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| author | Rafael França <rafaelmfranca@gmail.com> | 2018-08-21 14:53:03 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-08-21 14:53:03 -0500 |
| commit | c03dde6117ed995d1ada57736b5b0d44dfe31ed5 (patch) | |
| tree | 33e0e5e6cf087c31c96d91f9372b1a383c14387d /guides | |
| parent | 27934451b2f3f84770ac165e63a624fe075b0785 (diff) | |
| parent | ec6089995d456c91aadf1cb2324b2e626016975c (diff) | |
| download | rails-c03dde6117ed995d1ada57736b5b0d44dfe31ed5.tar.gz rails-c03dde6117ed995d1ada57736b5b0d44dfe31ed5.tar.bz2 rails-c03dde6117ed995d1ada57736b5b0d44dfe31ed5.zip | |
Merge pull request #29838 from fschwahn/patch-1
Add usage of procs without arguments to callbacks guide
Diffstat (limited to 'guides')
| -rw-r--r-- | guides/source/active_record_callbacks.md | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/guides/source/active_record_callbacks.md b/guides/source/active_record_callbacks.md index 5b06ff78bb..5946acb412 100644 --- a/guides/source/active_record_callbacks.md +++ b/guides/source/active_record_callbacks.md @@ -319,6 +319,14 @@ class Order < ApplicationRecord end ``` +As the proc is evaluated in the context of the object, it is also possible to write this as: + +```ruby +class Order < ApplicationRecord + before_save :normalize_card_number, if: Proc.new { paid_with_card? } +end +``` + ### Multiple Conditions for Callbacks When writing conditional callbacks, it is possible to mix both `:if` and `:unless` in the same callback declaration: |