Use #create when a model doesn't know about #create!

Sequel 3.0 (and maybe earlier versions?) doesn't define a #create!
method on models, only #create.

lib/spawner.rb

@@ -8,6 +8,7 @@ def spawner &default
 
   def spawn attrs = {}
     @@spawn[self.name].call(model = OpenStruct.new)
-    create!(model.send(:table).merge(attrs))
+    factory_method = respond_to?(:create!) ? :create! : :create
+    send(factory_method, model.send(:table).merge(attrs))
   end
 end

test/all_test.rb

@@ -2,14 +2,14 @@
 require 'contest'
 require File.dirname(__FILE__) + "/../lib/spawner"
 
-class Foo
+class Base
   attr_accessor :attributes
 
   def initialize(attrs = {})
     @attributes = attrs
   end
 
-  def self.create!(attrs = {})
+  def self.create(attrs = {})
     new(attrs)
   end
 
@@ -19,9 +19,15 @@ def self.name; "Foo" end
 
   extend Spawner
 
-  spawner do |foo|
-    foo.bar = 7
-    foo.baz = 8
+  spawner do |object|
+    object.bar = 7
+    object.baz = 8
+  end
+end
+
+class Foo < Base
+  class << self
+    alias_method :create!, :create
   end
 end
 
@@ -34,6 +40,9 @@ def self.name; "Bar" end
   end
 end
 
+class Baz < Base
+end
+
 class TestFoo < Test::Unit::TestCase
   should "have a name class method" do
     assert Foo.respond_to?(:name)
@@ -97,5 +106,12 @@ class TestFoo < Test::Unit::TestCase
         end
       end
     end
+
+    context "and it doesn't understand #create! (only #create)" do
+      should "work anyway" do
+        baz = Baz.spawn :bar => 1
+        assert_equal 1, baz.bar
+      end
+    end
   end
 end