merge resultset branch through revision 378

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

diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm
index 33b3e1d..7e41fb2 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI.pm
+++ b/lib/DBIx/Class/Storage/DBI.pm
@@ -6,6 +6,79 @@ use DBI;
 use SQL::Abstract::Limit;
 use DBIx::Class::Storage::DBI::Cursor;
 
+BEGIN {
+
+package DBIC::SQL::Abstract; # Temporary. Merge upstream.
+
+use base qw/SQL::Abstract::Limit/;
+
+sub _table {
+  my ($self, $from) = @_;
+  if (ref $from eq 'ARRAY') {
+    return $self->_recurse_from(@$from);
+  } elsif (ref $from eq 'HASH') {
+    return $self->_make_as($from);
+  } else {
+    return $from;
+  }
+}
+
+sub _recurse_from {
+  my ($self, $from, @join) = @_;
+  my @sqlf;
+  push(@sqlf, $self->_make_as($from));
+  foreach my $j (@join) {
+    my ($to, $on) = @$j;
+
+       # check whether a join type exists
+       my $join_clause = '';
+       if (ref($to) eq 'HASH' and exists($to->{-join_type})) {
+               $join_clause = ' '.uc($to->{-join_type}).' JOIN ';
+       } else {
+               $join_clause = ' JOIN ';
+       }
+    push(@sqlf, $join_clause);
+
+    if (ref $to eq 'ARRAY') {
+      push(@sqlf, '(', $self->_recurse_from(@$to), ')');
+    } else {
+      push(@sqlf, $self->_make_as($to));
+    }
+    push(@sqlf, ' ON ', $self->_join_condition($on));
+  }
+  return join('', @sqlf);
+}
+
+sub _make_as {
+  my ($self, $from) = @_;
+       return join(' ', map { $self->_quote($_) }
+                           reverse each %{$self->_skip_options($from)});
+}
+
+sub _skip_options {
+       my ($self, $hash) = @_;
+       my $clean_hash = {};
+       $clean_hash->{$_} = $hash->{$_}
+               for grep {!/^-/} keys %$hash;
+       return $clean_hash;
+}
+
+sub _join_condition {
+  my ($self, $cond) = @_;
+  die "no chance" unless ref $cond eq 'HASH';
+  my %j;
+  for (keys %$cond) { my $x = '= '.$self->_quote($cond->{$_}); $j{$_} = \$x; };
+  return $self->_recurse_where(\%j);
+}
+
+sub _quote {
+  my ($self, $label) = @_;
+  return '' unless defined $label;
+  return $self->SUPER::_quote($label);
+}
+
+} # End of BEGIN block
+
 use base qw/DBIx::Class/;
 
 __PACKAGE__->load_components(qw/Exception AccessorGroup/);
@@ -13,6 +86,8 @@ __PACKAGE__->load_components(qw/Exception AccessorGroup/);
 __PACKAGE__->mk_group_accessors('simple' =>
   qw/connect_info _dbh _sql_maker debug cursor/);
 
+our $TRANSACTION = 0;
+
 sub new {
   my $new = bless({}, ref $_[0] || $_[0]);
   $new->cursor("DBIx::Class::Storage::DBI::Cursor");
@@ -20,16 +95,6 @@ sub new {
   return $new;
 }
 
-sub get_simple {
-  my ($self, $get) = @_;
-  return $self->{$get};
-}
-
-sub set_simple {
-  my ($self, $set, $val) = @_;
-  return $self->{$set} = $val;
-}
-
 =head1 NAME 
 
 DBIx::Class::Storage::DBI - DBI storage handler
@@ -42,8 +107,6 @@ This class represents the connection to the database
 
 =head1 METHODS
 
-=over 4
-
 =cut
 
 sub dbh {
@@ -58,7 +121,7 @@ sub dbh {
 sub sql_maker {
   my ($self) = @_;
   unless ($self->_sql_maker) {
-    $self->_sql_maker(new SQL::Abstract::Limit( limit_dialect => $self->dbh ));
+    $self->_sql_maker(new DBIC::SQL::Abstract( limit_dialect => $self->dbh ));
   }
   return $self->_sql_maker;
 }
@@ -74,32 +137,52 @@ sub _connect {
   return DBI->connect(@info);
 }
 
-=item commit
-
-  $class->commit;
+=head2 txn_begin
 
-Issues a commit again the current dbh
+Calls begin_work on the current dbh.
 
 =cut
 
-sub commit { $_[0]->dbh->commit; }
+sub txn_begin {
+  $_[0]->dbh->begin_work if $TRANSACTION++ == 0 and $_[0]->dbh->{AutoCommit};
+}
 
-=item rollback
+=head2 txn_commit
 
-  $class->rollback;
+Issues a commit against the current dbh.
 
-Issues a rollback again the current dbh
+=cut
+
+sub txn_commit {
+  if ($TRANSACTION == 0) {
+    $_[0]->dbh->commit;
+  }
+  else {
+    $_[0]->dbh->commit if --$TRANSACTION == 0;    
+  }
+}
+
+=head2 txn_rollback
+
+Issues a rollback against the current dbh.
 
 =cut
 
-sub rollback { $_[0]->dbh->rollback; }
+sub txn_rollback {
+  if ($TRANSACTION == 0) {
+    $_[0]->dbh->rollback;
+  }
+  else {
+    --$TRANSACTION == 0 ? $_[0]->dbh->rollback : die $@;    
+  }
+}
 
 sub _execute {
   my ($self, $op, $extra_bind, $ident, @args) = @_;
   my ($sql, @bind) = $self->sql_maker->$op($ident, @args);
   unshift(@bind, @$extra_bind) if $extra_bind;
   warn "$sql: @bind" if $self->debug;
-  my $sth = $self->sth($sql);
+  my $sth = $self->sth($sql,$op);
   @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args
   my $rv = $sth->execute(@bind);
   return (wantarray ? ($rv, $sth, @bind) : $rv);
@@ -126,7 +209,6 @@ sub _select {
   if (ref $condition eq 'SCALAR') {
     $order = $1 if $$condition =~ s/ORDER BY (.*)$//i;
   }
-  $ident = $self->_build_from($ident) if ref $ident;
   my @args = ('select', $attrs->{bind}, $ident, $select, $condition, $order);
   if ($attrs->{software_limit} ||
       $self->sql_maker->_default_limit_syntax eq "GenericSubQ") {
@@ -151,13 +233,13 @@ sub select_single {
 }
 
 sub sth {
-  shift->dbh->prepare(@_);
+  my ($self, $sql, $op) = @_;
+  my $meth = (defined $op && $op ne 'select' ? 'prepare_cached' : 'prepare');
+  return $self->dbh->$meth($sql);
 }
 
 1;
 
-=back
-
 =head1 AUTHORS
 
 Matt S. Trout <mst@shadowcatsystems.co.uk>