From 53ff5fc62f9d11b6f60d371df959137f4bf40728 Mon Sep 17 00:00:00 2001 From: "yuuji.yaginuma" Date: Sat, 18 Feb 2017 10:36:51 +0900 Subject: Remove deprecate passing string to `:if` and `:unless` conditional options [ci skip] Follow up to #27608 --- guides/source/active_record_callbacks.md | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'guides/source/active_record_callbacks.md') diff --git a/guides/source/active_record_callbacks.md b/guides/source/active_record_callbacks.md index 666d987f8c..77bd3c97e8 100644 --- a/guides/source/active_record_callbacks.md +++ b/guides/source/active_record_callbacks.md @@ -288,7 +288,7 @@ Article destroyed Conditional Callbacks --------------------- -As with validations, we can also make the calling of a callback method conditional on the satisfaction of a given predicate. We can do this using the `:if` and `:unless` options, which can take a symbol, a string, a `Proc` or an `Array`. You may use the `:if` option when you want to specify under which conditions the callback **should** be called. If you want to specify the conditions under which the callback **should not** be called, then you may use the `:unless` option. +As with validations, we can also make the calling of a callback method conditional on the satisfaction of a given predicate. We can do this using the `:if` and `:unless` options, which can take a symbol, a `Proc` or an `Array`. You may use the `:if` option when you want to specify under which conditions the callback **should** be called. If you want to specify the conditions under which the callback **should not** be called, then you may use the `:unless` option. ### Using `:if` and `:unless` with a `Symbol` @@ -300,16 +300,6 @@ class Order < ApplicationRecord end ``` -### Using `:if` and `:unless` with a String - -You can also use a string that will be evaluated using `eval` and hence needs to contain valid Ruby code. You should use this option only when the string represents a really short condition: - -```ruby -class Order < ApplicationRecord - before_save :normalize_card_number, if: "paid_with_card?" -end -``` - ### Using `:if` and `:unless` with a `Proc` Finally, it is possible to associate `:if` and `:unless` with a `Proc` object. This option is best suited when writing short validation methods, usually one-liners: -- cgit v1.2.3