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Rails dependent which options are possible?

Tags:

ruby-on-rails

ruby-on-rails-4

activerecord

destroy

dependent-destroy

I get the following error in Rails 4:

dependent option must be one of destroy delete

Per https://github.com/rails/rails/issues/3458, other options were supported in older versions. But what is possible nowadays? I could not find any other documentation.

like image 323
Georg Heiler Avatar asked Sep 21 '14 18:09

Georg Heiler

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2 Answers

Docs are available here

Looks like the following options are supported:

  • nil - do nothing (default).

  • :destroy - causes all the associated objects to also be destroyed.

  • :delete_all - causes all the associated objects to be deleted directly from the database (so callbacks will not be executed).

  • :nullify - causes the foreign keys to be set to NULL. Callbacks are not executed.

  • :restrict_with_exception - causes an exception to be raised if there are any associated records.

  • :restrict_with_error - causes an error to be added to the owner if there are any associated objects.

like image 116
Ben Avatar answered Oct 17 '22 07:10

Ben

Adding to Ben's Answer, if it is required to do nothing on deletion, nil (which is default behaviour) can also be used

like image 29
Suleman Uzair Avatar answered Oct 17 '22 09:10

Suleman Uzair
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