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| -rw-r--r-- | guides/source/active_record_callbacks.md | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/guides/source/active_record_callbacks.md b/guides/source/active_record_callbacks.md index ebdee446f9..4579b748df 100644 --- a/guides/source/active_record_callbacks.md +++ b/guides/source/active_record_callbacks.md @@ -338,6 +338,20 @@ class Comment < ApplicationRecord end ``` +### Combining Callback Conditions + +When multiple conditions define whether or not a callback should happen, an `Array` can be used. Moreover, you can apply both `:if` and `:unless` to the same callback. + +```ruby +class Comment < ApplicationRecord + after_create :send_email_to_author, + if: [Proc.new { |c| c.user.allow_send_email? }, :author_wants_emails?], + unless: Proc.new { |c| c.article.ignore_comments? } +end +``` + +The callback only runs when all the `:if` conditions and none of the `:unless` conditions are evaluated to `true`. + Callback Classes ---------------- |