package SQL::Translator::Schema;
# ----------------------------------------------------------------------
-# $Id: Schema.pm,v 1.14 2004-03-23 21:12:22 grommit Exp $
-# ----------------------------------------------------------------------
-# Copyright (C) 2002-4 SQLFairy Authors
+# Copyright (C) 2002-2009 SQLFairy Authors
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
=head1 SYNOPSIS
use SQL::Translator::Schema;
- my $schema = SQL::Translator::Schema->new;
- my $table = $schema->add_table( name => 'foo' );
- my $view = $schema->add_view( name => 'bar', sql => '...' );
+ my $schema = SQL::Translator::Schema->new(
+ name => 'Foo',
+ database => 'MySQL',
+ );
+ my $table = $schema->add_table( name => 'foo' );
+ my $view = $schema->add_view( name => 'bar', sql => '...' );
+
=head1 DESCSIPTION
=cut
use strict;
-use Class::Base;
use SQL::Translator::Schema::Constants;
use SQL::Translator::Schema::Procedure;
use SQL::Translator::Schema::Table;
use SQL::Translator::Schema::Trigger;
use SQL::Translator::Schema::View;
+
use SQL::Translator::Utils 'parse_list_arg';
-use base 'Class::Base';
-use vars qw[ $VERSION $TABLE_ORDER $VIEW_ORDER $TRIGGER_ORDER $PROC_ORDER ];
+use base 'SQL::Translator::Schema::Object';
+use vars qw[ $VERSION ];
+
+$VERSION = '1.59';
+
+__PACKAGE__->_attributes(qw/name database translator/);
+
+sub new {
+ my $class = shift;
+ my $self = $class->SUPER::new (@_)
+ or return;
+
+ $self->{_order} = { map { $_ => 0 } qw/
+ table
+ view
+ trigger
+ proc
+ /};
-$VERSION = sprintf "%d.%02d", q$Revision: 1.14 $ =~ /(\d+)\.(\d+)/;
+ return $self;
+}
# ----------------------------------------------------------------------
-sub init {
+sub as_graph {
=pod
-=head2 new
+=head2 as_graph
-Object constructor.
+Returns the schema as an L<SQL::Translator::Schema::Graph> object.
- my $schema = SQL::Translator->new(
- name => 'Foo',
- database => 'MySQL',
- );
+=cut
+ require SQL::Translator::Schema::Graph;
+
+ my $self = shift;
+
+ return SQL::Translator::Schema::Graph->new(
+ translator => $self->translator );
+}
+
+# ----------------------------------------------------------------------
+sub as_graph_pm {
+
+=pod
+
+=head2 as_graph_pm
+
+Returns a Graph::Directed object with the table names for nodes.
=cut
- my ( $self, $config ) = @_;
- $self->params( $config, qw[ name database ] ) || return undef;
- return $self;
+ require Graph::Directed;
+
+ my $self = shift;
+ my $g = Graph::Directed->new;
+
+ for my $table ( $self->get_tables ) {
+ my $tname = $table->name;
+ $g->add_vertex( $tname );
+
+ for my $field ( $table->get_fields ) {
+ if ( $field->is_foreign_key ) {
+ my $fktable = $field->foreign_key_reference->reference_table;
+
+ $g->add_edge( $fktable, $tname );
+ }
+ }
+ }
+
+ return $g;
}
# ----------------------------------------------------------------------
if ( UNIVERSAL::isa( $_[0], $table_class ) ) {
$table = shift;
- $table->schema( $self );
+ $table->schema($self);
}
else {
- my %args = @_;
+ my %args = ref $_[0] eq 'HASH' ? %{ $_[0] } : @_;
$args{'schema'} = $self;
- $table = $table_class->new( \%args ) or return
- $self->error( $table_class->error );
+ $table = $table_class->new( \%args )
+ or return $self->error( $table_class->error );
}
- $table->order( ++$TABLE_ORDER );
+ $table->order( ++$self->{_order}{table} );
+
# We know we have a name as the Table->new above errors if none given.
my $table_name = $table->name;
- if ( defined $self->{'tables'}{ $table_name } ) {
+ if ( defined $self->{'tables'}{$table_name} ) {
return $self->error(qq[Can't create table: "$table_name" exists]);
}
else {
- $self->{'tables'}{ $table_name } = $table;
+ $self->{'tables'}{$table_name} = $table;
+ }
+
+ return $table;
+}
+
+# ----------------------------------------------------------------------
+sub drop_table {
+
+=pod
+
+=head2 drop_table
+
+Remove a table from the schema. Returns the table object if the table was found
+and removed, an error otherwise. The single parameter can be either a table
+name or an C<SQL::Translator::Schema::Table> object. The "cascade" parameter
+can be set to 1 to also drop all triggers on the table, default is 0.
+
+ $schema->drop_table('mytable');
+ $schema->drop_table('mytable', cascade => 1);
+
+=cut
+
+ my $self = shift;
+ my $table_class = 'SQL::Translator::Schema::Table';
+ my $table_name;
+
+ if ( UNIVERSAL::isa( $_[0], $table_class ) ) {
+ $table_name = shift->name;
+ }
+ else {
+ $table_name = shift;
+ }
+ my %args = @_;
+ my $cascade = $args{'cascade'};
+
+ if ( !exists $self->{'tables'}{$table_name} ) {
+ return $self->error(qq[Can't drop table: $table_name" doesn't exist]);
}
+ my $table = delete $self->{'tables'}{$table_name};
+
+ if ($cascade) {
+
+ # Drop all triggers on this table
+ $self->drop_trigger()
+ for ( grep { $_->on_table eq $table_name } @{ $self->{'triggers'} } );
+ }
return $table;
}
=head2 add_procedure
-Add a procedure object. Returns the new
-SQL::Translator::Schema::Procedure object. The "name" parameter is
-required. If you try to create a procedure with the same name as an
-existing procedure, you will get an error and the procedure will not
-be created.
+Add a procedure object. Returns the new SQL::Translator::Schema::Procedure
+object. The "name" parameter is required. If you try to create a procedure
+with the same name as an existing procedure, you will get an error and the
+procedure will not be created.
my $p1 = $schema->add_procedure( name => 'foo' );
my $p2 = SQL::Translator::Schema::Procedure->new( name => 'bar' );
if ( UNIVERSAL::isa( $_[0], $procedure_class ) ) {
$procedure = shift;
- $procedure->schema( $self );
+ $procedure->schema($self);
}
else {
- my %args = @_;
+ my %args = ref $_[0] eq 'HASH' ? %{ $_[0] } : @_;
$args{'schema'} = $self;
return $self->error('No procedure name') unless $args{'name'};
- $procedure = $procedure_class->new( \%args ) or
- return $self->error( $procedure_class->error );
+ $procedure = $procedure_class->new( \%args )
+ or return $self->error( $procedure_class->error );
}
- $procedure->order( ++$PROC_ORDER );
- my $procedure_name = $procedure->name or return
- $self->error('No procedure name');
+ $procedure->order( ++$self->{_order}{proc} );
+ my $procedure_name = $procedure->name
+ or return $self->error('No procedure name');
- if ( defined $self->{'procedures'}{ $procedure_name } ) {
+ if ( defined $self->{'procedures'}{$procedure_name} ) {
return $self->error(
- qq[Can't create procedure: "$procedure_name" exists]
- );
+ qq[Can't create procedure: "$procedure_name" exists] );
}
else {
- $self->{'procedures'}{ $procedure_name } = $procedure;
+ $self->{'procedures'}{$procedure_name} = $procedure;
}
return $procedure;
}
# ----------------------------------------------------------------------
+sub drop_procedure {
+
+=pod
+
+=head2 drop_procedure
+
+Remove a procedure from the schema. Returns the procedure object if the
+procedure was found and removed, an error otherwise. The single parameter
+can be either a procedure name or an C<SQL::Translator::Schema::Procedure>
+object.
+
+ $schema->drop_procedure('myprocedure');
+
+=cut
+
+ my $self = shift;
+ my $proc_class = 'SQL::Translator::Schema::Procedure';
+ my $proc_name;
+
+ if ( UNIVERSAL::isa( $_[0], $proc_class ) ) {
+ $proc_name = shift->name;
+ }
+ else {
+ $proc_name = shift;
+ }
+
+ if ( !exists $self->{'procedures'}{$proc_name} ) {
+ return $self->error(
+ qq[Can't drop procedure: $proc_name" doesn't exist]);
+ }
+
+ my $proc = delete $self->{'procedures'}{$proc_name};
+
+ return $proc;
+}
+
+# ----------------------------------------------------------------------
sub add_trigger {
=pod
if ( UNIVERSAL::isa( $_[0], $trigger_class ) ) {
$trigger = shift;
- $trigger->schema( $self );
+ $trigger->schema($self);
}
else {
- my %args = @_;
+ my %args = ref $_[0] eq 'HASH' ? %{ $_[0] } : @_;
$args{'schema'} = $self;
return $self->error('No trigger name') unless $args{'name'};
- $trigger = $trigger_class->new( \%args ) or
- return $self->error( $trigger_class->error );
+ $trigger = $trigger_class->new( \%args )
+ or return $self->error( $trigger_class->error );
}
- $trigger->order( ++$TRIGGER_ORDER );
- my $trigger_name = $trigger->name or return $self->error('No trigger name');
+ $trigger->order( ++$self->{_order}{trigger} );
- if ( defined $self->{'triggers'}{ $trigger_name } ) {
+ my $trigger_name = $trigger->name or return $self->error('No trigger name');
+ if ( defined $self->{'triggers'}{$trigger_name} ) {
return $self->error(qq[Can't create trigger: "$trigger_name" exists]);
}
else {
- $self->{'triggers'}{ $trigger_name } = $trigger;
+ $self->{'triggers'}{$trigger_name} = $trigger;
}
return $trigger;
}
# ----------------------------------------------------------------------
+sub drop_trigger {
+
+=pod
+
+=head2 drop_trigger
+
+Remove a trigger from the schema. Returns the trigger object if the trigger was
+found and removed, an error otherwise. The single parameter can be either a
+trigger name or an C<SQL::Translator::Schema::Trigger> object.
+
+ $schema->drop_trigger('mytrigger');
+
+=cut
+
+ my $self = shift;
+ my $trigger_class = 'SQL::Translator::Schema::Trigger';
+ my $trigger_name;
+
+ if ( UNIVERSAL::isa( $_[0], $trigger_class ) ) {
+ $trigger_name = shift->name;
+ }
+ else {
+ $trigger_name = shift;
+ }
+
+ if ( !exists $self->{'triggers'}{$trigger_name} ) {
+ return $self->error(
+ qq[Can't drop trigger: $trigger_name" doesn't exist]);
+ }
+
+ my $trigger = delete $self->{'triggers'}{$trigger_name};
+
+ return $trigger;
+}
+
+# ----------------------------------------------------------------------
sub add_view {
=pod
=cut
- my $self = shift;
+ my $self = shift;
my $view_class = 'SQL::Translator::Schema::View';
my $view;
if ( UNIVERSAL::isa( $_[0], $view_class ) ) {
$view = shift;
- $view->schema( $self );
+ $view->schema($self);
}
else {
- my %args = @_;
+ my %args = ref $_[0] eq 'HASH' ? %{ $_[0] } : @_;
$args{'schema'} = $self;
return $self->error('No view name') unless $args{'name'};
$view = $view_class->new( \%args ) or return $view_class->error;
}
- $view->order( ++$VIEW_ORDER );
+ $view->order( ++$self->{_order}{view} );
my $view_name = $view->name or return $self->error('No view name');
- if ( defined $self->{'views'}{ $view_name } ) {
+ if ( defined $self->{'views'}{$view_name} ) {
return $self->error(qq[Can't create view: "$view_name" exists]);
}
else {
- $self->{'views'}{ $view_name } = $view;
+ $self->{'views'}{$view_name} = $view;
+ }
+
+ return $view;
+}
+
+# ----------------------------------------------------------------------
+sub drop_view {
+
+=pod
+
+=head2 drop_view
+
+Remove a view from the schema. Returns the view object if the view was found
+and removed, an error otherwise. The single parameter can be either a view
+name or an C<SQL::Translator::Schema::View> object.
+
+ $schema->drop_view('myview');
+
+=cut
+
+ my $self = shift;
+ my $view_class = 'SQL::Translator::Schema::View';
+ my $view_name;
+
+ if ( UNIVERSAL::isa( $_[0], $view_class ) ) {
+ $view_name = shift->name;
+ }
+ else {
+ $view_name = shift;
}
+ if ( !exists $self->{'views'}{$view_name} ) {
+ return $self->error(qq[Can't drop view: $view_name" doesn't exist]);
+ }
+
+ my $view = delete $self->{'views'}{$view_name};
+
return $view;
}
=cut
- my $self = shift;
+ my $self = shift;
my $procedure_name = shift or return $self->error('No procedure name');
- return $self->error( qq[Table "$procedure_name" does not exist] ) unless
- exists $self->{'procedures'}{ $procedure_name };
- return $self->{'procedures'}{ $procedure_name };
+ return $self->error(qq[Table "$procedure_name" does not exist])
+ unless exists $self->{'procedures'}{$procedure_name};
+ return $self->{'procedures'}{$procedure_name};
}
# ----------------------------------------------------------------------
=cut
- my $self = shift;
- my @procedures =
- map { $_->[1] }
- sort { $a->[0] <=> $b->[0] }
- map { [ $_->order, $_ ] }
- values %{ $self->{'procedures'} };
+ my $self = shift;
+ my @procedures =
+ map { $_->[1] }
+ sort { $a->[0] <=> $b->[0] }
+ map { [ $_->order, $_ ] } values %{ $self->{'procedures'} };
- if ( @procedures ) {
+ if (@procedures) {
return wantarray ? @procedures : \@procedures;
}
else {
=cut
- my $self = shift;
+ my $self = shift;
my $table_name = shift or return $self->error('No table name');
- return $self->error( qq[Table "$table_name" does not exist] ) unless
- exists $self->{'tables'}{ $table_name };
- return $self->{'tables'}{ $table_name };
+ my $case_insensitive = shift;
+ if ( $case_insensitive ) {
+ $table_name = uc($table_name);
+ foreach my $table ( keys %{$self->{tables}} ) {
+ return $self->{tables}{$table} if $table_name eq uc($table);
+ }
+ return $self->error(qq[Table "$table_name" does not exist]);
+ }
+ return $self->error(qq[Table "$table_name" does not exist])
+ unless exists $self->{'tables'}{$table_name};
+ return $self->{'tables'}{$table_name};
}
# ----------------------------------------------------------------------
=cut
my $self = shift;
- my @tables =
- map { $_->[1] }
- sort { $a->[0] <=> $b->[0] }
- map { [ $_->order, $_ ] }
- values %{ $self->{'tables'} };
+ my @tables =
+ map { $_->[1] }
+ sort { $a->[0] <=> $b->[0] }
+ map { [ $_->order, $_ ] } values %{ $self->{'tables'} };
- if ( @tables ) {
+ if (@tables) {
return wantarray ? @tables : \@tables;
}
else {
=cut
- my $self = shift;
+ my $self = shift;
my $trigger_name = shift or return $self->error('No trigger name');
- return $self->error( qq[Table "$trigger_name" does not exist] ) unless
- exists $self->{'triggers'}{ $trigger_name };
- return $self->{'triggers'}{ $trigger_name };
+ return $self->error(qq[Table "$trigger_name" does not exist])
+ unless exists $self->{'triggers'}{$trigger_name};
+ return $self->{'triggers'}{$trigger_name};
}
# ----------------------------------------------------------------------
=cut
- my $self = shift;
- my @triggers =
- map { $_->[1] }
- sort { $a->[0] <=> $b->[0] }
- map { [ $_->order, $_ ] }
- values %{ $self->{'triggers'} };
+ my $self = shift;
+ my @triggers =
+ map { $_->[1] }
+ sort { $a->[0] <=> $b->[0] }
+ map { [ $_->order, $_ ] } values %{ $self->{'triggers'} };
- if ( @triggers ) {
+ if (@triggers) {
return wantarray ? @triggers : \@triggers;
}
else {
=cut
- my $self = shift;
+ my $self = shift;
my $view_name = shift or return $self->error('No view name');
- return $self->error('View "$view_name" does not exist') unless
- exists $self->{'views'}{ $view_name };
- return $self->{'views'}{ $view_name };
+ return $self->error('View "$view_name" does not exist')
+ unless exists $self->{'views'}{$view_name};
+ return $self->{'views'}{$view_name};
}
# ----------------------------------------------------------------------
=cut
my $self = shift;
- my @views =
- map { $_->[1] }
- sort { $a->[0] <=> $b->[0] }
- map { [ $_->order, $_ ] }
- values %{ $self->{'views'} };
+ my @views =
+ map { $_->[1] }
+ sort { $a->[0] <=> $b->[0] }
+ map { [ $_->order, $_ ] } values %{ $self->{'views'} };
- if ( @views ) {
+ if (@views) {
return wantarray ? @views : \@views;
}
else {
=over 4
-=item * join_pk_only
+=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
A list of fields to skip in the joins
-=back 4
+=back
$schema->make_natural_joins(
join_pk_only => 1,
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( $args{'skip_fields'} )
- };
+ my %skip_fields =
+ map { s/^\s+|\s+$//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;
+ 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 };
+ next if $join_pk_only and !defined $pk{$field};
- my @table_names = @{ $common_keys{ $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;
+ 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;
+ my $table2 = $self->get_table( $table_names[$j] ) or next;
next if $table1->name eq $table2->name;
$table1->add_constraint(
reference_table => $table2->name,
reference_fields => $field,
);
- }
+ }
}
- }
+ }
return 1;
}
}
# ----------------------------------------------------------------------
+sub translator {
+
+=pod
+
+=head2 translator
+
+Get the SQL::Translator instance that instantiated the parser.
+
+=cut
+
+ my $self = shift;
+ $self->{'translator'} = shift if @_;
+ return $self->{'translator'};
+}
+
+# ----------------------------------------------------------------------
sub DESTROY {
my $self = shift;
undef $_ for values %{ $self->{'tables'} };
- undef $_ for values %{ $self->{'views'} };
+ undef $_ for values %{ $self->{'views'} };
}
1;
=head1 AUTHOR
-Ken Y. Clark E<lt>kclark@cpan.orgE<gt>
+Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>.
=cut
+
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