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');
54 my $class = ref($self)||$self;
58 $version = ${"${class}::VERSION"};
65 $self->next::method(@_);
73 $self->{vschema} = DBIx::Class::Version->connect(@{$self->storage->connect_info()});
74 my $vtable = $self->{vschema}->resultset('Table');
77 if(!$self->_source_exists($vtable))
79 # $self->{vschema}->storage->debug(1);
80 $self->{vschema}->storage->ensure_connected();
81 $self->{vschema}->deploy();
86 $pversion = $self->get_db_version();
88 # warn("Previous version: $pversion\n");
89 if($pversion eq $self->schema_version)
91 warn "This version is already installed\n";
99 $vtable->create({ Version => $self->schema_version,
100 Installed => strftime("%Y-%m-%d %H:%M:%S", gmtime())
102 ## If we let the user do this, where does the Version table get updated?
103 warn "No previous version found, calling deploy to install this version.\n";
108 my $file = $self->ddl_filename(
109 $self->storage->sqlt_type,
110 $self->upgrade_directory,
111 $self->schema_version
115 # No upgrade path between these two versions
119 $file = $self->ddl_filename(
120 $self->storage->sqlt_type,
121 $self->upgrade_directory,
122 $self->schema_version,
125 # $file =~ s/@{[ $self->schema_version ]}/"${pversion}-" . $self->schema_version/e;
128 warn "Upgrade not possible, no upgrade file found ($file)\n";
133 open $fh, "<$file" or warn("Can't open upgrade file, $file ($!)");
134 my @data = split(/;\n/, join('', <$fh>));
136 @data = grep { $_ && $_ !~ /^-- / } @data;
137 @data = grep { $_ !~ /^(BEGIN TRANACTION|COMMIT)/m } @data;
139 $self->_filedata(\@data);
141 ## Don't do this yet, do only on command?
142 ## If we do this later, where does the Version table get updated??
143 warn "Versions out of sync. This is " . $self->schema_version .
144 ", your database contains version $pversion, please call upgrade on your Schema.\n";
145 # $self->upgrade($pversion, $self->schema_version);
150 my ($self, $rs) = @_;
152 my $vtable = $self->{vschema}->resultset('Table');
153 my $psearch = $vtable->search(undef,
155 { 'max' => 'Installed' },
157 as => ['maxinstall'],
159 $pversion = $vtable->search({ Installed => $psearch->get_column('maxinstall'),
161 $pversion = $pversion->Version if($pversion);
167 my ($self, $rs) = @_;
170 $rs->search({ 1, 0 })->count;
172 return 0 if $@ || !defined $c;
180 ## Make each ::DBI::Foo do this
181 $self->storage->backup($self->backup_directory());
191 my $vtable = $self->{vschema}->resultset('Table');
192 $vtable->create({ Version => $self->schema_version,
193 Installed => strftime("%Y-%m-%d %H:%M:%S", gmtime())
201 ## overridable sub, per default just run all the commands.
202 $self->run_upgrade(qr/create/i);
203 $self->run_upgrade(qr/alter table .*? add/i);
204 $self->run_upgrade(qr/alter table .*? (?!drop)/i);
205 $self->run_upgrade(qr/alter table .*? drop/i);
206 $self->run_upgrade(qr/drop/i);
211 my ($self, $stm) = @_;
212 # print "Reg: $stm\n";
213 my @statements = grep { $_ =~ $stm } @{$self->_filedata};
214 # print "Statements: ", join("\n", @statements), "\n";
215 $self->_filedata([ grep { $_ !~ /$stm/i } @{$self->_filedata} ]);
219 $self->storage->debugobj->query_start($_) if $self->storage->debug;
220 $self->storage->dbh->do($_) or warn "SQL was:\n $_";
221 $self->storage->debugobj->query_end($_) if $self->storage->debug;
231 DBIx::Class::Schema::Versioned - DBIx::Class::Schema plugin for Schema upgrades
235 package Library::Schema;
236 use base qw/DBIx::Class::Schema/;
237 # load Library::Schema::CD, Library::Schema::Book, Library::Schema::DVD
238 __PACKAGE__->load_classes(qw/CD Book DVD/);
240 __PACKAGE__->load_components(qw/+DBIx::Class::Schema::Versioned/);
241 __PACKAGE__->upgrade_directory('/path/to/upgrades/');
242 __PACKAGE__->backup_directory('/path/to/backups/');
247 # my special backup process
254 ## overridable sub, per default just runs 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);
261 $self->run_upgrade(qr//i);
266 This module is a component designed to extend L<DBIx::Class::Schema>
267 classes, to enable them to upgrade to newer schema layouts. To use this
268 module, you need to have called C<create_ddl_dir> on your Schema to
269 create your upgrade files to include with your delivery.
271 A table called I<SchemaVersions> is created and maintained by the
272 module. This contains two fields, 'Version' and 'Installed', which
273 contain each VERSION of your Schema, and the date+time it was installed.
275 If you would like to influence which levels of version change need
276 upgrades in your Schema, you can override the method C<ddl_filename>
277 in L<DBIx::Class::Schema>. Return a false value if there is no upgrade
278 path between the two versions supplied. By default, every change in
279 your VERSION is regarded as needing an upgrade.
281 The actual upgrade is called manually by calling C<upgrade> on your
282 schema object. Code is run at connect time to determine whether an
283 upgrade is needed, if so, a warning "Versions out of sync" is
286 NB: At the moment, SQLite upgrading is rather spotty, as SQL::Translator::Diff
287 returns SQL statements that SQLite does not support.
294 This is an overwritable method which is called just before the upgrade, to
295 allow you to make a backup of the database. Per default this method attempts
296 to call C<< $self->storage->backup >>, to run the standard backup on each
299 This method should return the name of the backup file, if appropriate..
303 This is the main upgrade method which calls the overridable do_upgrade and
304 also handles the backups and updating of the SchemaVersion table.
308 This is an overwritable method used to run your upgrade. The freeform method
309 allows you to run your upgrade any way you please, you can call C<run_upgrade>
310 any number of times to run the actual SQL commands, and in between you can
311 sandwich your data upgrading. For example, first run all the B<CREATE>
312 commands, then migrate your data from old to new tables/formats, then
313 issue the DROP commands when you are finished.
317 $self->run_upgrade(qr/create/i);
319 Runs a set of SQL statements matching a passed in regular expression. The
320 idea is that this method can be called any number of times from your
321 C<upgrade> method, running whichever commands you specify via the
322 regex in the parameter.
324 =head2 upgrade_directory
326 Use this to set the directory your upgrade files are stored in.
328 =head2 backup_directory
330 Use this to set the directory you want your backups stored in.
332 =head2 schema_version
334 Returns the current schema class' $VERSION; does -not- use $schema->VERSION
335 since that varies in results depending on if version.pm is installed, and if
336 so the perl or XS versions. If you want this to change, bug the version.pm
337 author to make vpp and vxs behave the same.
341 Jess Robinson <castaway@desert-island.demon.co.uk>