Move the code to create accessors out of ColumnCase and into ColumnGroups.

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / CDBICompat / ColumnGroups.pm

diff --git a/lib/DBIx/Class/CDBICompat/ColumnGroups.pm b/lib/DBIx/Class/CDBICompat/ColumnGroups.pm
index 51a40f9..fa87ac1 100644 (file)
--- a/lib/DBIx/Class/CDBICompat/ColumnGroups.pm
+++ b/lib/DBIx/Class/CDBICompat/ColumnGroups.pm
@@ -55,6 +55,71 @@ sub _register_column_group {
   $class->_column_groups($groups);
 }
 
+# CDBI will never overwrite an accessor, but it only uses one
+# accessor for all column types.  DBIC uses many different
+# accessor types so, for example, if you declare a column()
+# and then a has_a() for that same column it must overwrite.
+#
+# To make this work CDBICompat has decide if an accessor
+# method was put there by itself and only then overwrite.
+{
+  my %our_accessors;
+
+  sub _has_custom_accessor {
+    my($class, $name) = @_;
+    
+    no strict 'refs';
+    my $existing_accessor = *{$class .'::'. $name}{CODE};
+    return $existing_accessor && !$our_accessors{$existing_accessor};
+  }
+
+  sub _deploy_accessor {
+    my($class, $name, $accessor) = @_;
+
+    return if $class->_has_custom_accessor($name);
+
+    {
+      no strict 'refs';
+      no warnings 'redefine';
+      *{$class .'::'. $name} = $accessor;
+    }
+    
+    $our_accessors{$accessor}++;
+
+    return 1;
+  }
+}
+
+sub _mk_group_accessors {
+  my ($class, $type, $group, @fields) = @_;
+
+  # So we don't have to do lots of lookups inside the loop.
+  my $maker = $class->can($type) unless ref $type;
+
+  # warn "$class $type $group\n";
+  foreach my $field (@fields) {
+    if( $field eq 'DESTROY' ) {
+        carp("Having a data accessor named DESTROY in ".
+             "'$class' is unwise.");
+    }
+
+    my $name = $field;
+
+    ($name, $field) = @$field if ref $field;
+
+    my $accessor = $class->$maker($group, $field);
+    my $alias = "_${name}_accessor";
+
+    # warn "  $field $alias\n";
+    {
+      no strict 'refs';
+      
+      $class->_deploy_accessor($name,  $accessor);
+      $class->_deploy_accessor($alias, $accessor);
+    }
+  }
+}
+
 sub all_columns { return shift->result_source_instance->columns; }
 
 sub primary_column {