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package DBIx::Class::Schema::Loader::DBI::SQLite;
use strict;
use warnings;
use base qw/DBIx::Class::Schema::Loader::DBI/;
use Carp::Clan qw/^DBIx::Class/;
use Text::Balanced qw( extract_bracketed );
use Class::C3;
our $VERSION = '0.04005';
=head1 NAME
DBIx::Class::Schema::Loader::DBI::SQLite - DBIx::Class::Schema::Loader::DBI SQLite Implementation.
=head1 SYNOPSIS
package My::Schema;
use base qw/DBIx::Class::Schema::Loader/;
__PACKAGE__->loader_options( debug => 1 );
1;
=head1 DESCRIPTION
See L<DBIx::Class::Schema::Loader::Base>.
=head1 METHODS
=head2 rescan
SQLite will fail all further commands on a connection if the
underlying schema has been modified. Therefore, any runtime
changes requiring C<rescan> also require us to re-connect
to the database. The C<rescan> method here handles that
reconnection for you, but beware that this must occur for
any other open sqlite connections as well.
=cut
sub rescan {
my ($self, $schema) = @_;
$schema->storage->disconnect if $schema->storage;
$self->next::method($schema);
}
# XXX this really needs a re-factor
sub _sqlite_parse_table {
my ($self, $table) = @_;
my @rels;
my @uniqs;
my $dbh = $self->schema->storage->dbh;
my $sth = $self->{_cache}->{sqlite_master}
||= $dbh->prepare(q{SELECT sql FROM sqlite_master WHERE tbl_name = ?});
$sth->execute($table);
my ($sql) = $sth->fetchrow_array;
$sth->finish;
# Cut "CREATE TABLE ( )" blabla...
$sql =~ /^[\w\s']+\((.*)\)$/si;
my $cols = $1;
# strip single-line comments
$cols =~ s/\-\-.*\n/\n/g;
# temporarily replace any commas inside parens,
# so we don't incorrectly split on them below
my $cols_no_bracketed_commas = $cols;
while ( my $extracted =
( extract_bracketed( $cols, "()", "[^(]*" ) )[0] )
{
my $replacement = $extracted;
$replacement =~ s/,/--comma--/g;
$replacement =~ s/^\(//;
$replacement =~ s/\)$//;
$cols_no_bracketed_commas =~ s/$extracted/$replacement/m;
}
# Split column definitions
for my $col ( split /,/, $cols_no_bracketed_commas ) {
# put the paren-bracketed commas back, to help
# find multi-col fks below
$col =~ s/\-\-comma\-\-/,/g;
$col =~ s/^\s*FOREIGN\s+KEY\s*//i;
# Strip punctuations around key and table names
$col =~ s/[\[\]'"]/ /g;
$col =~ s/^\s+//gs;
# Grab reference
chomp $col;
if($col =~ /^(.*)\s+UNIQUE/i) {
my $colname = $1;
$colname =~ s/\s+.*$//;
push(@uniqs, [ "${colname}_unique" => [ lc $colname ] ]);
}
elsif($col =~/^\s*UNIQUE\s*\(\s*(.*)\)/i) {
my $cols = $1;
$cols =~ s/\s+$//;
my @cols = map { lc } split(/\s*,\s*/, $cols);
my $name = join(q{_}, @cols) . '_unique';
push(@uniqs, [ $name => \@cols ]);
}
next if $col !~ /^(.*\S)\s+REFERENCES\s+(\w+) (?: \s* \( (.*) \) )? /ix;
my ($cols, $f_table, $f_cols) = ($1, $2, $3);
if($cols =~ /^\(/) { # Table-level
$cols =~ s/^\(\s*//;
$cols =~ s/\s*\)$//;
}
else { # Inline
$cols =~ s/\s+.*$//;
}
my @cols = map { s/\s*//g; lc $_ } split(/\s*,\s*/,$cols);
my $rcols;
if($f_cols) {
my @f_cols = map { s/\s*//g; lc $_ } split(/\s*,\s*/,$f_cols);
croak "Mismatched column count in rel for $table => $f_table"
if @cols != @f_cols;
$rcols = \@f_cols;
}
push(@rels, {
local_columns => \@cols,
remote_columns => $rcols,
remote_table => $f_table,
});
}
return { rels => \@rels, uniqs => \@uniqs };
}
sub _table_fk_info {
my ($self, $table) = @_;
$self->{_sqlite_parse_data}->{$table} ||=
$self->_sqlite_parse_table($table);
return $self->{_sqlite_parse_data}->{$table}->{rels};
}
sub _table_uniq_info {
my ($self, $table) = @_;
$self->{_sqlite_parse_data}->{$table} ||=
$self->_sqlite_parse_table($table);
return $self->{_sqlite_parse_data}->{$table}->{uniqs};
}
sub _tables_list {
my $self = shift;
my $dbh = $self->schema->storage->dbh;
my $sth = $dbh->prepare("SELECT * FROM sqlite_master");
$sth->execute;
my @tables;
while ( my $row = $sth->fetchrow_hashref ) {
next unless lc( $row->{type} ) eq 'table';
next if $row->{tbl_name} =~ /^sqlite_/;
push @tables, $row->{tbl_name};
}
$sth->finish;
return @tables;
}
=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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