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Description of problem:
host.host_collections is not available in reporting template unless safe mode is disabled.

Version-Release number of selected component (if applicable):
Satellite 6.6


How reproducible:
100%

Steps to Reproduce:
1. Add line to Registered hosts report:  "        'Host Collections': host.host_collections,"
2. Run report


Actual results:
Report fails:  undefined method '#host_collections' for Host::Managed::Jail (Host::Managed)
If safe mode disabled, report works as expected


Expected results:
Report works with safe mode enabled

Connecting redmine issue https://projects.theforeman.org/issues/27893 from this bug

Verified with Sat 6.8 snap 2.1. Used reproducer from OP, the column was added with correct content.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Important: Satellite 6.8 release), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2020:4366