files are stored in.
382 =head2 backup_directory
384 Use this to set the directory you want your backups stored in.
386 =head2 schema_version
388 Returns the current schema class' $VERSION; does -not- use $schema->VERSION
389 since that varies in results depending on if version.pm is installed, and if
390 so the perl or XS versions. If you want this to change, bug the version.pm
391 author to make vpp and vxs behave the same.
395 Jess Robinson <castaway@desert-island.demon.co.uk>