X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSQL%2FTranslator%2FParser%2FDBIx%2FClass.pm;h=5b313ba8c75f26ab4a320d4cbeac2b963a792435;hb=5f5e87cf7c30224adfc28a6e9ffc7a6838eae421;hp=92a620432c7cf9779850613c1f34dfe56877ba4b;hpb=880a1a0cc6a48a3165656fe5daf7ec288901c3e2;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/SQL/Translator/Parser/DBIx/Class.pm b/lib/SQL/Translator/Parser/DBIx/Class.pm index 92a6204..5b313ba 100644 --- a/lib/SQL/Translator/Parser/DBIx/Class.pm +++ b/lib/SQL/Translator/Parser/DBIx/Class.pm @@ -1,15 +1,16 @@ -package # hide from PAUSE +package # hide from PAUSE SQL::Translator::Parser::DBIx::Class; # AUTHOR: Jess Robinson # Some mistakes the fault of Matt S Trout +# Others the fault of Ash Berlin + use strict; use warnings; -use vars qw($DEBUG $VERSION @EXPORT_OK); +use vars qw($DEBUG @EXPORT_OK); $DEBUG = 0 unless defined $DEBUG; -$VERSION = sprintf "%d.%02d", q$Revision 1.0$ =~ /(\d+)\.(\d+)/; use Exporter; use Data::Dumper; @@ -22,32 +23,68 @@ use base qw(Exporter); # ------------------------------------------------------------------- # parse($tr, $data) # +# 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 ||= $args->{'package'}; + my ($tr, $data) = @_; + my $args = $tr->parser_args; + my $dbicschema = $args->{'DBIx::Class::Schema'} || $args->{"DBIx::Schema"} ||$data; + $dbicschema ||= $args->{'package'}; + my $limit_sources = $args->{'sources'}; - die 'No DBIx::Schema' unless ($dbixschema); - if (!ref $dbixschema) { - eval "use $dbixschema;"; - die "Can't load $dbixschema ($@)" if($@); + die 'No DBIx::Class::Schema' unless ($dbicschema); + if (!ref $dbicschema) { + eval "use $dbicschema;"; + die "Can't load $dbicschema ($@)" if($@); } my $schema = $tr->schema; my $table_no = 0; -# print Dumper($dbixschema->registered_classes); + $schema->name( ref($dbicschema) . " v" . ($dbicschema->VERSION || '1.x')) + unless ($schema->name); + + my %seen_tables; + + my @monikers = sort $dbicschema->sources; + if ($limit_sources) { + my $ref = ref $limit_sources || ''; + die "'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); + next if $source->is_virtual; + if ( $source->isa('DBIx::Class::ResultSource::Table') ) { + push(@table_monikers, $moniker); + } elsif( $source->isa('DBIx::Class::ResultSource::View') ){ + push(@view_monikers, $moniker); + } + } - #foreach my $tableclass ($dbixschema->registered_classes) - foreach my $moniker ($dbixschema->sources) + foreach my $moniker (sort @table_monikers) { - #eval "use $tableclass"; - #print("Can't load $tableclass"), next if($@); - my $source = $dbixschema->source($moniker); + my $source = $dbicschema->source($moniker); + + # Skip custom query sources + next if ref($source->name); + + # Its possible to have multiple DBIC source using same table + next if $seen_tables{$source->name}++; my $table = $schema->add_table( name => $source->name, @@ -56,7 +93,7 @@ sub parse { 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, @@ -73,39 +110,150 @@ sub parse { } $table->primary_key($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)) ? 0 : 1; + + foreach my $rel (sort @rels) { my $rel_info = $source->relationship_info($rel); - 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 is 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 = $source->related_source($rel)->name; - my $cond = (keys (%{$rel_info->{cond}}))[0]; - my ($refkey) = $cond =~ /^\w+\.(\w+)$/; - my ($key) = $rel_info->{cond}->{$cond} =~ /^\w+\.(\w+)$/; - if($rel_table && $refkey) - { - $table->add_constraint( - type => 'foreign_key', - name => "fk_${key}", - fields => $key, - 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 $othertable = $source->related_source($rel); + my $rel_table = $othertable->name; + + 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 } $othertable->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} 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"}; + } + else { + warn "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", @keys); + next if $created_FK_rels{$rel_table}->{$key_test}; + + my $is_deferrable = $rel_info->{attrs}{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; + + + $created_FK_rels{$rel_table}->{$key_test} = 1; + if (scalar(@keys)) { + $table->add_constraint( + type => 'foreign_key', + name => join('_', $table->name, 'fk', @keys), + fields => \@keys, + reference_fields => \@refkeys, + reference_table => $rel_table, + on_delete => $cascade->{delete}, + on_update => $cascade->{update}, + (defined $is_deferrable ? ( deferrable => $is_deferrable ) : ()), + ); + + if ($add_fk_index_rel) { + my $index = $table->add_index( + name => join('_', $table->name, 'idx', @keys), + fields => \@keys, + type => 'NORMAL', + ); + } + } } } + + if ($source->result_class->can('sqlt_deploy_hook')) { + $source->result_class->sqlt_deploy_hook($table); + } + } + + foreach my $moniker (sort @view_monikers) + { + my $source = $dbicschema->source($moniker); + # Skip custom query sources + next if ref($source->name); + + # Its possible to have multiple DBIC source using same table + next if $seen_tables{$source->name}++; + + my $view = $schema->add_view( + name => $source->name, + fields => [ $source->columns ], + ($source->view_definition ? $source->view_definition : ()) + ); + if ($source->result_class->can('sqlt_deploy_hook')) { + $source->result_class->sqlt_deploy_hook($view); + } + } + + + if ($dbicschema->can('sqlt_deploy_hook')) { + $dbicschema->sqlt_deploy_hook($schema); } -} + return 1; +} 1;