add is_valid check and make sure you can't add a table with the same name

diff --git a/lib/SQL/Translator/Object/Table.pm b/lib/SQL/Translator/Object/Table.pm
index 54d28c1..bc5f9d0 100644 (file)
--- a/lib/SQL/Translator/Object/Table.pm
+++ b/lib/SQL/Translator/Object/Table.pm
@@ -114,5 +114,9 @@ class SQL::Translator::Object::Table extends SQL::Translator::Object is dirty {
     multi method primary_key(Any $) { grep /^PRIMARY KEY$/, $_->type for $self->get_constraints }
     multi method primary_key(Str $column) { $self->get_column($column)->is_primary_key(1) }
 
+    method is_valid { return $self->get_columns ? 1 : undef }
     method order { }
+
+    before name($name?) { die "Can't use table name $name" if $name && $self->schema->exists_table($name); }
+
 }