X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FResultSetColumn.pm;h=430e35b4efbfc91621dd2f9f8c83fbbfbdc6fbc1;hb=69cd8a7fcceed892f3bbd6cfba5804776033a85b;hp=ee1ed04b480b5a2b05056b64d91ab9817a4d744c;hpb=4e55c3ae65c1a0c1ef55043fb44bff52d1a1c5a1;p=dbsrgits%2FDBIx-Class-Historic.git

diff --git a/lib/DBIx/Class/ResultSetColumn.pm b/lib/DBIx/Class/ResultSetColumn.pm
index ee1ed04..430e35b 100644
--- a/lib/DBIx/Class/ResultSetColumn.pm
+++ b/lib/DBIx/Class/ResultSetColumn.pm
@@ -1,7 +1,12 @@
 package DBIx::Class::ResultSetColumn;
+
 use strict;
 use warnings;
+
 use base 'DBIx::Class';
+
+use Carp::Clan qw/^DBIx::Class/;
+use DBIx::Class::Exception;
 use List::Util;
 
 =head1 NAME
@@ -61,7 +66,7 @@ sub new {
   my $select = defined $as_index ? $select_list->[$as_index] : $column;
 
   # {collapse} would mean a has_many join was injected, which in turn means
-  # we need to group IF WE CAN (only if the column in question is unique)
+  # we need to group *IF WE CAN* (only if the column in question is unique)
   if (!$new_attrs->{group_by} && keys %{$orig_attrs->{collapse}}) {
 
     # scan for a constraint that would contain our column only - that'd be proof
@@ -76,9 +81,17 @@ sub new {
 
       if ($col eq $select or $fqcol eq $select) {
         $new_attrs->{group_by} = [ $select ];
+        delete $new_attrs->{distinct}; # it is ignored when group_by is present
         last;
       }
     }
+
+    if (!$new_attrs->{group_by}) {
+      carp (
+          "Attempting to retrieve non-unique column '$column' on a resultset containing "
+        . 'one-to-many joins will return duplicate results.'
+      );
+    }
   }
 
   my $new = bless { _select => $select, _as => $column, _parent_resultset => $new_parent_rs }, $class;
@@ -414,10 +427,12 @@ See L<DBIx::Class::Schema/throw_exception> for details.
 
 sub throw_exception {
   my $self=shift;
+
   if (ref $self && $self->{_parent_resultset}) {
-    $self->{_parent_resultset}->throw_exception(@_)
-  } else {
-    croak(@_);
+    $self->{_parent_resultset}->throw_exception(@_);
+  }
+  else {
+    DBIx::Class::Exception->throw(@_);
   }
 }