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Merge pull request #26288 from maclover7/jm-revert-21995

Update `Rails.configuration` documentation
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guilleiguaran committed Aug 26, 2016
2 parents c8c8af9 + 2f5a40a commit f394f3ba763adbd073685a4a3f53b2a3ad71381a
Showing with 11 additions and 7 deletions.
  1. +11 −7 guides/source/configuring.md
@@ -1217,21 +1217,25 @@ NOTE. If you are running in a multi-threaded environment, there could be a chanc
Custom configuration
--------------------
You can configure your own code through the Rails configuration object with custom configuration. It works like this:
You can configure your own code through the Rails configuration object with
custom configuration under either the `config.x` namespace, or `config` directly.
The key difference between these two is that you should be using `config.x` if you
are defining _nested_ configuration (ex: `config.x.nested.nested.hi`), and just
`config` for _single level_ configuration (ex: `config.hello`).
```ruby
config.payment_processing.schedule = :daily
config.payment_processing.retries = 3
config.x.payment_processing.schedule = :daily
config.x.payment_processing.retries = 3
config.super_debugger = true
```
These configuration points are then available through the configuration object:
```ruby
Rails.configuration.payment_processing.schedule # => :daily
Rails.configuration.payment_processing.retries # => 3
Rails.configuration.super_debugger # => true
Rails.configuration.super_debugger.not_set # => nil
Rails.configuration.x.payment_processing.schedule # => :daily
Rails.configuration.x.payment_processing.retries # => 3
Rails.configuration.x.payment_processing.not_set # => nil
Rails.configuration.super_debugger # => true
```
You can also use `Rails::Application.config_for` to load whole configuration files:

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