Pyramid Route方式中减少一点add_route的方法

用了Pyramid Route方式之后，经常会面对一大堆add_route的定义，灵活利用Pyramid提供的一些便利技巧，可以大大减少这些route的定义。下面介绍一个简单的技巧：

@view_defaults(route_name='myroute' )

class MyController(object):

    def __init__(self, request):

        self.request = request

        print 'do something before every action.'

    @view_config(match_param=('ctrl=my', 'action=action1'))

    def action1(self):

        print self.request.matchdict['ctrl'], self.request.matchdict['action'], self.request.matchdict['pa']

        return Response('in my controller action 1')

    @view_config(match_param=('ctrl=my', 'action=action2'))

    def action2(self):

        print self.request.matchdict['ctrl'], self.request.matchdict['action'], self.request.matchdict['pa']

        return Response('in my controller action 2')

    @view_config(match_param=('ctrl=my', 'action=action3'), custom_predicates=(lambda context, request: request.matchdict['pa'][0]=='3',))

    def action3(self):

        print self.request.matchdict['ctrl'], self.request.matchdict['action'], self.request.matchdict['pa']

        return Response('in my controller action 3')

@view_defaults(route_name='myroute' )

class MyController2(object):

    def __init__(self, request):

        self.request = request

        print 'do something before every action.'

    @view_config(match_param=('ctrl=you','action=action1'))

    def action1(self):

        print self.request.matchdict['ctrl'], self.request.matchdict['action'], self.request.matchdict['pa']

        return Response('in you controller action 1')

    @view_config(match_param=('ctrl=you', 'action=action2'))

    def action2(self):

        print self.request.matchdict['ctrl'], self.request.matchdict['action'], self.request.matchdict['pa']

        return Response('in you controller action 2')

    @view_config(match_param=('ctrl=you', 'action=action3'), custom_predicates=(lambda context, request: request.matchdict['pa'][0]=='3',))

    def action3(self):

        print self.request.matchdict['ctrl'], self.request.matchdict['action'], self.request.matchdict['pa']

        return Response('in you controller action 3')

def main(global_config, **settings):

    """ This function returns a Pyramid WSGI application.

    """

    config = Configurator(settings=settings)

    config.add_static_view('static', 'static', cache_max_age=3600)

    config.add_route('myroute', '/{ctrl}/{action}*pa')

    config.add_route('home', '/')

    config.scan()

    return config.make_wsgi_app()