How to check if an ActiveRecord association was already eager loaded

if you need to know whether to use a pre-laoded collection using eager loading or fech the collections, you can always call loaded? method:

```ruby
if user.contact_phones.loaded?
  user.contact_phones.detect? {|phone| phone.primary }
else
  user.contact_phones.find_by(primary: true)
end
```  


Edwin Cruz
April 19, 2021