package SQL::Translator::Schema;
# ----------------------------------------------------------------------
-# $Id: Schema.pm,v 1.3 2003-05-05 04:33:22 kycl4rk Exp $
+# $Id: Schema.pm,v 1.8 2003-06-18 23:14:31 kycl4rk Exp $
# ----------------------------------------------------------------------
# Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>
#
use strict;
use Class::Base;
+use SQL::Translator::Schema::Constants;
use SQL::Translator::Schema::Table;
+use SQL::Translator::Utils 'parse_list_arg';
use SQL::Translator::Schema::View;
use base 'Class::Base';
use vars qw[ $VERSION $TABLE_ORDER $VIEW_ORDER ];
-$VERSION = 1.00;
+$VERSION = sprintf "%d.%02d", q$Revision: 1.8 $ =~ /(\d+)\.(\d+)/;
# ----------------------------------------------------------------------
sub init {
same name as an existing table, you will get an error and the table will
not be created.
- my $table_foo = $schema->add_table( name => 'foo' ) or die $schema->error;
-
- my $table_bar = SQL::Translator::Schema::Table->new( name => 'bar' );
- $table_bar = $schema->add_table( $table_bar ) or die $schema->error;
+ my $t1 = $schema->add_table( name => 'foo' ) or die $schema->error;
+ my $t2 = SQL::Translator::Schema::Table->new( name => 'bar' );
+ $t2 = $schema->add_table( $table_bar ) or die $schema->error;
=cut
$self->error( $table_class->error );
}
+ $table->order( ++$TABLE_ORDER );
my $table_name = $table->name or return $self->error('No table name');
if ( defined $self->{'tables'}{ $table_name } ) {
}
else {
$self->{'tables'}{ $table_name } = $table;
- $self->{'tables'}{ $table_name }{'order'} = ++$TABLE_ORDER;
}
return $table;
same name as an existing view, you will get an error and the view will
not be created.
- my $view_foo = $schema->add_view( name => 'foo' );
-
- my $view_bar = SQL::Translator::Schema::View->new( name => 'bar' );
- $view_bar = $schema->add_view( $view_bar ) or die $schema->error;
+ my $v1 = $schema->add_view( name => 'foo' );
+ my $v2 = SQL::Translator::Schema::View->new( name => 'bar' );
+ $v2 = $schema->add_view( $view_bar ) or die $schema->error;
=cut
$view = $view_class->new( \%args ) or return $view_class->error;
}
+ $view->order( ++$VIEW_ORDER );
my $view_name = $view->name or return $self->error('No view name');
if ( defined $self->{'views'}{ $view_name } ) {
}
else {
$self->{'views'}{ $view_name } = $view;
- $self->{'views'}{ $view_name }{'order'} = ++$VIEW_ORDER;
}
return $view;
=cut
my $self = shift;
- my @tables = sort { $a->{'order'} <=> $b->{'order'} }
+ my @tables =
+ map { $_->[1] }
+ sort { $a->[0] <=> $b->[0] }
+ map { [ $_->order, $_ ] }
values %{ $self->{'tables'} };
if ( @tables ) {
=cut
my $self = shift;
- my @views = sort { $a->{'order'} <=> $b->{'order'} }
+ my @views =
+ map { $_->[1] }
+ sort { $a->[0] <=> $b->[0] }
+ map { [ $_->order, $_ ] }
values %{ $self->{'views'} };
if ( @views ) {
}
# ----------------------------------------------------------------------
+sub make_natural_joins {
+
+=pod
+
+=head2 make_natural_joins
+
+Creates foriegn key relationships among like-named fields in different
+tables. Accepts the following arguments:
+
+=over 4
+
+=item * join_pk_only
+
+A True or False argument which determins whether or not to perform
+the joins from primary keys to fields of the same name in other tables
+
+=item * skip_fields
+
+A list of fields to skip in the joins
+
+=back 4
+
+ $schema->make_natural_joins(
+ join_pk_only => 1,
+ skip_fields => 'name,department_id',
+ );
+
+=cut
+
+ my $self = shift;
+ my %args = @_;
+ my $join_pk_only = $args{'join_pk_only'} || 0;
+ my %skip_fields = map { s/^\s+|\s+$//g; $_, 1 } @{
+ parse_list_arg( $args{'skip_fields'} )
+ };
+
+ my ( %common_keys, %pk );
+ for my $table ( $self->get_tables ) {
+ for my $field ( $table->get_fields ) {
+ my $field_name = $field->name or next;
+ next if $skip_fields{ $field_name };
+ $pk{ $field_name } = 1 if $field->is_primary_key;
+ push @{ $common_keys{ $field_name } }, $table->name;
+ }
+ }
+
+ for my $field ( keys %common_keys ) {
+ next if $join_pk_only and !defined $pk{ $field };
+
+ my @table_names = @{ $common_keys{ $field } };
+ next unless scalar @table_names > 1;
+
+ for my $i ( 0 .. $#table_names ) {
+ my $table1 = $self->get_table( $table_names[ $i ] ) or next;
+
+ for my $j ( 1 .. $#table_names ) {
+ my $table2 = $self->get_table( $table_names[ $j ] ) or next;
+ next if $table1->name eq $table2->name;
+
+ $table1->add_constraint(
+ type => FOREIGN_KEY,
+ fields => $field,
+ reference_table => $table2->name,
+ reference_fields => $field,
+ );
+ }
+ }
+ }
+
+ return 1;
+}
+
+# ----------------------------------------------------------------------
sub name {
=pod
return $self->{'name'} || '';
}
+# ----------------------------------------------------------------------
+sub DESTROY {
+ my $self = shift;
+ undef $_ for values %{ $self->{'tables'} };
+ undef $_ for values %{ $self->{'views'} };
+}
+
1;
# ----------------------------------------------------------------------