[#4184] An Issue belongs to a Deliverable.

init.rb

@@ -61,6 +61,8 @@ Dispatcher.to_prepare :redmine_contracts do
   
   require_dependency 'project'
   Project.send(:include, RedmineContracts::Patches::ProjectPatch)
+  require_dependency 'issue'
+  Issue.send(:include, RedmineContracts::Patches::IssuePatch)
 end
 
 require 'redmine_contracts/hooks/view_layouts_base_html_head_hook'

lib/redmine_contracts/patches/issue_patch.rb

@@ -0,0 +1,21 @@
+module RedmineContracts
+  module Patches
+    module IssuePatch
+      def self.included(base)
+        base.extend(ClassMethods)
+
+        base.send(:include, InstanceMethods)
+        base.class_eval do
+          unloadable
+          belongs_to :deliverable
+        end
+      end
+
+      module ClassMethods
+      end
+
+      module InstanceMethods
+      end
+    end
+  end
+end

test/unit/lib/redmine_contracts/patches/issue_patch_test.rb

@@ -0,0 +1,9 @@
+require File.dirname(__FILE__) + '/../../../../test_helper'
+
+class RedmineContracts::Patches::IssueTest < ActionController::TestCase
+
+  context "Issue" do
+    subject { Issue.new }
+    should_belong_to :deliverable
+  end
+end