Hello,

We started to use Foreman on our cluster that uses DC/OS and found an issue where the fact importer in Foreman was rejecting some of the facts. We investigated and found that it was due to ActiveRecord's default length for a string (255 characters) being too small for some of the 'name' fields being stored in the 'fact_names' table.

An example of one of our mount points that breaks this 255 character limit for the fact name is:
'mountpoints::/var/lib/mesos/slave/slaves/8b44271e-4f05-4caa-8faf-f200c214bd4a-S236/frameworks/8b44271e-4f05-4caa-8faf-f200c214bd4a-0045/executors/kafka__3b71c0c0-b529-4786-9479-f69304e9dda2/runs/2aa2aacf-e83b-45a1-a4ab-105d927a5435/grapes-kafka-broker-data::device'

Upon altering the DB directly and changing the 'fact_name' model it successfully imported the facts from these machines.

We have a patch with a potential solution, though the increase in field size is substantial (255 to 4096) which may (or may not, I'm not knowledgeable enough about databases) have an impact on the performance of the backing database. Perhaps someone can chime in with a potentially more reasonable value?