# Some mistakes the fault of Matt S Trout
+# Others the fault of Ash Berlin
+
use strict;
use warnings;
use vars qw($DEBUG $VERSION @EXPORT_OK);
+$VERSION = '1.10';
$DEBUG = 0 unless defined $DEBUG;
-$VERSION = sprintf "%d.%02d", q$Revision 1.0$ =~ /(\d+)\.(\d+)/;
use Exporter;
-use Data::Dumper;
use SQL::Translator::Utils qw(debug normalize_name);
+use Carp::Clan qw/^SQL::Translator|^DBIx::Class/;
use base qw(Exporter);
# -------------------------------------------------------------------
# parse($tr, $data)
#
-# Note that $data, in the case of this parser, is unuseful.
+# setting parser_args => { add_fk_index => 0 } will prevent
+# the auto-generation of an index for each FK.
+#
+# Note that $data, in the case of this parser, is not useful.
# We're working with DBIx::Class Schemas, not data streams.
# -------------------------------------------------------------------
sub parse {
- my ($tr, $data) = @_;
- my $args = $tr->parser_args;
- my $dbixschema = $args->{'DBIx::Schema'} || $data;
- $dbixschema ||= $args->{'package'};
-
- die 'No DBIx::Schema' unless ($dbixschema);
- if (!ref $dbixschema) {
- eval "use $dbixschema;";
- die "Can't load $dbixschema ($@)" if($@);
+ my ($tr, $data) = @_;
+ my $args = $tr->parser_args;
+ my $dbicschema = $args->{'DBIx::Class::Schema'} || $args->{"DBIx::Schema"} ||$data;
+ $dbicschema ||= $args->{'package'};
+ my $limit_sources = $args->{'sources'};
+
+ croak 'No DBIx::Class::Schema' unless ($dbicschema);
+ if (!ref $dbicschema) {
+ eval "use $dbicschema;";
+ croak "Can't load $dbicschema ($@)" if($@);
}
my $schema = $tr->schema;
my $table_no = 0;
-# print Dumper($dbixschema->registered_classes);
+ $schema->name( ref($dbicschema) . " v" . ($dbicschema->schema_version || '1.x'))
+ unless ($schema->name);
+
+ my @monikers = sort $dbicschema->sources;
+ if ($limit_sources) {
+ my $ref = ref $limit_sources || '';
+ $dbicschema->throw_exception ("'sources' parameter must be an array or hash ref")
+ unless( $ref eq 'ARRAY' || ref eq 'HASH' );
+
+ # limit monikers to those specified in
+ my $sources;
+ if ($ref eq 'ARRAY') {
+ $sources->{$_} = 1 for (@$limit_sources);
+ } else {
+ $sources = $limit_sources;
+ }
+ @monikers = grep { $sources->{$_} } @monikers;
+ }
+
+
+ my(%table_monikers, %view_monikers);
+ for my $moniker (@monikers){
+ my $source = $dbicschema->source($moniker);
+ if ( $source->isa('DBIx::Class::ResultSource::Table') ) {
+ $table_monikers{$moniker}++;
+ } elsif( $source->isa('DBIx::Class::ResultSource::View') ){
+ next if $source->is_virtual;
+ $view_monikers{$moniker}++;
+ }
+ }
- #foreach my $tableclass ($dbixschema->registered_classes)
- foreach my $moniker ($dbixschema->sources)
+ my %tables;
+ foreach my $moniker (sort keys %table_monikers)
{
- #eval "use $tableclass";
- #print("Can't load $tableclass"), next if($@);
- my $source = $dbixschema->source($moniker);
+ my $source = $dbicschema->source($moniker);
+ my $table_name = $source->name;
+
+ # FIXME - this isn't the right way to do it, but sqlt does not
+ # support quoting properly to be signaled about this
+ $table_name = $$table_name if ref $table_name eq 'SCALAR';
+
+ # It's possible to have multiple DBIC sources using the same table
+ next if $tables{$table_name};
- my $table = $schema->add_table(
- name => $source->name,
+ $tables{$table_name}{source} = $source;
+ my $table = $tables{$table_name}{object} = SQL::Translator::Schema::Table->new(
+ name => $table_name,
type => 'TABLE',
- ) || die $schema->error;
- my $colcount = 0;
+ );
foreach my $col ($source->columns)
{
- # assuming column_info in dbix is the same as DBI (?)
+ # assuming column_info in dbic is the same as DBI (?)
# data_type is a number, column_type is text?
my %colinfo = (
name => $col,
if ($colinfo{is_nullable}) {
$colinfo{default} = '' unless exists $colinfo{default};
}
- my $f = $table->add_field(%colinfo) || die $table->error;
+ my $f = $table->add_field(%colinfo)
+ || $dbicschema->throw_exception ($table->error);
}
$table->primary_key($source->primary_columns);
+ my @primary = $source->primary_columns;
+ my %unique_constraints = $source->unique_constraints;
+ foreach my $uniq (sort keys %unique_constraints) {
+ if (!$source->_compare_relationship_keys($unique_constraints{$uniq}, \@primary)) {
+ $table->add_constraint(
+ type => 'unique',
+ name => $uniq,
+ fields => $unique_constraints{$uniq}
+ );
+ }
+ }
my @rels = $source->relationships();
- foreach my $rel (@rels)
+
+ my %created_FK_rels;
+
+ # global add_fk_index set in parser_args
+ my $add_fk_index = (exists $args->{add_fk_index} && ! $args->{add_fk_index}) ? 0 : 1;
+
+ foreach my $rel (sort @rels)
{
+
my $rel_info = $source->relationship_info($rel);
- print "Accessor: $rel_info->{attrs}{accessor}\n";
- next if(!exists $rel_info->{attrs}{accessor} ||
- $rel_info->{attrs}{accessor} eq 'multi');
- # Going by the accessor type isn't such a good idea (yes, I know
- # I suggested it). I think the best way to tell if something's a
- # foreign key constraint is to assume if it doesn't include our
- # primaries then it is (dumb but it'll do). Ignore any rel cond
- # that isn't a straight hash, but get both sets of keys in full
- # so you don't barf on multi-primaries. Oh, and a dog-simple
- # deploy method to chuck the results of this exercise at a db
- # for testing is
- # $schema->storage->dbh->do($_) for split(";\n", $sql);
- # -- mst (03:42 local time, please excuse any mistakes)
- my $rel_table = $rel_info->{class}->table();
- my $cond = (keys (%{$rel_info->{cond}}))[0];
- my ($refkey) = $cond =~ /^\w+\.(\w+)$/;
- if($rel_table && $refkey)
- {
- $table->add_constraint(
- type => 'foreign_key',
- name => "fk_${rel}_id",
- fields => $rel,
- reference_fields => $refkey,
- reference_table => $rel_table,
- );
+
+ # Ignore any rel cond that isn't a straight hash
+ next unless ref $rel_info->{cond} eq 'HASH';
+
+ my $relsource = $source->related_source($rel);
+
+ # related sources might be excluded via a {sources} filter or might be views
+ next unless exists $table_monikers{$relsource->source_name};
+
+ my $rel_table = $relsource->name;
+
+ # FIXME - this isn't the right way to do it, but sqlt does not
+ # support quoting properly to be signaled about this
+ $rel_table = $$rel_table if ref $rel_table eq 'SCALAR';
+
+ my $reverse_rels = $source->reverse_relationship_info($rel);
+ my ($otherrelname, $otherrelationship) = each %{$reverse_rels};
+
+ # Force the order of @cond to match the order of ->add_columns
+ my $idx;
+ my %other_columns_idx = map {'foreign.'.$_ => ++$idx } $relsource->columns;
+ my @cond = sort { $other_columns_idx{$a} cmp $other_columns_idx{$b} } keys(%{$rel_info->{cond}});
+
+ # Get the key information, mapping off the foreign/self markers
+ my @refkeys = map {/^\w+\.(\w+)$/} @cond;
+ my @keys = map {$rel_info->{cond}->{$_} =~ /^\w+\.(\w+)$/} @cond;
+
+ # determine if this relationship is a self.fk => foreign.pk (i.e. belongs_to)
+ my $fk_constraint;
+
+ #first it can be specified explicitly
+ if ( exists $rel_info->{attrs}{is_foreign_key_constraint} ) {
+ $fk_constraint = $rel_info->{attrs}{is_foreign_key_constraint};
+ }
+ # it can not be multi
+ elsif ( $rel_info->{attrs}{accessor}
+ && $rel_info->{attrs}{accessor} eq 'multi' ) {
+ $fk_constraint = 0;
+ }
+ # if indeed single, check if all self.columns are our primary keys.
+ # this is supposed to indicate a has_one/might_have...
+ # where's the introspection!!?? :)
+ else {
+ $fk_constraint = not $source->_compare_relationship_keys(\@keys, \@primary);
+ }
+
+ my $cascade;
+ for my $c (qw/delete update/) {
+ if (exists $rel_info->{attrs}{"on_$c"}) {
+ if ($fk_constraint) {
+ $cascade->{$c} = $rel_info->{attrs}{"on_$c"};
+ }
+ elsif ( $rel_info->{attrs}{"on_$c"} ) {
+ carp "SQLT attribute 'on_$c' was supplied for relationship '$moniker/$rel', which does not appear to be a foreign constraint. "
+ . "If you are sure that SQLT must generate a constraint for this relationship, add 'is_foreign_key_constraint => 1' to the attributes.\n";
+ }
+ }
+ elsif (defined $otherrelationship and $otherrelationship->{attrs}{$c eq 'update' ? 'cascade_copy' : 'cascade_delete'}) {
+ $cascade->{$c} = 'CASCADE';
+ }
+ }
+
+ if($rel_table)
+ {
+ # Constraints are added only if applicable
+ next unless $fk_constraint;
+
+ # Make sure we dont create the same foreign key constraint twice
+ my $key_test = join("\x00", sort @keys);
+ next if $created_FK_rels{$rel_table}->{$key_test};
+
+ if (scalar(@keys)) {
+
+ $created_FK_rels{$rel_table}->{$key_test} = 1;
+
+ my $is_deferrable = $rel_info->{attrs}{is_deferrable};
+
+ # calculate dependencies: do not consider deferrable constraints and
+ # self-references for dependency calculations
+ if (! $is_deferrable and $rel_table ne $table_name) {
+ $tables{$table_name}{foreign_table_deps}{$rel_table}++;
+ }
+
+ $table->add_constraint(
+ type => 'foreign_key',
+ name => join('_', $table_name, 'fk', @keys),
+ fields => \@keys,
+ reference_fields => \@refkeys,
+ reference_table => $rel_table,
+ on_delete => uc ($cascade->{delete} || ''),
+ on_update => uc ($cascade->{update} || ''),
+ (defined $is_deferrable ? ( deferrable => $is_deferrable ) : ()),
+ );
+
+ # global parser_args add_fk_index param can be overridden on the rel def
+ my $add_fk_index_rel = (exists $rel_info->{attrs}{add_fk_index}) ? $rel_info->{attrs}{add_fk_index} : $add_fk_index;
+
+ if ($add_fk_index_rel) {
+ my $index = $table->add_index(
+ name => join('_', $table_name, 'idx', @keys),
+ fields => \@keys,
+ type => 'NORMAL',
+ );
+ }
+ }
}
}
+
}
-}
+ # attach the tables to the schema in dependency order
+ my $dependencies = {
+ map { $_ => _resolve_deps ($_, \%tables) } (keys %tables)
+ };
+ for my $table (sort
+ {
+ keys %{$dependencies->{$a} || {} } <=> keys %{ $dependencies->{$b} || {} }
+ ||
+ $a cmp $b
+ }
+ (keys %tables)
+ ) {
+ $schema->add_table ($tables{$table}{object});
+ $tables{$table}{source} -> _invoke_sqlt_deploy_hook( $tables{$table}{object} );
+
+ # the hook might have already removed the table
+ if ($schema->get_table($table) && $table =~ /^ \s* \( \s* SELECT \s+/ix) {
+ warn <<'EOW';
+
+Custom SQL through ->name(\'( SELECT ...') is DEPRECATED, for more details see
+"Arbitrary SQL through a custom ResultSource" in DBIx::Class::Manual::Cookbook
+or http://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class/Manual/Cookbook.pod
+
+EOW
+
+ # remove the table as there is no way someone might want to
+ # actually deploy this
+ $schema->drop_table ($table);
+ }
+ }
+
+ my %views;
+ foreach my $moniker (sort keys %view_monikers)
+ {
+ my $source = $dbicschema->source($moniker);
+ my $view_name = $source->name;
+
+ # FIXME - this isn't the right way to do it, but sqlt does not
+ # support quoting properly to be signaled about this
+ $view_name = $$view_name if ref $view_name eq 'SCALAR';
+
+ # Skip custom query sources
+ next if ref $view_name;
+
+ # Its possible to have multiple DBIC source using same table
+ next if $views{$view_name}++;
+
+ $dbicschema->throw_exception ("view $view_name is missing a view_definition")
+ unless $source->view_definition;
+
+ my $view = $schema->add_view (
+ name => $view_name,
+ fields => [ $source->columns ],
+ $source->view_definition ? ( 'sql' => $source->view_definition ) : ()
+ ) || $dbicschema->throw_exception ($schema->error);
+
+ $source->_invoke_sqlt_deploy_hook($view);
+ }
+
+
+ if ($dbicschema->can('sqlt_deploy_hook')) {
+ $dbicschema->sqlt_deploy_hook($schema);
+ }
+
+ return 1;
+}
+
+#
+# Quick and dirty dependency graph calculator
+#
+sub _resolve_deps {
+ my ($table, $tables, $seen) = @_;
+
+ my $ret = {};
+ $seen ||= {};
+
+ # copy and bump all deps by one (so we can reconstruct the chain)
+ my %seen = map { $_ => $seen->{$_} + 1 } (keys %$seen);
+ $seen{$table} = 1;
+
+ for my $dep (keys %{$tables->{$table}{foreign_table_deps}} ) {
+
+ if ($seen->{$dep}) {
+
+ # warn and remove the circular constraint so we don't get flooded with the same warning over and over
+ #carp sprintf ("Circular dependency detected, schema may not be deployable:\n%s\n",
+ # join (' -> ', (sort { $seen->{$b} <=> $seen->{$a} } (keys %$seen) ), $table, $dep )
+ #);
+ #delete $tables->{$table}{foreign_table_deps}{$dep};
+
+ return {};
+ }
+
+ my $subdeps = _resolve_deps ($dep, $tables, \%seen);
+ $ret->{$_} += $subdeps->{$_} for ( keys %$subdeps );
+
+ ++$ret->{$dep};
+ }
+
+ return $ret;
+}
1;
+
+=head1 NAME
+
+SQL::Translator::Parser::DBIx::Class - Create a SQL::Translator schema
+from a DBIx::Class::Schema instance
+
+=head1 SYNOPSIS
+
+ ## Via DBIx::Class
+ use MyApp::Schema;
+ my $schema = MyApp::Schema->connect("dbi:SQLite:something.db");
+ $schema->create_ddl_dir();
+ ## or
+ $schema->deploy();
+
+ ## Standalone
+ use MyApp::Schema;
+ use SQL::Translator;
+
+ my $schema = MyApp::Schema->connect;
+ my $trans = SQL::Translator->new (
+ parser => 'SQL::Translator::Parser::DBIx::Class',
+ parser_args => { package => $schema },
+ producer => 'SQLite',
+ ) or die SQL::Translator->error;
+ my $out = $trans->translate() or die $trans->error;
+
+=head1 DESCRIPTION
+
+This class requires L<SQL::Translator> installed to work.
+
+C<SQL::Translator::Parser::DBIx::Class> reads a DBIx::Class schema,
+interrogates the columns, and stuffs it all in an $sqlt_schema object.
+
+Its primary use is in deploying database layouts described as a set
+of L<DBIx::Class> classes, to a database. To do this, see
+L<DBIx::Class::Schema/deploy>.
+
+This can also be achieved by having DBIx::Class export the schema as a
+set of SQL files ready for import into your database, or passed to
+other machines that need to have your application installed but don't
+have SQL::Translator installed. To do this see
+L<DBIx::Class::Schema/create_ddl_dir>.
+
+=head1 SEE ALSO
+
+L<SQL::Translator>, L<DBIx::Class::Schema>
+
+=head1 AUTHORS
+
+Jess Robinson
+
+Matt S Trout
+
+Ash Berlin
projects / dbsrgits/DBIx-Class.git / blobdiff