package SQL::Translator::Schema::Table;
# ----------------------------------------------------------------------
-# $Id: Table.pm,v 1.28 2004-11-05 13:19:31 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
use base 'SQL::Translator::Schema::Object';
-use vars qw( $VERSION $FIELD_ORDER );
-
-$VERSION = sprintf "%d.%02d", q$Revision: 1.28 $ =~ /(\d+)\.(\d+)/;
+use vars qw( $VERSION );
+$VERSION = '1.59';
# Stringify to our name, being careful not to pass any args through so we don't
# accidentally set it to undef. We also have to tweak bool so the object is
Object constructor.
- my $table = SQL::Translator::Schema::Table->new(
+ my $table = SQL::Translator::Schema::Table->new(
schema => $schema,
name => 'foo',
);
=cut
+sub new {
+ my $class = shift;
+ my $self = $class->SUPER::new (@_)
+ or return;
+
+ $self->{_order} = { map { $_ => 0 } qw/
+ field
+ /};
+
+ return $self;
+}
+
+
+
# ----------------------------------------------------------------------
sub add_constraint {
=head2 add_constraint
-Add a constraint to the table. Returns the newly created
+Add a constraint to the table. Returns the newly created
C<SQL::Translator::Schema::Constraint> object.
my $c1 = $table->add_constraint(
else {
my %args = @_;
$args{'table'} = $self;
- $constraint = $constraint_class->new( \%args ) or
- return $self->error( $constraint_class->error );
+ $constraint = $constraint_class->new( \%args ) or
+ return $self->error( $constraint_class->error );
}
#
my $pk = $self->primary_key;
if ( $pk && $constraint->type eq PRIMARY_KEY ) {
$self->primary_key( $constraint->fields );
+ $pk->name($constraint->name) if $constraint->name;
+ my %extra = $constraint->extra;
+ $pk->extra(%extra) if keys %extra;
$constraint = $pk;
$ok = 0;
}
}
}
#
- # See if another constraint of the same type
+ # See if another constraint of the same type
# covers the same fields. -- This doesn't work! ky
#
# elsif ( $constraint->type ne CHECK_C ) {
# my @field_names = $constraint->fields;
-# for my $c (
-# grep { $_->type eq $constraint->type }
-# $self->get_constraints
+# for my $c (
+# grep { $_->type eq $constraint->type }
+# $self->get_constraints
# ) {
# my %fields = map { $_, 1 } $c->fields;
# for my $field_name ( @field_names ) {
# if ( $fields{ $field_name } ) {
# $constraint = $c;
-# $ok = 0;
+# $ok = 0;
# last;
# }
# }
}
# ----------------------------------------------------------------------
+sub drop_constraint {
+
+=pod
+
+=head2 drop_constraint
+
+Remove a constraint from the table. Returns the constraint object if the index
+was found and removed, an error otherwise. The single parameter can be either
+an index name or an C<SQL::Translator::Schema::Constraint> object.
+
+ $table->drop_constraint('myconstraint');
+
+=cut
+
+ my $self = shift;
+ my $constraint_class = 'SQL::Translator::Schema::Constraint';
+ my $constraint_name;
+
+ if ( UNIVERSAL::isa( $_[0], $constraint_class ) ) {
+ $constraint_name = shift->name;
+ }
+ else {
+ $constraint_name = shift;
+ }
+
+ if ( ! grep { $_->name eq $constraint_name } @ { $self->{'constraints'} } ) {
+ return $self->error(qq[Can't drop constraint: "$constraint_name" doesn't exist]);
+ }
+
+ my @cs = @{ $self->{'constraints'} };
+ my ($constraint_id) = grep { $cs[$_]->name eq $constraint_name } (0..$#cs);
+ my $constraint = splice(@{$self->{'constraints'}}, $constraint_id, 1);
+
+ return $constraint;
+}
+
+# ----------------------------------------------------------------------
sub add_index {
=pod
else {
my %args = @_;
$args{'table'} = $self;
- $index = $index_class->new( \%args ) or return
+ $index = $index_class->new( \%args ) or return
$self->error( $index_class->error );
}
-
+ foreach my $ex_index ($self->get_indices) {
+ return if ($ex_index->equals($index));
+ }
push @{ $self->{'indices'} }, $index;
return $index;
}
# ----------------------------------------------------------------------
+sub drop_index {
+
+=pod
+
+=head2 drop_index
+
+Remove an index from the table. Returns the index object if the index was
+found and removed, an error otherwise. The single parameter can be either
+an index name of an C<SQL::Translator::Schema::Index> object.
+
+ $table->drop_index('myindex');
+
+=cut
+
+ my $self = shift;
+ my $index_class = 'SQL::Translator::Schema::Index';
+ my $index_name;
+
+ if ( UNIVERSAL::isa( $_[0], $index_class ) ) {
+ $index_name = shift->name;
+ }
+ else {
+ $index_name = shift;
+ }
+
+ if ( ! grep { $_->name eq $index_name } @{ $self->{'indices'} }) {
+ return $self->error(qq[Can't drop index: "$index_name" doesn't exist]);
+ }
+
+ my @is = @{ $self->{'indices'} };
+ my ($index_id) = grep { $is[$_]->name eq $index_name } (0..$#is);
+ my $index = splice(@{$self->{'indices'}}, $index_id, 1);
+
+ return $index;
+}
+
+# ----------------------------------------------------------------------
sub add_field {
=pod
=head2 add_field
Add an field to the table. Returns the newly created
-C<SQL::Translator::Schema::Field> object. The "name" parameter is
-required. If you try to create a field with the same name as an
+C<SQL::Translator::Schema::Field> object. The "name" parameter is
+required. If you try to create a field with the same name as an
existing field, you will get an error and the field will not be created.
my $f1 = $table->add_field(
size => 11,
);
- my $f2 = SQL::Translator::Schema::Field->new(
- name => 'name',
+ my $f2 = SQL::Translator::Schema::Field->new(
+ name => 'name',
table => $table,
);
$f2 = $table->add_field( $field2 ) or die $table->error;
else {
my %args = @_;
$args{'table'} = $self;
- $field = $field_class->new( \%args ) or return
+ $field = $field_class->new( \%args ) or return
$self->error( $field_class->error );
}
- $field->order( ++$FIELD_ORDER );
+ $field->order( ++$self->{_order}{field} );
# We know we have a name as the Field->new above errors if none given.
my $field_name = $field->name;
- if ( exists $self->{'fields'}{ $field_name } ) {
+ if ( exists $self->{'fields'}{ $field_name } ) {
return $self->error(qq[Can't create field: "$field_name" exists]);
}
else {
return $field;
}
+# ----------------------------------------------------------------------
+sub drop_field {
+
+=pod
+
+=head2 drop_field
+
+Remove a field from the table. Returns the field object if the field was
+found and removed, an error otherwise. The single parameter can be either
+a field name or an C<SQL::Translator::Schema::Field> object.
+
+ $table->drop_field('myfield');
+
+=cut
+
+ my $self = shift;
+ my $field_class = 'SQL::Translator::Schema::Field';
+ my $field_name;
+
+ if ( UNIVERSAL::isa( $_[0], $field_class ) ) {
+ $field_name = shift->name;
+ }
+ else {
+ $field_name = shift;
+ }
+ my %args = @_;
+ my $cascade = $args{'cascade'};
+
+ if ( ! exists $self->{'fields'}{ $field_name } ) {
+ return $self->error(qq[Can't drop field: "$field_name" doesn't exists]);
+ }
+
+ my $field = delete $self->{'fields'}{ $field_name };
+
+ if ( $cascade ) {
+ # Remove this field from all indices using it
+ foreach my $i ($self->get_indices()) {
+ my @fs = $i->fields();
+ @fs = grep { $_ ne $field->name } @fs;
+ $i->fields(@fs);
+ }
+
+ # Remove this field from all constraints using it
+ foreach my $c ($self->get_constraints()) {
+ my @cs = $c->fields();
+ @cs = grep { $_ ne $field->name } @cs;
+ $c->fields(@cs);
+ }
+ }
+
+ return $field;
+}
# ----------------------------------------------------------------------
sub comments {
=head2 comments
-Get or set the comments on a table. May be called several times to
+Get or set the comments on a table. May be called several times to
set and it will accumulate the comments. Called in an array context,
returns each comment individually; called in a scalar context, returns
all the comments joined on newlines.
}
if ( @{ $self->{'comments'} || [] } ) {
- return wantarray
+ return wantarray
? @{ $self->{'comments'} }
: join( "\n", @{ $self->{'comments'} } )
;
- }
+ }
else {
return wantarray ? () : undef;
}
my $self = shift;
if ( ref $self->{'constraints'} ) {
- return wantarray
+ return wantarray
? @{ $self->{'constraints'} } : $self->{'constraints'};
}
else {
my $self = shift;
if ( ref $self->{'indices'} ) {
- return wantarray
- ? @{ $self->{'indices'} }
+ return wantarray
+ ? @{ $self->{'indices'} }
: $self->{'indices'};
}
else {
my $self = shift;
my $field_name = shift or return $self->error('No field name');
+ my $case_insensitive = shift;
+ if ( $case_insensitive ) {
+ $field_name = uc($field_name);
+ foreach my $field ( keys %{$self->{fields}} ) {
+ return $self->{fields}{$field} if $field_name eq uc($field);
+ }
+ return $self->error(qq[Field "$field_name" does not exist]);
+ }
return $self->error( qq[Field "$field_name" does not exist] ) unless
exists $self->{'fields'}{ $field_name };
return $self->{'fields'}{ $field_name };
=cut
my $self = shift;
- my @fields =
+ my @fields =
map { $_->[1] }
sort { $a->[0] <=> $b->[0] }
map { [ $_->order, $_ ] }
return $self->error('No name') unless $self->name;
return $self->error('No fields') unless $self->get_fields;
- for my $object (
- $self->get_fields, $self->get_indices, $self->get_constraints
+ for my $object (
+ $self->get_fields, $self->get_indices, $self->get_constraints
) {
return $object->error unless $object->is_valid;
}
my %fk = ();
foreach my $field ( $self->get_fields ) {
- next unless $field->is_foreign_key;
- $fk{$field->foreign_key_reference->reference_table}++;
- }
+ next unless $field->is_foreign_key;
+ $fk{$field->foreign_key_reference->reference_table}++;
+ }
foreach my $referenced (keys %fk){
- if($fk{$referenced} > 1){
- $self->{'is_trivial_link'} = 0;
- last;
- }
+ if($fk{$referenced} > 1){
+ $self->{'is_trivial_link'} = 0;
+ last;
+ }
}
return $self->{'is_trivial_link'};
$self->{'can_link'}{ $table1->name }{ $table2->name } =
[ 'one2one', $fk{ $table2->name }, $fk{ $table1->name } ];
- # non-trivial traversal. one way to link table2,
+ # non-trivial traversal. one way to link table2,
# many ways to link table1
}
elsif ( scalar( @{ $fk{ $table1->name } } > 1 )
$self->{'can_link'}{ $table2->name }{ $table1->name } =
[ 'one2many', $fk{ $table2->name }, $fk{ $table1->name } ];
- # non-trivial traversal. one way to link table1,
+ # non-trivial traversal. one way to link table1,
# many ways to link table2
}
elsif ( scalar( @{ $fk{ $table1->name } } == 1 )
$self->{'can_link'}{ $table2->name }{ $table1->name } =
[ 'many2many', $fk{ $table2->name }, $fk{ $table1->name } ];
- # one of the tables didn't export a key
+ # one of the tables didn't export a key
# to this table, no linking possible
}
else {
my $constraint;
if ( @$fields ) {
for my $f ( @$fields ) {
- return $self->error(qq[Invalid field "$f"]) unless
+ return $self->error(qq[Invalid field "$f"]) unless
$self->get_field($f);
}
$has_pk = 1;
$c->fields( @{ $c->fields }, @$fields );
$constraint = $c;
- }
+ }
}
unless ( $has_pk ) {
push @{ $self->{'options'} }, @$options;
if ( ref $self->{'options'} ) {
- return wantarray ? @{ $self->{'options'} || [] } : $self->{'options'};
+ return wantarray ? @{ $self->{'options'} || [] } : ($self->{'options'} || '');
}
else {
return wantarray ? () : [];
=head2 field_names
Read-only method to return a list or array ref of the field names. Returns undef
-or an empty list if the table has no fields set. Usefull if you want to
+or an empty list if the table has no fields set. Useful if you want to
avoid the overload magic of the Field objects returned by the get_fields method.
my @names = $constraint->field_names;
=cut
my $self = shift;
- my @fields =
+ my @fields =
map { $_->name }
sort { $a->order <=> $b->order }
values %{ $self->{'fields'} || {} };
}
# ----------------------------------------------------------------------
+sub equals {
+
+=pod
+
+=head2 equals
+
+Determines if this table is the same as another
+
+ my $isIdentical = $table1->equals( $table2 );
+
+=cut
+
+ my $self = shift;
+ my $other = shift;
+ my $case_insensitive = shift;
+
+ return 0 unless $self->SUPER::equals($other);
+ return 0 unless $case_insensitive ? uc($self->name) eq uc($other->name) : $self->name eq $other->name;
+ return 0 unless $self->_compare_objects(scalar $self->options, scalar $other->options);
+ return 0 unless $self->_compare_objects(scalar $self->extra, scalar $other->extra);
+
+ # Fields
+ # Go through our fields
+ my %checkedFields;
+ foreach my $field ( $self->get_fields ) {
+ my $otherField = $other->get_field($field->name, $case_insensitive);
+ return 0 unless $field->equals($otherField, $case_insensitive);
+ $checkedFields{$field->name} = 1;
+ }
+ # Go through the other table's fields
+ foreach my $otherField ( $other->get_fields ) {
+ next if $checkedFields{$otherField->name};
+ return 0;
+ }
+
+ # Constraints
+ # Go through our constraints
+ my %checkedConstraints;
+CONSTRAINT:
+ foreach my $constraint ( $self->get_constraints ) {
+ foreach my $otherConstraint ( $other->get_constraints ) {
+ if ( $constraint->equals($otherConstraint, $case_insensitive) ) {
+ $checkedConstraints{$otherConstraint} = 1;
+ next CONSTRAINT;
+ }
+ }
+ return 0;
+ }
+ # Go through the other table's constraints
+CONSTRAINT2:
+ foreach my $otherConstraint ( $other->get_constraints ) {
+ next if $checkedFields{$otherConstraint};
+ foreach my $constraint ( $self->get_constraints ) {
+ if ( $otherConstraint->equals($constraint, $case_insensitive) ) {
+ next CONSTRAINT2;
+ }
+ }
+ return 0;
+ }
+
+ # Indices
+ # Go through our indices
+ my %checkedIndices;
+INDEX:
+ foreach my $index ( $self->get_indices ) {
+ foreach my $otherIndex ( $other->get_indices ) {
+ if ( $index->equals($otherIndex, $case_insensitive) ) {
+ $checkedIndices{$otherIndex} = 1;
+ next INDEX;
+ }
+ }
+ return 0;
+ }
+ # Go through the other table's indices
+INDEX2:
+ foreach my $otherIndex ( $other->get_indices ) {
+ next if $checkedIndices{$otherIndex};
+ foreach my $index ( $self->get_indices ) {
+ if ( $otherIndex->equals($index, $case_insensitive) ) {
+ next INDEX2;
+ }
+ }
+ return 0;
+ }
+
+ return 1;
+}
+
+# ----------------------------------------------------------------------
=head1 LOOKUP METHODS
-The following are a set of shortcut methods for getting commonly used lists of
-fields and constraints. They all return lists or array refs of Field or
+The following are a set of shortcut methods for getting commonly used lists of
+fields and constraints. They all return lists or array refs of Field or
Constraint objects.
=over 4
=head1 AUTHORS
-Ken Y. Clark E<lt>kclark@cpan.orgE<gt>,
+Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>,
Allen Day E<lt>allenday@ucla.eduE<gt>.
=cut
projects / dbsrgits/SQL-Translator.git / blobdiff