- When lazy load hooks were triggered we were using
`Object.instance_eval` which evaluates the block in the context of
the class being passed. Most of the time that class was a
`Class`. If one wants to define a instance method on the class then
it wasn't possible.
```ruby
class A; end;
A.instance_eval do
def foo
puts 'bar'
end
end
A.new.foo #> NoMethodError: undefined method `foo`
A.foo #> bar
```
- This PR checks what object is passed when triggering the hooks and
either call `class_eval` or `instance_eval`. My rational and assumptions being
that if an instance of a class is passed, then the blocks needs to
evaluate in the context of that instance (i.e. defining a method
should only define it on that instance).
On the other hand, if a Class or Module is passed when triggering
hooks, then defining a method should define it on the class itself
- #32776 Pushed me to introduce this change
Provide run_once: true option to on_load in case you want a hook only to be executed once. This may be useful in cases where executing a hook several times may have undesired side effects
* before_configuration: this hook is run immediately after the Application class
comes into existence, but before the user has added any configuration. This is
the appropriate place to set configuration for your plugin
* before_initialize: This is run after all of the user's configuration has completed,
but before any initializers have begun (in other words, it runs right after
config/environments/{development,production,test}.rb)
* after_initialize: This is run after all of the initializers have run. It is an
appropriate place for forking in a preforking setup
Each of these hooks may be used via ActiveSupport.on_load(name) { }. In all these cases, the context inside the block will be the Application object. This means that for simple cases, you can use these hooks without needing to create a Railtie.
