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Use :unprocessable_content in generated Devise config for Rack 3.1+, avoid Rack warnings (#5797)

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In Rack v3.1.0, the symbol for HTTP status code 422 was changed from `:unprocessable_entity` to `:unprocessable_content`.

As a result, when using rack 3.2 with the following configuration in `config/initializers/devise.rb`, a warning is shown on login failure:

```ruby
# config/initializers/devise.rb
Devise.setup do |config|
  ...
  config.responder.error_status = :unprocessable_entity
```

Warning message:

```sh
/path-to-app/vendor/bundle/ruby/3.4.0/gems/devise-4.9.4/lib/devise/failure_app.rb:80: warning: Status code :unprocessable_entity is deprecated and will be removed in a future version of Rack. Please use :unprocessable_content instead.
```

This warning can be resolved by updating the config as follows:
```diff
# config/initializers/devise.rb
Devise.setup do |config|
  ...
+  config.responder.error_status = :unprocessable_content
-  config.responder.error_status = :unprocessable_entity
```

This fixes the root cause of the warning for new apps by adjusting the generated config during `$ rails generate devise:install` depending on the rack version, so new apps using newer Rack versions generate `error_status = :unprocessable_content` instead of `:unprocessable_entity`.

Existing apps are handled by [latest versions of Rails, which will now transparently convert the code under the hood to avoid the Rack warning](https://github.com/rails/rails/pull/53383), and Devise will use that translation layer when available in the failure app to prevent the warning there as well (since that isn't covered by Rails automatic conversion).

Signed-off-by: Carlos Antonio da Silva <carlosantoniodasilva@gmail.com>
This commit is contained in:
Taketo Takashima
2025-12-31 22:45:09 +09:00
committed by GitHub
parent d13ef89afb
commit 8054ad55c3
8 changed files with 19 additions and 8 deletions
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2
lib/generators/templates/devise.rb
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@@ -305,7 +305,7 @@ Devise.setup do |config|
# apps is `200 OK` and `302 Found` respectively, but new apps are generated with
# these new defaults that match Hotwire/Turbo behavior.
# Note: These might become the new default in future versions of Devise.
config.responder.error_status = :unprocessable_entity
config.responder.error_status = <%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>
config.responder.redirect_status = :see_other
# ==> Configuration for :registerable