Overriding couchrest's database delete method to ensure design cache is deleted

history.md

@@ -8,6 +8,7 @@
   * Rails 3.1 support (Peter Williams)
   * Initialization blocks when creating new models (Peter Williams)
   * Removed railties dependency (DAddYE)
+  * DesignDoc cache refreshed if a database is deleted.
 
 
 ## 1.1.0.beta5 - 2011-04-30

lib/couchrest/model/design_doc.rb

@@ -108,8 +108,6 @@ module CouchRest
           }
         end
 
-
-
       end # module ClassMethods
 
     end

lib/couchrest/model/support/couchrest_database.rb

@@ -0,0 +1,13 @@
+#
+# Extend CouchRest's normal database delete! method to ensure any caches are
+# also emptied. Given that this is a rare event, and the consequences are not 
+# very severe, we just completely empty the cache.
+#
+CouchRest::Database.class_eval do
+
+  def delete!
+    Thread.current[:couchrest_design_cache] = { }
+    CouchRest.delete @root
+  end
+
+end

lib/couchrest_model.rb

@@ -51,6 +51,7 @@ require "couchrest/model/designs/view"
 
 # Monkey patches applied to couchrest
 require "couchrest/model/support/couchrest_design"
+require "couchrest/model/support/couchrest_database"
 
 # Core Extensions
 require "couchrest/model/core_extensions/hash"

spec/couchrest/design_doc_spec.rb

@@ -155,6 +155,10 @@ describe "Design Documents" do
         Article.by_date
         Article.stored_design_doc['_rev'].should eql(orig)
       end
+      it "should recreate the design doc if database deleted" do
+        Article.database.recreate!
+        lambda { Article.by_date }.should_not raise_error(RestClient::ResourceNotFound)
+      end
     end
 
     describe "when auto_update_design_doc false" do