owners once

the @associated_records_by_owner ivar

code

conditionals from the individual preloaded classes

and possibly different rules for finding those objects

objects

or even be numbers, so sorting by id doesn't make sense.  Please use `sort_by`
and specify the attribute you wish to sort with.  For example, change:

  Post.all.to_a.sort

to:

  Post.all.to_a.sort_by(&:id)

Fix an issue where router can't recognize downcased url encoding path.