Port-an-existing-app-to-OOD.md

@@ -150,6 +150,42 @@ class SimulationsController < ApplicationController
 end
 ```
 
+3. To ensure that update_jobs is called prior to the `@simulation` object being created, get rid of the `before_action :set_simulation` and call this explicitly in each controller action:
+
+```diff
+class SimulationsController < ApplicationController
+- before_action :set_simulation, only: [:show, :edit, :update, :destroy, :submit, :copy]
+  before_action :update_jobs, only: [:index, :show]
+
+...
+  def show
++   set_simulation
+  end
+
+...
+
+  def edit
++   set_simulation
+  end
+
+...
+
+  def update
++   set_simulation
+    respond_to do |format|
+...
+  def destroy
++   set_simulation
+    respond_to do |format|
+...
+  def submit
++   set_simulation
+    respond_to do |format|
+...
+  def copy
++   set_simulation
+    @simulation = @simulation.copy
+```
 
 ## Test Changes