Fix count on rs with a having clause with an aliased condition

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

diff --git a/lib/DBIx/Class/Storage/DBIHacks.pm b/lib/DBIx/Class/Storage/DBIHacks.pm
index 240fa3c..61f8aac 100644 (file)
--- a/lib/DBIx/Class/Storage/DBIHacks.pm
+++ b/lib/DBIx/Class/Storage/DBIHacks.pm
@@ -117,8 +117,15 @@ sub _adjust_select_args_for_complex_prefetch {
 
     # if a multi-type join was needed in the subquery - add a group_by to simulate the
     # collapse in the subq
-    $inner_attrs->{group_by} ||= $inner_select
-      if first { ! $_->[0]{-is_single} } (@{$inner_from}[1 .. $#$inner_from]);
+    if (
+      ! $inner_attrs->{group_by}
+        and
+      first { ! $_->[0]{-is_single} } (@{$inner_from}[1 .. $#$inner_from])
+    ) {
+      $inner_attrs->{group_by} = $self->_group_over_selection (
+        $inner_from, $inner_select, $inner_attrs->{order_by}
+      );
+    }
 
     # we already optimized $inner_from above
     local $self->{_use_join_optimizer} = 0;
@@ -252,7 +259,9 @@ 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} = '';
   }
 
@@ -327,6 +336,39 @@ sub _resolve_aliastypes_from_select_args {
   return $aliases_by_type;
 }
 
+sub _group_over_selection {
+  my ($self, $from, $select, $order_by) = @_;
+
+  my $rs_column_list = $self->_resolve_column_info ($from);
+
+  my (@group_by, %group_index);
+
+  for (@$select) {
+    if (! ref($_) or ref ($_) ne 'HASH' ) {
+      push @group_by, $_;
+      $group_index{$_}++;
+      if ($rs_column_list->{$_} and $_ !~ /\./ ) {
+        # add a fully qualified version as well
+        $group_index{"$rs_column_list->{$_}{-source_alias}.$_"}++;
+      }
+    }
+  }
+
+  # 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)) {
+    # only consider real columns (for functions the user got to do an explicit group_by)
+    my $colinfo = $rs_column_list->{$chunk}
+      or next;
+
+    $chunk = "$colinfo->{-source_alias}.$chunk" if $chunk !~ /\./;
+    push @group_by, $chunk unless $group_index{$chunk}++;
+  }
+
+  return \@group_by;
+}
+
 sub _resolve_ident_sources {
   my ($self, $ident) = @_;
 
@@ -371,7 +413,7 @@ 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)
@@ -388,25 +430,23 @@ 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,
     };
   }