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Routes based dispatching for TurboGears2

Project description

About tgext.routes

tgext.routes provides a simple way to integrate routes based dispatch into TurboGears2 applications.


tgext.routes can be installed both from pypi or from bitbucket:

pip install tgext.routes

should just work for most of the users

Routing Single Actions

Routes matching is done through the @route decorator, each exposed method can be bound to one or multiple routes.

The only requirement is that you inherit from the RoutedController instance.

All routes registered through the @route decorator are registered starting from the controller mount point.

The following example registers the entry_by_date method for urls like /date/2012-01 and /date/2012-01-01:

from tgext.routes import RoutedController, route

class DateController(RoutedController):
    @route('{year}-{month}', day=33)
    def entry_by_date(self, year, month, day):
        return '%s ++ %s ++ %s' % (year, month, day)

class RootController(BaseController):
    date = DateController()

    def index(self):
        return 'Hello!'

Keep in mind that as @expose wraps it, the method is still accessible through ObjectDispatch routing, @route can just register additional routes.

If there is a route pointing to it, also actions that do not provide an @expose decoration are resolved, keep in mind that in that case you will have to render template manually.

In case you want to disable ObjectDispatch you can set disable_objectdispatch=True inside the controller. Keep in mind that it will disable ObjectDispatch for the whole controller and so you won’t be able to dispatch actions that do not provide a route from that controller on.

Routing Whole application

RoutedController can also be mounted as the application RootController. In that case instead of using the @route decorator you can even provide a routes.Mapper object as controller mapper attribute and register all the routes of your application:

class RootController(RoutedController):
    mapper = Mapper()
    mapper.connect('/', controller='home', action='index')
    mapper.connect('/json', controller='home', action='jsonexposed')
    mapper.connect('/unex', controller='home', action='unexposed')

In this case the controller argument is required and controller will be looked up inside the path specified by tg.config['paths']['controllers']. In the previous example a HomeController class will be looked for into the module to serve the /, /json and /unex paths through its index, jsonexposed and unexposed methods.

In case both a mapper attribute and @route decorator are used inside the same RoutedController, the @route decorator is applied after the mapper routes.

For more documentation about routes refer to Routes Documentation

Continuing with ObjectDispatch

When using tgext.routes as the primary routing method it is possible to tell it to continue with ObjectDispatch (or any specific dispatch method provided by the target controller) using _dispatch as the action of the route.

By default as routes are matched exactly providing a _dispatch action will provide no remainder, so it will only dispatch to index method of the target controller. To continue dispatching with a remaining part of the url you can use an _dispatch label:

mapper.connect('/forsub{_dispatch:.*?}', controller='home',  action='_dispatch')

This will dispatch to HomeController continuing with ObjectDispatch for anything that cames after /forsub part of the url.

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