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Merge pull request #34415 from Ana06/present_associations

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Clarify the validation of present associations
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Gannon McGibbon 2018-11-09 14:53:56 -05:00 committed by GitHub
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guides/source/active_record_validations.md
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@ -538,7 +538,8 @@ end
If you want to be sure that an association is present, you'll need to test
whether the associated object itself is present, and not the foreign key used
to map the association.
to map the association. This way, it is not only checked that the foreign key
is not empty but also that the referenced object exists.
```ruby
class LineItem < ApplicationRecord