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Fix validation based on object not _id. 

From https://github.com/rails/rails/issues/6161\#issuecomment-10750118
This commit is contained in:
Steve Klabnik 2012-11-27 08:51:36 -08:00
parent ba2fed4161
commit cfd324b4b6
1 changed files with 2 additions and 2 deletions
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4
guides/source/active_record_validations_callbacks.md
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@ -372,12 +372,12 @@ class Person < ActiveRecord::Base
end
```
If you want to be sure that an association is present, you'll need to test whether the foreign key used to map the association is present, and not the associated object itself.
If you want to be sure that an association is present, you'll need to test the associated object itself, and not whether the foreign key used to map the association is present:
```ruby
class LineItem < ActiveRecord::Base
belongs_to :order
validates :order_id, presence: true
validates :order, presence: true
end
```