Original:
* `config.active_record.belongs_to_required_by_default` is a boolean
value and controls whether `belongs_to` association is required by
default.
Modified version:
* `config.active_record.belongs_to_required_by_default` is a boolean
value and controls whether validation error is triggered by
default if `belongs_to` association is not present or not valid.
Sure this is `destroy` method of PhotosController, but in this chapter
these methods which mapped by the router are called "action".
For example:
```ruby
get '/patients/:id', to: 'patients#show'
```
is described to dispatch "controller's `show` action".
I added that *structure.sql* file can be used when *db:reset* is run.
*db:reset* tasks states *db:reset* loads database from *db/schema.rb*
or *db/structure.sql* depending on the configuration (although
*db/schema.rb* is the default), hence the change.
This reverts commit 37423e4ff883ad5584bab983aceb4b2b759a1fd8.
Jeremy is right that we shouldn't remove this. The fact is that many
engines are depending on this middleware to be in the default stack.
This ties our hands and forces us to keep the middleware in the stack so
that engines will work. To be extremely clear, I think this is another
smell of "the rack stack" that we have in place. When manipulating
middleware, we should have meaningful names for places in the req / res
lifecycle **not** have engines depend on a particular constant be in a
particular place in the stack. This is a weakness of the API that we
have to figure out a way to address before removing the constant.
As far as timing attacks are concerned, we can reduce the granularity
such that it isn't useful information for hackers, but is still useful
for developers.
The runtime header is a potential target for timing attacks since it
returns the amount of time spent on the server (eliminating network
speed). Total time is also not accurate for streaming responses.
The middleware can be added back via:
```ruby
config.middleware.ues ::Rack::Runtime
```
Move from `AS::Callbacks::CallbackChain.halt_and_display_warning_on_return_false`
to `AS::Callbacks.halt_and_display_warning_on_return_false` base on
[this
discussion](https://github.com/rails/rails/pull/21218#discussion_r39354580)
Fix the documentation broken by 0a120a818d413c64ff9867125f0b03788fc306f8
* A `has_many` dependant association accepts `[:destroy, :delete_all, :nullify,
:restrict_with_error, :restrict_with_exception]` as options.
Currently the documentation references `delete` instead of `delete_all`
* Adds documentation for other options
