package SQL::Translator::Producer::ClassDBI;
# -------------------------------------------------------------------
-# $Id: ClassDBI.pm,v 1.24 2003-06-27 02:28:11 kycl4rk Exp $
+# $Id: ClassDBI.pm,v 1.25 2003-06-27 02:59:25 kycl4rk Exp $
# -------------------------------------------------------------------
# Copyright (C) 2003 Allen Day <allenday@ucla.edu>,
# Ying Zhang <zyolive@yahoo.com>
use strict;
use vars qw[ $VERSION $DEBUG ];
-$VERSION = sprintf "%d.%02d", q$Revision: 1.24 $ =~ /(\d+)\.(\d+)/;
+$VERSION = sprintf "%d.%02d", q$Revision: 1.25 $ =~ /(\d+)\.(\d+)/;
$DEBUG = 1 unless defined $DEBUG;
use SQL::Translator::Schema::Constants;
? $CDBI_auto_pkgs{ $parser_type } : $parser_type
);
my $sep = '# ' . '-' x 67;
+
+ #
+ # Identify "link tables" (have only PK and FK fields).
+ #
+ my %linkable;
+ my %linktable;
+ foreach my $table ( $schema->get_tables ) {
+ my $is_link = 1;
+ foreach my $field ( $table->get_fields ) {
+ unless ( $field->is_primary_key or $field->is_foreign_key ) {
+ $is_link = 0;
+ last;
+ }
+ }
+
+ next unless $is_link;
+
+ foreach my $left ( $table->get_fields ) {
+ next unless $left->is_foreign_key;
+ my $lfk = $left->foreign_key_reference or next;
+ my $lr_table = $schema->get_table( $lfk->reference_table )
+ or next;
+ my $lr_field_name = ($lfk->reference_fields)[0];
+ my $lr_field = $lr_table->get_field($lr_field_name);
+ next unless $lr_field->is_primary_key;
+
+ foreach my $right ( $table->get_fields ) {
+ next if $left->name eq $right->name;
+
+ my $rfk = $right->foreign_key_reference or next;
+ my $rr_table = $schema->get_table( $rfk->reference_table )
+ or next;
+ my $rr_field_name = ($rfk->reference_fields)[0];
+ my $rr_field = $rr_table->get_field($rr_field_name);
+ next unless $rr_field->is_primary_key;
+
+ $linkable{ $lr_table }{ $rr_table } = $table;
+ $linkable{ $rr_table }{ $lr_table } = $table;
+ $linktable{ $table->name } = $table;
+ }
+ }
+ }
#
# Iterate over all tables
#
# Use foreign keys to set up "has_a/has_many" relationships.
#
+ my $is_data = 0;
foreach my $field ( $table->get_fields ) {
+ $is_data++ if !$field->is_foreign_key and !$field->is_primary_key;
if ( $field->is_foreign_key ) {
my $table_name = $table->name;
my $field_name = $field->name;
}
}
- #
- # Identify link tables, defined as tables that have
- # only PK and FK fields.
- #
-# my %linkable;
-# my %linktable;
-# foreach my $table ( $schema->get_tables ) {
-# my $is_link = 1;
-# foreach my $field ( $table->get_fields ) {
-# unless ( $field->is_primary_key or $field->is_foreign_key ) {
-# $is_link = 0;
-# last;
-# }
-# }
-#
-# if ( $is_link ) {
-# foreach my $left ( $table->get_fields ) {
-# next unless $left->is_foreign_key and $schema->get_table(
-# $left->foreign_key_reference->reference_table
-# );
-#
-# next unless $left->is_foreign_key and $schema->get_table(
-# $left->foreign_key_reference->reference_table
-# )->get_field(
-# ($left->foreign_key_reference->reference_fields)[0]
-# )->is_primary_key;
-#
-# foreach my $right ( $table->get_fields ) {
-# #skip the diagonal
-# next if $left->name eq $right->name;
-#
-# next unless $right->is_foreign_key and
-# $schema->get_table(
-# $right->foreign_key_reference->reference_table
-# )
-# ;
-#
-# next unless $right->is_foreign_key and
-# $schema->get_table(
-# $right->foreign_key_reference->reference_table
-# )->get_field(
-# ($right->foreign_key_reference->reference_fields)[0]
-# )->is_primary_key
-# ;
-#
-#
-# $linkable{
-# $left->foreign_key_reference->reference_table
-# }{
-# $right->foreign_key_reference->reference_table
-# } = $table;
-#
-# $linkable{
-# $right->foreign_key_reference->reference_table
-# }{
-# $left->foreign_key_reference->reference_table
-# } = $table;
-#
-# $linktable{ $table->name } = $table;
-# }
-# }
-# }
-# }
-#
-# #
-# # Generate many-to-many linking methods for data tables
-# #
-# my $is_data = 0;
-# for ( $table->get_fields ) {
-# $is_data++ if !$_->is_foreign_key and !$_->is_primary_key;
-# }
-#
-# my %linked;
-# if ( $is_data ) {
-# foreach my $link ( keys %{ $linkable{ $table->name } } ) {
-# my $linkmethodname =
-# "_".$t->format_fk_name($table->name,$link)."_refs"
-# ;
-#
-# $create .= $t->format_package_name($table->name).
-# "->has_many('$linkmethodname','".
-# $t->format_package_name(
-# $linkable{$table->name}{$link}->name
-# )."','".
-# ($schema->get_table($link)->primary_key->fields)[0]."');\n"
-# ;
-#
+ my %linked;
+ if ( $is_data ) {
+ foreach my $link ( keys %{ $linkable{ $table_name } } ) {
+ my $linkmethodname =
+ "_".$t->format_fk_name($table->name,$link)."_refs"
+ ;
+
+ push @{ $packages{ $table_name }{'has_many'} },
+ "$table_pkg_name->has_many(\n ".
+ "'$linkmethodname', ".
+ $t->format_package_name(
+ $linkable{ $table->name }{ $link }->name
+ )."','".
+ ($schema->get_table($link)->primary_key->fields)[0].
+ "');\n\n"
+ ;
+
+ #
+ # I'm not sure what to do with this code. - ky
+ #
+
# $create .= "sub ". $t->format_fk_name($table,$link).
# # HARDCODED 's' HERE.
# # ADD CALLBACK FOR PLURALIZATION MANGLING
# "s {\n my \$self = shift; return map \$_->".$link.
# ", \$self->".$linkmethodname.";\n}\n\n"
# ;
-# }
-# }
+ }
+ }
}
+ #
+ # Now build up text of package.
+ #
my $base_pkg = sprintf( 'Class::DBI%s', $from ? "::$from" : '' );
my $create = join("\n",
"package $main_pkg_name;\n",