Switch reverse_relationship_info() to the relcond resolver

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / ResultSource / RowParser.pm

diff --git a/lib/DBIx/Class/ResultSource/RowParser.pm b/lib/DBIx/Class/ResultSource/RowParser.pm
index efd67b1..069d331 100644 (file)
--- a/lib/DBIx/Class/ResultSource/RowParser.pm
+++ b/lib/DBIx/Class/ResultSource/RowParser.pm
@@ -5,15 +5,12 @@ use strict;
 use warnings;
 
 use base 'DBIx::Class';
-use mro 'c3';
-
-use Try::Tiny;
-use List::Util 'max';
 
 use DBIx::Class::ResultSource::RowParser::Util qw(
   assemble_simple_parser
   assemble_collapsing_parser
 );
+use DBIx::Class::_Util 'DUMMY_ALIASPAIR';
 
 use DBIx::Class::Carp;
 
@@ -192,8 +189,10 @@ sub _resolve_collapse {
       rsrc => $self->related_source($rel),
       fk_map => $self->_resolve_relationship_condition(
         rel_name => $rel,
-        self_alias => "\xFE", # irrelevant
-        foreign_alias => "\xFF", # irrelevant
+
+        # an API where these are optional would be too cumbersome,
+        # instead always pass in some dummy values
+        DUMMY_ALIASPAIR,
       )->{identity_map},
     };
   }
@@ -405,7 +404,14 @@ sub _resolve_collapse {
       # coderef later
       $collapse_map->{-identifying_columns} = [];
       $collapse_map->{-identifying_columns_variants} = [ sort {
-        (scalar @$a) <=> (scalar @$b) or max(@$a) <=> max(@$b)
+        (scalar @$a) <=> (scalar @$b)
+          or
+        (
+          # Poor man's max()
+          ( sort { $b <=> $a } @$a )[0]
+            <=>
+          ( sort { $b <=> $a } @$b )[0]
+        )
       } @collapse_sets ];
     }
   }
@@ -451,12 +457,15 @@ sub _resolve_collapse {
 
         is_single => $relinfo->{$rel}{is_single},
 
-        # if there is at least one *inner* reverse relationship which is HASH-based (equality only)
+        # if there is at least one *inner* reverse relationship ( meaning identity-only )
         # we can safely assume that the child can not exist without us
-        rev_rel_is_optional => ( grep
-          { ref $_->{cond} eq 'HASH' and ($_->{attrs}{join_type}||'') !~ /^left/i }
-          values %{ $self->reverse_relationship_info($rel) },
-        ) ? 0 : 1,
+        rev_rel_is_optional => (
+          ( grep {
+            ($_->{attrs}{join_type}||'') !~ /^left/i
+          } values %{ $self->reverse_relationship_info($rel) } )
+            ? 0
+            : 1
+        ),
 
         # if this is a 1:1 our own collapser can be used as a collapse-map
         # (regardless of left or not)