X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBIHacks.pm;h=41ca371b5f7f6edec4425d0f173dec6ce7421860;hb=887a0aefb7a00e6b1ad3265747a1af0d1fd64e5d;hp=f5a03c92a7d1c2afb045dad4e01e932e0111f949;hpb=0a3441ee8e0e747cfa05eff02df0d918ed5d6acb;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBIHacks.pm b/lib/DBIx/Class/Storage/DBIHacks.pm
index f5a03c9..41ca371 100644
--- a/lib/DBIx/Class/Storage/DBIHacks.pm
+++ b/lib/DBIx/Class/Storage/DBIHacks.pm
@@ -115,12 +115,19 @@ sub _adjust_select_args_for_complex_prefetch {
       group_by => ['dummy'], %$inner_attrs,
     });
 
-    # if a multi-type join was needed in the subquery - add a group_by to simulate the
-    # collapse in the subq
+    my $inner_aliastypes =
+      $self->_resolve_aliastypes_from_select_args( $inner_from, $inner_select, $where, $inner_attrs );
+
+    # if a multi-type non-selecting (only restricting) join was needed in the subquery
+    # add a group_by to simulate the collapse in the subq
     if (
       ! $inner_attrs->{group_by}
         and
-      first { ! $_->[0]{-is_single} } (@{$inner_from}[1 .. $#$inner_from])
+      first {
+        $inner_aliastypes->{restricting}{$_}
+          and
+        ! $inner_aliastypes->{selecting}{$_}
+      } ( keys %{$inner_aliastypes->{multiplying}||{}} )
     ) {
       $inner_attrs->{group_by} = $self->_group_over_selection (
         $inner_from, $inner_select, $inner_attrs->{order_by}
@@ -247,7 +254,9 @@ sub _resolve_aliastypes_from_select_args {
   # set up a botched SQLA
   my $sql_maker = $self->sql_maker;
 
-  local $sql_maker->{having_bind};  # these are throw away results
+  # these are throw away results, do not pollute the bind stack
+  local $sql_maker->{having_bind};
+  local $sql_maker->{select_bind};
 
   # we can't scan properly without any quoting (\b doesn't cut it
   # everywhere), so unless there is proper quoting set - use our
@@ -259,7 +268,9 @@ sub _resolve_aliastypes_from_select_args {
   local $sql_maker->{name_sep} = $sql_maker->{name_sep};
 
   unless (defined $sql_maker->{quote_char} and length $sql_maker->{quote_char}) {
-    $sql_maker->{quote_char} = "\x00";
+    $sql_maker->{quote_char} = ["\x00", "\xFF"];
+    # if we don't unset it we screw up retarded but unfortunately working
+    # 'MAX(foo.bar)' => { '>', 3 }
     $sql_maker->{name_sep} = '';
   }
 
@@ -274,8 +285,8 @@ sub _resolve_aliastypes_from_select_args {
       }),
     ],
     selecting => [
-      $self->_extract_order_columns ($attrs->{order_by}, $sql_maker),
       $sql_maker->_recurse_fields ($select),
+      ( map { $_->[0] } $self->_extract_order_criteria ($attrs->{order_by}, $sql_maker) ),
     ],
   };
 
@@ -334,6 +345,7 @@ sub _resolve_aliastypes_from_select_args {
   return $aliases_by_type;
 }
 
+# This is the engine behind { distinct => 1 }
 sub _group_over_selection {
   my ($self, $from, $select, $order_by) = @_;
 
@@ -354,11 +366,12 @@ sub _group_over_selection {
 
   # add any order_by parts that are not already present in the group_by
   # we need to be careful not to add any named functions/aggregates
-  # i.e. select => [ ... { count => 'foo', -as 'foocount' } ... ]
-  for my $chunk ($self->_extract_order_columns($order_by)) {
+  # i.e. order_by => [ ... { count => 'foo' } ... ]
+  for ($self->_extract_order_criteria($order_by)) {
     # only consider real columns (for functions the user got to do an explicit group_by)
-    my $colinfo = $rs_column_list->{$chunk}
-      or next;
+    next if @$_ != 1;
+    my $chunk = $_->[0];
+    my $colinfo = $rs_column_list->{$chunk} or next;
 
     $chunk = "$colinfo->{-source_alias}.$chunk" if $chunk !~ /\./;
     push @group_by, $chunk unless $group_index{$chunk}++;
@@ -411,7 +424,7 @@ sub _resolve_column_info {
   my ($self, $ident, $colnames) = @_;
   my ($alias2src, $root_alias) = $self->_resolve_ident_sources($ident);
 
-  my (%return, %seen_cols, @auto_colnames);
+  my (%seen_cols, @auto_colnames);
 
   # compile a global list of column names, to be able to properly
   # disambiguate unqualified column names (if at all possible)
@@ -428,25 +441,23 @@ sub _resolve_column_info {
     grep { @{$seen_cols{$_}} == 1 } (keys %seen_cols),
   ];
 
-  COLUMN:
+  my (%return, $colinfos);
   foreach my $col (@$colnames) {
-    my ($alias, $colname) = $col =~ m/^ (?: ([^\.]+) \. )? (.+) $/x;
+    my ($source_alias, $colname) = $col =~ m/^ (?: ([^\.]+) \. )? (.+) $/x;
 
-    unless ($alias) {
-      # see if the column was seen exactly once (so we know which rsrc it came from)
-      if ($seen_cols{$colname} and @{$seen_cols{$colname}} == 1) {
-        $alias = $seen_cols{$colname}[0];
-      }
-      else {
-        next COLUMN;
-      }
-    }
+    # if the column was seen exactly once - we know which rsrc it came from
+    $source_alias ||= $seen_cols{$colname}[0]
+      if ($seen_cols{$colname} and @{$seen_cols{$colname}} == 1);
 
-    my $rsrc = $alias2src->{$alias};
-    $return{$col} = $rsrc && {
-      %{$rsrc->column_info($colname)},
+    next unless $source_alias;
+
+    my $rsrc = $alias2src->{$source_alias}
+      or next;
+
+    $return{$col} = {
+      %{ ( $colinfos->{$source_alias} ||= $rsrc->columns_info )->{$colname} },
       -result_source => $rsrc,
-      -source_alias => $alias,
+      -source_alias => $source_alias,
     };
   }
 
@@ -588,7 +599,7 @@ sub _strip_cond_qualifiers {
   return $cond;
 }
 
-sub _extract_order_columns {
+sub _extract_order_criteria {
   my ($self, $order_by, $sql_maker) = @_;
 
   my $parser = sub {
@@ -598,8 +609,9 @@ sub _extract_order_columns {
       unless wantarray;
 
     my @chunks;
-    for my $chunk (map { ref $_ ? @$_ : $_ } ($sql_maker->_order_by_chunks ($order_by) ) ) {
-      $chunk =~ s/\s+ (?: ASC|DESC ) \s* $//ix;
+    for ($sql_maker->_order_by_chunks ($order_by) ) {
+      my $chunk = ref $_ ? $_ : [ $_ ];
+      $chunk->[0] =~ s/\s+ (?: ASC|DESC ) \s* $//ix;
       push @chunks, $chunk;
     }