Do not artificially order the internals of a has_many prefetch subquery

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / ResultSet.pm

diff --git a/lib/DBIx/Class/ResultSet.pm b/lib/DBIx/Class/ResultSet.pm
index d4c271a..2f76830 100644 (file)
--- a/lib/DBIx/Class/ResultSet.pm
+++ b/lib/DBIx/Class/ResultSet.pm
@@ -1739,14 +1739,19 @@ sub _rs_update_delete {
   # simplify the joinmap and maybe decide if a grouping (and thus subquery) is necessary
   my $relation_classifications;
   if (ref($attrs->{from}) eq 'ARRAY') {
-    $attrs->{from} = $storage->_prune_unused_joins ($attrs->{from}, $attrs->{select}, $cond, $attrs);
-
-    $relation_classifications = $storage->_resolve_aliastypes_from_select_args (
-      [ @{$attrs->{from}}[1 .. $#{$attrs->{from}}] ],
-      $attrs->{select},
-      $cond,
-      $attrs
-    ) unless $needs_group_by_subq;  # we already know we need a group, no point of resolving them
+    if (@{$attrs->{from}} == 1) {
+      # not a fucking JOIN at all, quit with the dickery
+      $relation_classifications = {};
+    } else {
+      $attrs->{from} = $storage->_prune_unused_joins ($attrs->{from}, $attrs->{select}, $cond, $attrs);
+
+      $relation_classifications = $storage->_resolve_aliastypes_from_select_args (
+        [ @{$attrs->{from}}[1 .. $#{$attrs->{from}}] ],
+        $attrs->{select},
+        $cond,
+        $attrs
+      ) unless $needs_group_by_subq;  # we already know we need a group, no point of resolving them
+    }
   }
   else {
     $needs_group_by_subq ||= 1; # if {from} is unparseable assume the worst
@@ -1764,21 +1769,13 @@ sub _rs_update_delete {
   ) {
     # Most databases do not allow aliasing of tables in UPDATE/DELETE. Thus
     # a condition containing 'me' or other table prefixes will not work
-    # at all. What this code tries to do (badly) is to generate a condition
-    # with the qualifiers removed, by exploiting the quote mechanism of sqla
-    #
-    # this is atrocious and should be replaced by normal sqla introspection
-    # one sunny day
-    my ($sql, @bind) = do {
-      my $sqla = $rsrc->storage->sql_maker;
-      local $sqla->{_dequalify_idents} = 1;
-      $sqla->_recurse_where($self->{cond});
-    } if $self->{cond};
-
+    # at all. Tell SQLMaker to dequalify idents via a gross hack.
+    my $sqla = $rsrc->storage->sql_maker;
+    local $sqla->{_dequalify_idents} = 1;
     return $rsrc->storage->$op(
       $rsrc,
       $op eq 'update' ? $values : (),
-      $self->{cond} ? \[$sql, @bind] : (),
+      $self->{cond},
     );
   }
 
@@ -3490,6 +3487,7 @@ sub _resolved_attrs {
     # default order for collapsing unless the user asked for something
     $attrs->{order_by} = [ map { "$alias.$_" } $source->primary_columns ];
     $attrs->{_ordered_for_collapse} = 1;
+    $attrs->{_order_is_artificial} = 1;
   }
 
   # if both page and offset are specified, produce a combined offset