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I have two models - "symbols" and "users". Among other attributes,
symbols has "created_by_id" and "updated_by_id" attributes which are
id's of users that created/updated a certain symbol entry.
Let's say I want to display the symbols table with their "symbol"
attribute and the nested "created by" and "updated by" (user.username)
attributes for each symbol entry. Resulting table should look something
symbol created_by updated_by