Updated main docs, altered mail address in POD for 0.01

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Schema.pm

diff --git a/lib/DBIx/Class/Schema.pm b/lib/DBIx/Class/Schema.pm
index fd992e1..d33f4d4 100644 (file)
--- a/lib/DBIx/Class/Schema.pm
+++ b/lib/DBIx/Class/Schema.pm
@@ -4,20 +4,73 @@ use strict;
 use warnings;
 
 use base qw/Class::Data::Inheritable/;
-use DBIx::Class;
+use base qw/DBIx::Class/;
 
-__PACKAGE__->mk_classdata('_class_registrations' => {});
+__PACKAGE__->load_components(qw/Exception/);
+__PACKAGE__->mk_classdata('class_registrations' => {});
+
+=head1 NAME
+
+DBIx::Class::Schema - composable schemas
+
+=head1 SYNOPSIS
+
+  in My/Schema.pm
+
+  package My::Schema;
+
+  use base qw/DBIx::Class::Schema/;
+
+  __PACKAGE__->load_classes(qw/Foo Bar Baz/);
+
+  in My/Schema/Foo.pm
+
+  package My::Schema::Foo;
+
+  use base qw/DBIx::Class::Core/;
+
+  __PACKAGE__->table('foo');
+  ...
+
+  in My/DB.pm
+
+  use My::Schema;
+
+  My::Schema->compose_connection('My::DB', $dsn, $user, $pass, $attrs);
+
+  then in app code
+
+  my @obj = My::DB::Foo->search({}); # My::DB::Foo isa My::Schema::Foo My::DB
+
+=head1 DESCRIPTION
+
+=head1 METHODS
+
+=over 4
+
+=cut
 
 sub register_class {
   my ($class, $name, $to_register) = @_;
-  my %reg = %{$class->_class_registrations};
+  my %reg = %{$class->class_registrations};
   $reg{$name} = $to_register;
-  $class->_class_registrations(\%reg);
+  $class->class_registrations(\%reg);
+}
+
+sub registered_classes {
+  return values %{shift->class_registrations};
 }
 
 sub load_classes {
   my $class = shift;
   my @comp = grep { $_ !~ /^#/ } @_;
+  unless (@comp) {
+    eval "require Module::Find;";
+    $class->throw("No arguments to load_classes and couldn't load".
+      " Module::Find ($@)") if $@;
+    @comp = map { substr $_, length "${class}::"  }
+              Module::Find::findallmod($class);
+  }
   foreach my $comp (@comp) {
     my $comp_class = "${class}::${comp}";
     eval "use $comp_class";
@@ -28,20 +81,53 @@ sub load_classes {
 
 sub compose_connection {
   my ($class, $target, @info) = @_;
+  my $conn_class = "${target}::_db";
+  $class->setup_connection_class($conn_class, @info);
+  my %reg = %{ $class->class_registrations };
+  my %target;
+  my %map;
+  while (my ($comp, $comp_class) = each %reg) {
+    my $target_class = "${target}::${comp}";
+    $class->inject_base($target_class, $conn_class, $comp_class);
+    @map{$comp, $comp_class} = ($target_class, $target_class);
+  }
   {
     no strict 'refs';
-    unshift(@{"${target}::ISA"}, 'DBIx::Class');
+    *{"${target}::class"} =
+      sub {
+        my ($class, $to_map) = @_;
+        return $map{$to_map};
+      };
   }
+  $conn_class->class_resolver($target);
+}
+
+sub setup_connection_class {
+  my ($class, $target, @info) = @_;
+  $class->inject_base($target => 'DBIx::Class');
   $target->load_components('DB');
   $target->connection(@info);
-  my %reg = %{ $class->_class_registrations };
-  while (my ($comp, $comp_class) = each %reg) {
-    my $target_class = "${target}::${comp}";
-    {
-      no strict 'refs';
-      unshift(@{"${target_class}::ISA"}, $comp_class, $target);
-    }
+}
+
+sub inject_base {
+  my ($class, $target, @to_inject) = @_;
+  {
+    no strict 'refs';
+    unshift(@{"${target}::ISA"}, grep { $target ne $_ } @to_inject);
   }
 }
 
 1;
+
+=back
+
+=head1 AUTHORS
+
+Matt S. Trout <mst@shadowcatsystems.co.uk>
+
+=head1 LICENSE
+
+You may distribute this code under the same terms as Perl itself.
+
+=cut
+