Added Show Base Image Support

README.rdoc

@@ -35,4 +35,23 @@ Response
   <base_image href='http://localhost:3000/base_images/1' id='1'>
     <name>MyFirstBaseImage</name>
     <description>This is my very first base image</description>
-  </base_image>
+  </base_image>
+
+==== Show Base Image
+
+Request
+
+  curl --header "Accept: application/xml" http://localhost:3000/base_images/1
+
+Response
+
+  Code: 201
+
+  Body:
+
+  <base_image href='http://localhost:3000/base_images/1' id='1'>
+    <name>MyFirstBaseImage</name>
+    <description>This is my very first base image</description>
+    <image_versions>
+    </image_versions>
+  </base_image>

app/controllers/image_management/application_controller.rb

@@ -1,5 +1,11 @@
 module ImageManagement
   class ApplicationController < ActionController::Base
     protect_from_forgery
+
+    rescue_from ActiveRecord::RecordNotFound, :with => :render_not_found
+
+    def render_not_found
+      render :nothing => true, :status => :not_found
+    end
   end
 end

app/views/image_management/base_images/_base_image.xml.haml

@@ -3,4 +3,7 @@
   %name= base_image.name
   %description= base_image.description
   - if base_image.template
-    = render :partial => 'image_management/templates/template_minimal', :locals => {:template => base_image.template}
+    = render :partial => 'image_management/templates/template_minimal', :locals => {:template => base_image.template}
+  %image_versions
+    - base_image.image_versions.each do |image_version|
+      = render :partial => 'image_management/image_versions/image_version_minimal', :locals => {:image_version => image_version}

spec/controllers/base_images_controller_spec.rb

@@ -26,7 +26,7 @@ module ImageManagement
 
             body = Hash.from_xml(response.body)
             body.keys.should  == ["base_image"]
-            body["base_image"].keys.should =~ ["template", "id", "href", "name", "description"]
+            body["base_image"].keys.should =~ ["template", "id", "href", "name", "description", "image_versions"]
             body["base_image"]["template"].keys.should =~ ["id", "href"]
           end
         end
@@ -38,6 +38,56 @@ module ImageManagement
           end
         end
       end
+
+      describe "Show Base Image" do
+        context "Success" do
+          it "should return an existing base image as XML" do
+            base_image = Factory.create(:base_image)
+            get :show, :id => base_image.id
+
+            response.code.should == "200"
+
+            body = Hash.from_xml(response.body)
+            body.keys.should  == ["base_image"]
+            body["base_image"].keys.should =~ ["id", "href", "name", "description", "image_versions"]
+          end
+
+          it "should return an existing base image as XML with template" do
+            base_image = Factory.create(:base_image_with_template)
+            get :show, :id => base_image.id
+
+            response.code.should == "200"
+
+            body = Hash.from_xml(response.body)
+            body.keys.should  == ["base_image"]
+            body["base_image"].keys.should =~ ["template", "id", "href", "name", "description", "image_versions"]
+            body["base_image"]["template"].keys.should =~ ["id", "href"]
+          end
+
+          it "should return an existing base image as XML with image versions" do
+            base_image = Factory.create(:base_image_with_template)
+            2.times do
+              Factory.create(:image_version, :base_image => base_image)
+            end
+
+            get :show, :id => base_image.id
+
+            response.code.should == "200"
+
+            body = Hash.from_xml(response.body)
+            body.keys.should  == ["base_image"]
+            body["base_image"].keys.should =~ ["image_versions", "template", "id", "href", "name", "description"]
+            body["base_image"]["image_versions"]["image_version"].size.should == 2
+          end
+        end
+
+        context "failure" do
+          it "should return a not found response when an base image does not exist" do
+            get :show, :id => -1
+            response.code.should == "404"
+          end
+        end
+      end
     end
   end
 end