discard changes now is forced to use master for replication. changed discard_changes...

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Storage / DBI / Pg.pm

diff --git a/lib/DBIx/Class/Storage/DBI/Pg.pm b/lib/DBIx/Class/Storage/DBI/Pg.pm
index 88d401b..bd28e02 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/Pg.pm
+++ b/lib/DBIx/Class/Storage/DBI/Pg.pm
@@ -3,43 +3,103 @@ package DBIx::Class::Storage::DBI::Pg;
 use strict;
 use warnings;
 
+use DBD::Pg qw(:pg_types);
+
 use base qw/DBIx::Class::Storage::DBI/;
 
 # __PACKAGE__->load_components(qw/PK::Auto/);
 
+# Warn about problematic versions of DBD::Pg
+warn "DBD::Pg 1.49 is strongly recommended"
+  if ($DBD::Pg::VERSION < 1.49);
+
+sub _dbh_last_insert_id {
+  my ($self, $dbh, $seq) = @_;
+  $dbh->last_insert_id(undef, undef, undef, undef, {sequence => $seq});
+}
+
 sub last_insert_id {
-  my ($self, $source) = @_;
-  $self->get_autoinc_seq unless $self->{_autoinc_seq};
-  $self->_dbh->last_insert_id(undef,undef,undef,undef,
-    {sequence=>$self->{_autoinc_seq}});
+  my ($self,$source,$col) = @_;
+  my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
+  $self->throw_exception("could not fetch primary key for " . $source->name . ", could not "
+    . "get autoinc sequence for $col (check that table and column specifications are correct "
+    . "and in the correct case)") unless defined $seq;
+  $self->dbh_do('_dbh_last_insert_id', $seq);
 }
 
-sub get_autoinc_seq {
-  my $self = shift;
-  
-  # return the user-defined sequence if known
-  if ($source->sequence) {
-    return $self->{_autoinc_seq} = $source->sequence;
+sub _dbh_get_autoinc_seq {
+  my ($self, $dbh, $schema, $table, @pri) = @_;
+
+  while (my $col = shift @pri) {
+    my $info = $dbh->column_info(undef,$schema,$table,$col)->fetchrow_hashref;
+    if(defined $info->{COLUMN_DEF} and
+       $info->{COLUMN_DEF} =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/) {
+      my $seq = $1;
+      # may need to strip quotes -- see if this works
+      return $seq =~ /\./ ? $seq : $info->{TABLE_SCHEM} . "." . $seq;
+    }
   }
-  
+  return;
+}
+
+sub get_autoinc_seq {
+  my ($self,$source,$col) = @_;
+    
   my @pri = $source->primary_columns;
-  my $dbh = $self->_dbh;
-  my ($schema,$table) = $source->name =~ /^(.+)\.(.+)$/ ? ($1,$2) : (undef,$sou
-rce->table);
-  while (my $col = shift @pri) {
-    my $info = $dbh->column_info(undef,$schema,$table,$col)->fetchrow_arrayref;
-    if (defined $info->[12] and $info->[12] =~ 
-      /^nextval\('"?([^"']+)"?'::(?:text|regclass)\)/)
-    {
-      $self->{_autoinc_seq} = $1;
-      last;
-    } 
+  my ($schema,$table) = $source->name =~ /^(.+)\.(.+)$/ ? ($1,$2)
+    : (undef,$source->name);
+
+  $self->dbh_do('_dbh_get_autoinc_seq', $schema, $table, @pri);
+}
+
+sub sqlt_type {
+  return 'PostgreSQL';
+}
+
+sub datetime_parser_type { return "DateTime::Format::Pg"; }
+
+sub bind_attribute_by_data_type {
+  my ($self,$data_type) = @_;
+
+  my $bind_attributes = {
+    bytea => { pg_type => DBD::Pg::PG_BYTEA },
+  };
+ 
+  if( defined $bind_attributes->{$data_type} ) {
+    return $bind_attributes->{$data_type};
+  }
+  else {
+    return;
   }
 }
 
+sub _sequence_fetch {
+  my ( $self, $type, $seq ) = @_;
+  my ($id) = $self->dbh->selectrow_array("SELECT nextval('${seq}')");
+  return $id;
+}
+
+sub _svp_begin {
+    my ($self, $name) = @_;
+
+    $self->dbh->pg_savepoint($name);
+}
+
+sub _svp_release {
+    my ($self, $name) = @_;
+
+    $self->dbh->pg_release($name);
+}
+
+sub _svp_rollback {
+    my ($self, $name) = @_;
+
+    $self->dbh->pg_rollback_to($name);
+}
+
 1;
 
-=head1 NAME 
+=head1 NAME
 
 DBIx::Class::Storage::DBI::Pg - Automatic primary key class for PostgreSQL