init_arg can be undef

diff --git a/lib/Moose/Meta/Attribute.pm b/lib/Moose/Meta/Attribute.pm
index 28c0b8b..39036f4 100644 (file)
--- a/lib/Moose/Meta/Attribute.pm
+++ b/lib/Moose/Meta/Attribute.pm
@@ -208,7 +208,7 @@ sub initialize_instance_slot {
 
     my $val;
     my $value_is_set;
-    if (exists $params->{$init_arg}) {
+    if ( defined($init_arg) and exists $params->{$init_arg}) {
         $val = $params->{$init_arg};
         $value_is_set = 1;    
     }

diff --git a/lib/Moose/Meta/Class.pm b/lib/Moose/Meta/Class.pm
index 928cd18..be298e7 100644 (file)
--- a/lib/Moose/Meta/Class.pm
+++ b/lib/Moose/Meta/Class.pm
@@ -80,12 +80,11 @@ sub new_object {
     my ($class, %params) = @_;
     my $self = $class->SUPER::new_object(%params);
     foreach my $attr ($class->compute_all_applicable_attributes()) {
-        # FIXME:
-        # this does not accept undefined
-        # values, nor does it accept false
-        # values to be passed into the init-arg
-        next unless $params{$attr->init_arg} && $attr->can('has_trigger') && $attr->has_trigger;
-        $attr->trigger->($self, $params{$attr->init_arg}, $attr);
+        if ( defined( my $init_arg = $attr->init_arg ) ) {
+            if ( exists($params{$init_arg}) && $attr->can('has_trigger') && $attr->has_trigger ) {
+                $attr->trigger->($self, $params{$init_arg}, $attr);
+            }
+        }
     }
     return $self;
 }

diff --git a/t/020_attributes/018_no_init_arg.t b/t/020_attributes/018_no_init_arg.t
new file mode 100644 (file)
index 0000000..ae714ec
--- /dev/null
+++ b/t/020_attributes/018_no_init_arg.t
@@ -0,0 +1,35 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More tests => 5;
+use Test::Exception;
+
+BEGIN {
+    use_ok('Moose');           
+}
+
+{
+    package Foo;
+    use Moose;
+    
+    eval {
+        has 'foo' => (
+            is => "rw",
+            init_arg => undef,
+        );
+    };
+    ::ok(!$@, '... created the attr okay');
+}
+
+{
+    my $foo = Foo->new( foo => "bar" );
+    isa_ok($foo, 'Foo');
+
+    is( $foo->foo, undef, "field is not set via init arg" );
+
+    $foo->foo("blah");
+
+    is( $foo->foo, "blah", "field is set via setter" );
+}