1 package SQL::Translator::Schema::Table;
3 # ----------------------------------------------------------------------
4 # $Id: Table.pm,v 1.6 2003-06-06 00:10:32 kycl4rk Exp $
5 # ----------------------------------------------------------------------
6 # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>
8 # This program is free software; you can redistribute it and/or
9 # modify it under the terms of the GNU General Public License as
10 # published by the Free Software Foundation; version 2.
12 # This program is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 # General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program; if not, write to the Free Software
19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 # -------------------------------------------------------------------
27 SQL::Translator::Schema::Table - SQL::Translator table object
31 use SQL::Translator::Schema::Table;
32 my $table = SQL::Translator::Schema::Table->new( name => 'foo' );
36 C<SQL::Translator::Schema::Table> is the table object.
44 use SQL::Translator::Utils 'parse_list_arg';
45 use SQL::Translator::Schema::Constants;
46 use SQL::Translator::Schema::Constraint;
47 use SQL::Translator::Schema::Field;
48 use SQL::Translator::Schema::Index;
50 use base 'Class::Base';
51 use vars qw( $VERSION $FIELD_ORDER );
55 # ----------------------------------------------------------------------
64 my $table = SQL::Translator::Schema::Table->new(
71 my ( $self, $config ) = @_;
73 for my $arg ( qw[ schema name ] ) {
74 next unless defined $config->{ $arg };
75 $self->$arg( $config->{ $arg } ) or return;
81 # ----------------------------------------------------------------------
88 Add a constraint to the table. Returns the newly created
89 C<SQL::Translator::Schema::Constraint> object.
91 my $c1 = $table->add_constraint(
94 fields => [ 'foo_id' ],
97 my $c2 = SQL::Translator::Schema::Constraint->new( name => 'uniq' );
98 $c2 = $table->add_constraint( $constraint );
103 my $constraint_class = 'SQL::Translator::Schema::Constraint';
106 if ( UNIVERSAL::isa( $_[0], $constraint_class ) ) {
108 $constraint->table( $self );
112 $args{'table'} = $self;
113 $constraint = $constraint_class->new( \%args ) or
114 return $self->error( $constraint_class->error );
118 # If we're trying to add a PK when one is already defined,
119 # then just add the fields to the existing definition.
122 my $pk = $self->primary_key;
123 if ( $pk && $constraint->type eq PRIMARY_KEY ) {
124 $self->primary_key( $constraint->fields );
128 my @field_names = $constraint->fields;
132 grep { $_->type eq $constraint->type }
133 $self->get_constraints
135 my %fields = map { $_, 1 } $c->fields;
136 for my $field_name ( @field_names ) {
137 if ( $fields{ $field_name } ) {
148 push @{ $self->{'constraints'} }, $constraint;
154 # ----------------------------------------------------------------------
161 Add an index to the table. Returns the newly created
162 C<SQL::Translator::Schema::Index> object.
164 my $i1 = $table->add_index(
166 fields => [ 'name' ],
170 my $i2 = SQL::Translator::Schema::Index->new( name => 'id' );
171 $i2 = $table->add_index( $index );
176 my $index_class = 'SQL::Translator::Schema::Index';
179 if ( UNIVERSAL::isa( $_[0], $index_class ) ) {
181 $index->table( $self );
185 $args{'table'} = $self;
186 $index = $index_class->new( \%args ) or return
187 $self->error( $index_class->error );
190 push @{ $self->{'indices'} }, $index;
194 # ----------------------------------------------------------------------
201 Add an field to the table. Returns the newly created
202 C<SQL::Translator::Schema::Field> object. The "name" parameter is
203 required. If you try to create a field with the same name as an
204 existing field, you will get an error and the field will not be created.
206 my $f1 = $table->add_field(
208 data_type => 'integer',
212 my $f2 = SQL::Translator::Schema::Field->new(
216 $f2 = $table->add_field( $field2 ) or die $table->error;
221 my $field_class = 'SQL::Translator::Schema::Field';
224 if ( UNIVERSAL::isa( $_[0], $field_class ) ) {
226 $field->table( $self );
230 $args{'table'} = $self;
231 $field = $field_class->new( \%args ) or return
232 $self->error( $field_class->error );
235 $field->order( ++$FIELD_ORDER );
236 my $field_name = $field->name or return $self->error('No name');
238 if ( exists $self->{'fields'}{ $field_name } ) {
239 return $self->error(qq[Can't create field: "$field_name" exists]);
242 $self->{'fields'}{ $field_name } = $field;
248 # ----------------------------------------------------------------------
249 sub get_constraints {
253 =head2 get_constraints
255 Returns all the constraint objects as an array or array reference.
257 my @constraints = $table->get_constraints;
263 if ( ref $self->{'constraints'} ) {
265 ? @{ $self->{'constraints'} } : $self->{'constraints'};
268 $self->error('No constraints');
269 return wantarray ? () : undef;
273 # ----------------------------------------------------------------------
280 Returns all the index objects as an array or array reference.
282 my @indices = $table->get_indices;
288 if ( ref $self->{'indices'} ) {
290 ? @{ $self->{'indices'} }
291 : $self->{'indices'};
294 $self->error('No indices');
295 return wantarray ? () : undef;
299 # ----------------------------------------------------------------------
306 Returns a field by the name provided.
308 my $field = $table->get_field('foo');
313 my $field_name = shift or return $self->error('No field name');
314 return $self->error( qq[Field "$field_name" does not exist] ) unless
315 exists $self->{'fields'}{ $field_name };
316 return $self->{'fields'}{ $field_name };
319 # ----------------------------------------------------------------------
326 Returns all the field objects as an array or array reference.
328 my @fields = $table->get_fields;
335 sort { $a->[0] <=> $b->[0] }
336 map { [ $_->order, $_ ] }
337 values %{ $self->{'fields'} || {} };
340 return wantarray ? @fields : \@fields;
343 $self->error('No fields');
344 return wantarray ? () : undef;
348 # ----------------------------------------------------------------------
355 Determine whether the view is valid or not.
357 my $ok = $view->is_valid;
362 return $self->error('No name') unless $self->name;
363 return $self->error('No fields') unless $self->get_fields;
366 $self->get_fields, $self->get_indices, $self->get_constraints
368 return $object->error unless $object->is_valid;
374 # ----------------------------------------------------------------------
381 Get or set the table's name.
383 If provided an argument, checks the schema object for a table of
384 that name and disallows the change if one exists.
386 my $table_name = $table->name('foo');
392 if ( my $arg = shift ) {
393 if ( my $schema = $self->schema ) {
394 return $self->error( qq[Can't use table name "$arg": table exists] )
395 if $schema->get_table( $arg );
397 $self->{'name'} = $arg;
400 return $self->{'name'} || '';
403 # ----------------------------------------------------------------------
410 Get or set the table's schema object.
412 my $schema = $table->schema;
417 if ( my $arg = shift ) {
418 return $self->error('Not a schema object') unless
419 UNIVERSAL::isa( $arg, 'SQL::Translator::Schema' );
420 $self->{'schema'} = $arg;
423 return $self->{'schema'};
426 # ----------------------------------------------------------------------
433 Gets or sets the table's primary key(s). Takes one or more field
434 names (as a string, list or array[ref]) as an argument. If the field
435 names are present, it will create a new PK if none exists, or it will
436 add to the fields of an existing PK (and will unique the field names).
437 Returns the C<SQL::Translator::Schema::Constraint> object representing
442 $table->primary_key('id');
443 $table->primary_key(['name']);
444 $table->primary_key('id','name']);
445 $table->primary_key(['id','name']);
446 $table->primary_key('id,name');
447 $table->primary_key(qw[ id name ]);
449 my $pk = $table->primary_key;
454 my $fields = parse_list_arg( @_ );
458 for my $f ( @$fields ) {
459 return $self->error(qq[Invalid field "$f"]) unless
460 $self->get_field($f);
464 for my $c ( $self->get_constraints ) {
465 if ( $c->type eq PRIMARY_KEY ) {
467 $c->fields( @{ $c->fields }, @$fields );
473 $constraint = $self->add_constraint(
484 for my $c ( $self->get_constraints ) {
485 return $c if $c->type eq PRIMARY_KEY;
492 # ----------------------------------------------------------------------
499 Get or set the table's options (e.g., table types for MySQL). Returns
500 an array or array reference.
502 my @options = $table->options;
507 my $options = parse_list_arg( @_ );
509 push @{ $self->{'options'} }, @$options;
511 if ( ref $self->{'options'} ) {
512 return wantarray ? @{ $self->{'options'} || [] } : $self->{'options'};
515 return wantarray ? () : [];
519 # ----------------------------------------------------------------------
526 Get or set the table's order.
528 my $order = $table->order(3);
532 my ( $self, $arg ) = @_;
534 if ( defined $arg && $arg =~ /^\d+$/ ) {
535 $self->{'order'} = $arg;
538 return $self->{'order'} || 0;
541 # ----------------------------------------------------------------------
544 undef $self->{'schema'}; # destroy cyclical reference
545 undef $_ for @{ $self->{'constraints'} };
546 undef $_ for @{ $self->{'indices'} };
547 undef $_ for values %{ $self->{'fields'} };
552 # ----------------------------------------------------------------------
558 Ken Y. Clark E<lt>kclark@cpan.orgE<gt>