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author | claudiob <claudiob@gmail.com> | 2014-12-24 09:58:19 +0100 |
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committer | claudiob <claudiob@gmail.com> | 2015-01-02 15:31:56 -0800 |
commit | 9c65c539e2caa4590aded1975aead008f8135da4 (patch) | |
tree | c953eedd0f678bce87c4162de14a9d50458885c6 /activemodel/lib/active_model/serialization.rb | |
parent | bb78af73ab7e86fd9662e8810e346b082a1ae193 (diff) | |
download | rails-9c65c539e2caa4590aded1975aead008f8135da4.tar.gz rails-9c65c539e2caa4590aded1975aead008f8135da4.tar.bz2 rails-9c65c539e2caa4590aded1975aead008f8135da4.zip |
Add config to halt callback chain on return false
This stems from [a comment](rails#17227 (comment)) by @dhh.
In summary:
* New Rails 5.0 apps will not accept `return false` as a way to halt callback chains, and will not display a deprecation warning.
* Existing apps ported to Rails 5.0 will still accept `return false` as a way to halt callback chains, albeit with a deprecation warning.
For this purpose, this commit introduces a Rails configuration option:
```ruby
config.active_support.halt_callback_chains_on_return_false
```
For new Rails 5.0 apps, this option will be set to `false` by a new initializer
`config/initializers/callback_terminator.rb`:
```ruby
Rails.application.config.active_support.halt_callback_chains_on_return_false = false
```
For existing apps ported to Rails 5.0, the initializers above will not exist.
Even running `rake rails:update` will not create this initializer.
Since the default value of `halt_callback_chains_on_return_false` is set to
`true`, these apps will still accept `return true` as a way to halt callback
chains, displaying a deprecation warning.
Developers will be able to switch to the new behavior (and stop the warning)
by manually adding the line above to their `config/application.rb`.
A gist with the suggested release notes to add to Rails 5.0 after this
commit is available at https://gist.github.com/claudiob/614c59409fb7d11f2931
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