make it possible to access fixtures excluded by a `default_scope`.

Prior to this patch you'd end up with an error like:

```
ActiveRecord::RecordNotFound: Couldn't find <Model> with 'id'=<id> [WHERE (<default_scope condition>)]
```

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Make it possible to access fixtures excluded by a `default_scope`.
+
+    *Yves Senn*
+
 *   Add `Table#name` to match `TableDefinition#name`.
 
     *Cody Cutrer*

activerecord/lib/active_record/fixtures.rb

@@ -806,7 +806,7 @@ module ActiveRecord
 
     def find
       if model_class
-        model_class.find(fixture[model_class.primary_key])
+        model_class.unscoped.find(fixture[model_class.primary_key])
       else
         raise FixtureClassNotFound, "No class attached to find."
       end

activerecord/test/cases/fixtures_test.rb

@@ -5,6 +5,7 @@ require 'models/admin/randomly_named_c1'
 require 'models/admin/user'
 require 'models/binary'
 require 'models/book'
+require 'models/bulb'
 require 'models/category'
 require 'models/company'
 require 'models/computer'
@@ -853,3 +854,16 @@ class CustomNameForFixtureOrModelTest < ActiveRecord::TestCase
     assert_equal 'randomly_named_table', Admin::ClassNameThatDoesNotFollowCONVENTIONS.table_name
   end
 end
+
+class FixturesWithDefaultScopeTest < ActiveRecord::TestCase
+  fixtures :bulbs
+
+  test "inserts fixtures excluded by a default scope" do
+    assert_equal 1, Bulb.count
+    assert_equal 2, Bulb.unscoped.count
+  end
+
+  test "allows access to fixtures excluded by a default scope" do
+    assert_equal "special", bulbs(:special).name
+  end
+end

activerecord/test/fixtures/bulbs.yml

@@ -0,0 +1,5 @@
+defaulty:
+  name: defaulty
+
+special:
+  name: special