Allow a user to skip the default create execution

Closes #340

GETTING_STARTED.md

@@ -788,6 +788,28 @@ FactoryGirl.json(:user)
 Finally, you can override factory\_girl's own strategies if you'd like by
 registering a new object in place of the strategies.
 
+Custom Methods to Persist Objects
+------------------------------
+
+By default, creating a record will call `save!` on the instance; since this
+may not always be ideal, you can override that behavior by defining
+`to_create` on the factory:
+
+```ruby
+factory :different_orm_model do
+  to_create {|instance| instance.persist! }
+end
+```
+
+To disable the persistence method altogether on create, you can `skip_create`
+for that factory:
+
+```ruby
+factory :user_without_database do
+  skip_create
+end
+```
+
 Cucumber Integration
 --------------------
 

lib/factory_girl/definition_proxy.rb

@@ -144,6 +144,10 @@ module FactoryGirl
       @definition.to_create(&block)
     end
 
+    def skip_create
+      @definition.to_create {|instance| }
+    end
+
     def factory(name, options = {}, &block)
       @child_factories << [name, options, block]
     end

spec/acceptance/skip_create_spec.rb

@@ -0,0 +1,19 @@
+require "spec_helper"
+
+describe "skipping the default create" do
+  before do
+    define_model("User", email: :string)
+
+    FactoryGirl.define do
+      factory :user do
+        skip_create
+
+        email "john@example.com"
+      end
+    end
+  end
+
+  it "doesn't execute anything when creating the instance" do
+    FactoryGirl.create(:user).should_not be_persisted
+  end
+end