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package DBIx::Class::Schema::Loader::DBI::mysql;
use strict;
use warnings;
use base 'DBIx::Class::Schema::Loader::DBI';
use Carp::Clan qw/^DBIx::Class/;
use Class::C3;
=head1 NAME
DBIx::Class::Schema::Loader::DBI::mysql - DBIx::Class::Schema::Loader::DBI mysql Implementation.
=head1 SYNOPSIS
package My::Schema;
use base qw/DBIx::Class::Schema::Loader/;
__PACKAGE__->load_from_connection(
relationships => 1,
);
1;
=head1 DESCRIPTION
See L<DBIx::Class::Schema::Loader::Base>.
=cut
sub _table_fk_info {
my ($self, $table) = @_;
my $dbh = $self->schema->storage->dbh;
my $table_def_ref = $dbh->selectrow_arrayref("SHOW CREATE TABLE `$table`")
or croak ("Cannot get table definition for $table");
my $table_def = $table_def_ref->[1] || '';
my (@reldata) = ($table_def =~ /CONSTRAINT `.*` FOREIGN KEY \(`(.*)`\) REFERENCES `(.*)` \(`(.*)`\)/ig);
my @rels;
while (scalar @reldata > 0) {
my $cols = shift @reldata;
my $f_table = shift @reldata;
my $f_cols = shift @reldata;
my @cols = map { s/\Q$self->{_quoter}\E//; lc $_ }
split(/\s*,\s*/, $cols);
my @f_cols = map { s/\Q$self->{_quoter}\E//; lc $_ }
split(/\s*,\s*/, $f_cols);
push(@rels, {
local_columns => \@cols,
remote_columns => \@f_cols,
remote_table => $f_table
});
}
return \@rels;
}
# primary and unique info comes from the same sql statement,
# so cache it here for both routines to use
sub _mysql_table_get_keys {
my ($self, $table) = @_;
if(!exists($self->{_cache}->{_mysql_keys}->{$table})) {
my %keydata;
my $dbh = $self->schema->storage->dbh;
my $sth = $dbh->prepare("SHOW INDEX FROM `$table`");
$sth->execute;
while(my $row = $sth->fetchrow_hashref) {
next if $row->{Non_unique};
push(@{$keydata{$row->{Key_name}}},
[ $row->{Seq_in_index}, lc $row->{Column_name} ]
);
}
foreach my $keyname (keys %keydata) {
my @ordered_cols = map { $_->[1] } sort { $a->[0] <=> $b->[0] }
@{$keydata{$keyname}};
$keydata{$keyname} = \@ordered_cols;
}
$self->{_cache}->{_mysql_keys}->{$table} = \%keydata;
}
return $self->{_cache}->{_mysql_keys}->{$table};
}
sub _table_pk_info {
my ( $self, $table ) = @_;
return $self->_mysql_table_get_keys($table)->{PRIMARY};
}
sub _table_uniq_info {
my ( $self, $table ) = @_;
my @uniqs;
my $keydata = $self->_mysql_table_get_keys($table);
foreach my $keyname (keys %$keydata) {
next if $keyname eq 'PRIMARY';
push(@uniqs, [ $keyname => $keydata->{$keyname} ]);
}
return \@uniqs;
}
=head1 SEE ALSO
L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>,
L<DBIx::Class::Schema::Loader::DBI>
=cut
1;
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