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体验新版 GitCode,发现更多精彩内容 >>
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153df92f
编写于
7月 22, 2010
作者:
P
Piotr Sarnacki
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Added documentation on endpoint, middeware stack and routes for Engine
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railties/lib/rails/engine.rb
railties/lib/rails/engine.rb
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railties/lib/rails/engine.rb
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153df92f
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@@ -87,6 +87,66 @@ module Rails
# all folders under "app" are automatically added to the load path. So if you have
# "app/observers", it's added by default.
#
# == Endpoint
#
# Engine can be also a rack application. It can be useful if you have a rack application that
# you would like to wrap with Engine and provide some of the Engine's features.
#
# To do that, use endpoint method:
# module MyEngine
# class Engine < Rails::Engine
# endpoint MyRackApplication
# end
# end
#
# Now you can mount your engine in application's routes just like that:
#
# MyRailsApp::Application.routes.draw do
# mount MyEngine::Engine => "/engine"
# end
#
# == Middleware stack
#
# As Engine can now be rack endpoint, it can also have a middleware stack. The usage is exactly
# the same as in application:
#
# module MyEngine
# class Engine < Rails::Engine
# middleware.use SomeMiddleware
# end
# end
#
# == Routes
#
# If you don't specify endpoint, routes will be used as default endpoint. You can use them
# just like you use application's routes:
#
# # ENGINE/config/routes.rb
# MyEngine::Engine.routes.draw do
# match "/" => "posts#index"
# end
#
# == Mount priority
#
# Note that now there can be more than one router in you application and it's better to avoid
# passing requests through many routers. Consider such situation:
#
# MyRailsApp::Application.routes.draw do
# mount MyEngine::Engine => "/blog"
# match "/blog/omg" => "main#omg"
# end
#
# MyEngine is mounted at "/blog" path and additionaly "/blog/omg" points application's controller.
# In such situation request to "/blog/omg" will go through MyEngine and if there is no such route
# in Engine's routes, it will be dispatched to "main#omg". It's much better to swap that:
#
# MyRailsApp::Application.routes.draw do
# match "/blog/omg" => "main#omg"
# mount MyEngine::Engine => "/blog"
# end
#
# Now, Engine will get only requests that were not handled by application.
#
class
Engine
<
Railtie
autoload
:Configurable
,
"rails/engine/configurable"
autoload
:Configuration
,
"rails/engine/configuration"
...
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