Description of problem:
We were building internal instances for upgrade testing and Installed Sat6.0 along with external capsule on rhel6. Later, we upgraded the satellite as well as capsule with Sat6.1.11 and both capsule/satellite upgraded successfully. However, when we tried to sync the satellite with capsule, got following error:

~]# hammer -u admin -p changeme capsule content synchronize --id=2
[............................................................................................................................................] [100%]
undefined method `each' for nil:NilClass

production.log:
===================
2016-12-05 12:16:08 [I] Processing by ForemanTasks::Api::TasksController#show as application/json;version=2
2016-12-05 12:16:08 [I]   Parameters: {"id"=>"f6388afe-21fb-4a6f-b377-886f94411e9c", "task"=>{}}
2016-12-05 12:16:08 [W] Polling failed, attempt no. 1, retrying in 2
2016-12-05 12:16:08 [W] undefined method `each' for nil:NilClass (NoMethodError)
/opt/rh/ruby193/root/usr/share/gems/gems/katello-2.2.0.93/app/lib/actions/pulp/consumer/sync_node.rb:66:in `changed_repos'
/opt/rh/ruby193/root/usr/share/gems/gems/katello-2.2.0.93/app/lib/actions/pulp/consumer/sync_node.rb:51:in `external_task='
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/action/polling.rb:98:in `poll_external_task_with_rescue'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/action/polling.rb:21:in `run'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/action/cancellable.rb:9:in `run'
/opt/rh/ruby193/root/usr/share/gems/gems/katello-2.2.0.93/app/lib/actions/pulp/abstract_async_task.rb:57:in `run'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/action.rb:487:in `block (3 levels) in execute_run'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/middleware/stack.rb:26:in `call'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/middleware/stack.rb:26:in `pass'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/middleware.rb:16:in `pass'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/middleware.rb:25:in `run'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/middleware/stack.rb:22:in `call'
/opt/rh/ruby193/root/usr/share/gems/gems/dynflow-0.7.7.9/lib/dynflow/middleware/stack.rb:26:in `pass'




Version-Release number of selected component (if applicable):
upgraded sat6.1.11

How reproducible:


Steps to Reproduce:
1. install sat6.0/capsule6.0
2. upgrade the satellite to 6.1.11
3.

Actual results:
capsule sync failed with error:
 [W] undefined method `each' for nil:NilClass (NoMethodError

Expected results:
sync should work

Additional info:

suggested fix by dev Justin Sherrill:
--

--- /tmp/sync_node.rb   2016-06-10 12:25:38.975904474 -0400
+++ app/lib/actions/pulp/consumer/sync_node.rb  2016-06-10 12:26:54.999712679 -0400
@@ -63,7 +63,7 @@
           end

           if pulp_task && pulp_task['state'] == 'finished' && pulp_task['result']
-            pulp_task['result']['details']['repository']['details']['repositories'].each do |repo|
+           (pulp_task['result'].try(:[], 'details').try(:[], 'repository').try(:[], 'details').try(:[], :repositories) || []).each do |repo|
               changes[repo['repo_id']] = (repo['units']['added'] > 0 || repo['units']['removed'] > 0 || repo['units']['updated'] > 0)
             end
           end