Added Model#destroy and Model#destroy!

lib/dm-core/model.rb

@@ -494,6 +494,26 @@ def create!(attributes = {})
       _create(attributes, false)
     end
 
+    # Remove all Resources from the repository
+    #
+    # @return [Boolean]
+    #   true if the resources were successfully destroyed
+    #
+    # @api public
+    def destroy
+      all.destroy
+    end
+
+    # Remove all Resources from the repository, bypassing validation
+    #
+    # @return [Boolean]
+    #   true if the resources were successfully destroyed
+    #
+    # @api public
+    def destroy!
+      all.destroy!
+    end
+
     # Copy a set of records from one repository to another.
     #
     # @param [String] source_repository_name

spec/public/model_spec.rb

@@ -242,6 +242,18 @@ def model?; true end
       end
     end
 
+    [ :destroy, :destroy! ].each do |method|
+      describe "##{method}" do
+        subject { model.send(method) }
+
+        let(:model) { @article_model }
+
+        it 'should remove all resources' do
+          method(:subject).should change { model.any? }.from(true).to(false)
+        end
+      end
+    end
+
     it_should_behave_like 'Finder Interface'
 
     it 'DataMapper::Model should respond to raise_on_save_failure' do