Bug 1281302

Description of problem:
There is empty packages comparison list when comparing channel cloned in "original state" (i.e. no erratas) to its origin


Version-Release number of selected component (if applicable):
spacewalk-java-2.3.8-117.el6sat.noarch


How reproducible:
always


Steps to Reproduce:
1. Create new channel "channel":
   Channels -> Manage Software Channels -> Create Channel
2. Add one package to the channel:
   Channels -> Manage Software Channels -> channel -> Packages -> Add
   (I have used "Django14-1.4.21-1.el6.noarch")
3. a) Add one errata with another package:
      Channels -> Manage Software Channels -> channel -> Errata -> Add ->
      -> Create Custom Errata
      (I have created errata "errata")
   b) Add package to the errata:
      While on errata detail page (right after it is created) -> Packages -> Add
      (I have used "Django-south-0.7.5-1.el6-noarch")
   c) Publish errata "errata" to channel "channel", package as well
      While on errata detail page -> [Publish Errata] -> check "channel" ->
      -> [Publish Errata] -> check package -> [Continue]
4. Ensure you have correct packages and erratas in the channel:
   Channels -> Manage Software Channels -> channel -> Packages -> List / Remove
     (should list two packages: Django14 and Django-south in my case)
   Channels -> Manage Software Channels -> channel -> Errata -> List / Remove
     (should list one errata "errata")
5. Clone that channel without erratas:
   Channels -> Manage Software Channels -> Clone Channel
     Clone From: channel
     Clone: Original state of the channel (no errata)
6. Check packages and erratas which are part of the cloned channel:
   Channels -> Manage Software Channels -> Clone of channel -> Packages ->
   -> List / Remove
     (should list only one package: Django14 in my case)
   Channels -> Manage Software Channels -> Clone of channel -> Errata ->
   -> List / Remove
     (should say: There are no errata associated with this channel.)
7. Compare packages of cloned channel to its origin:
   Channels -> Manage Software Channels -> Clone of channel -> Packages ->
   -> Compare
     Compare to: "channel" -> [View Packages]


Actual results:
Empty list saying "No packages found for this critera."


Expected results:
IMO Django-south should be shown as missing in cloned channel in my case


Additional info:
I believe this is a query counting the difference:

select  pn.name as package_name,
       pa.name as arch,
       ch1.package_id as left_id,
       case when ch1.evr is null then null
           else evr_t_as_vre_simple(ch1.evr)
       end as left_nvrea,
       ch2.package_id as right_id,
       case when ch2.evr is null then null
           else evr_t_as_vre_simple(ch2.evr)
       end as right_nvrea,
       case when ch1.evr_id is null then -2
            when ch2.evr_id is null then 2
            else rpm.vercmp(ch1.epoch, ch1.version, ch1.release,
                            ch2.epoch, ch2.version, ch2.release)
       end as comparison
 from (select np1.name_id, np1.package_arch_id, np1.evr_id, np1.package_id,
               pe1.evr, pe1.epoch, pe1.version, pe1.release
         from rhnChannelNewestPackage np1
         join rhnPackageEvr pe1
           on pe1.id = np1.evr_id
       where channel_id = 116
       ) ch1
 full outer join (select np2.name_id, np2.package_arch_id, np2.evr_id, np2.package_id,
                       pe2.evr, pe2.epoch, pe2.version, pe2.release
                    from rhnChannelNewestPackage np2
                    join rhnPackageEvr pe2
                      on pe2.id = np2.evr_id
                   where channel_id = 127
       ) ch2
   on ch1.name_id = ch2.name_id
  and ch1.package_arch_id = ch2.package_arch_id
 join rhnPackageName pn
   on pn.id = coalesce(ch1.name_id, ch2.name_id)
 join rhnPackageArch pa
   on pa.id = coalesce(ch1.package_arch_id, ch2.package_arch_id)
where ch1.evr_id is null
   or ch2.evr_id is null
   or ch1.evr_id != ch2.evr_id

In my case "channel" have cid 135 and "Clone of channel" have 136.

rhnschema=# select count(*) from rhnChannelPackage where channel_id = 135;
 count 
-------
     2
(1 row)

rhnschema=# select count(*) from rhnChannelPackage where channel_id = 136;
 count 
-------
     1
(1 row)

rhnschema=# select count(*) from rhnChannelNewestPackage where channel_id = 135;
 count 
-------
     2
(1 row)

rhnschema=# select count(*) from rhnChannelNewestPackage where channel_id = 136;
 count 
-------
     2
(1 row)
rhnschema=# select * from rhnChannelPackage where channel_id = 136;
 channel_id | package_id |            created            |           modified            
------------+------------+-------------------------------+-------------------------------
        136 |      17937 | 2015-11-12 09:39:33.672644+01 | 2015-11-12 09:39:33.672644+01
(1 row)

rhnschema=# select * from rhnChannelNewestPackage where channel_id = 136;
 channel_id | name_id | evr_id | package_arch_id | package_id 
------------+---------+--------+-----------------+------------
        136 |    4923 |   6996 |             100 |      17937
        136 |    5541 |   7053 |             100 |      18607
(2 rows)