X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FRelationship%2FHasOne.pm;h=432c10e6f5eda7fd4440d0ad03cddb144c649972;hb=19feb86bd0beb518ffb5bcbfe3cf37d2cc9c1c21;hp=584ed2a272b55c362270ccefb4fe39004427ef55;hpb=36e58b241cab56b1c2daaf51ad0219f2129c638c;p=dbsrgits%2FDBIx-Class-Historic.git

diff --git a/lib/DBIx/Class/Relationship/HasOne.pm b/lib/DBIx/Class/Relationship/HasOne.pm
index 584ed2a..432c10e 100644
--- a/lib/DBIx/Class/Relationship/HasOne.pm
+++ b/lib/DBIx/Class/Relationship/HasOne.pm
@@ -14,20 +14,31 @@ sub has_one {
 sub _has_one {
   my ($class, $join_type, $rel, $f_class, $cond, $attrs) = @_;
   eval "require $f_class";
+  if ($@) {
+    $class->throw($@) unless $@ =~ /Can't locate/;
+  }
+
   unless (ref $cond) {
-    my ($pri, $too_many) = keys %{ $class->_primaries };
+    my ($pri, $too_many) = $class->primary_columns;
     $class->throw( "might_have/has_one can only infer join for a single primary key; ${class} has more" )
       if $too_many;
     my $f_key;
-    if ($cond) {
+    my $f_class_loaded = eval { $f_class->columns };
+    my $guess;
+    if (defined $cond && length $cond) {
       $f_key = $cond;
-    } elsif ($f_class->_columns->{$rel}) {
+      $guess = "caller specified foreign key '$f_key'";
+    } elsif ($f_class_loaded && $f_class->has_column($rel)) {
       $f_key = $rel;
+      $guess = "using given relationship '$rel' for foreign key";
     } else {
-      ($f_key, $too_many) = keys %{ $f_class->_primaries };
+      ($f_key, $too_many) = $f_class->primary_columns;
       $class->throw( "might_have/has_one can only infer join for a single primary key; ${f_class} has more" )
         if $too_many;
+      $guess = "using primary key of foreign class for foreign key";
     }
+    $class->throw("No such column ${f_key} on foreign class ${f_class} ($guess)")
+      if $f_class_loaded && !$f_class->has_column($f_key);
     $cond = { "foreign.${f_key}" => "self.${pri}" };
   }
   $class->add_relationship($rel, $f_class,