How do I specify a default parameter value for a Pylons action?

I have an action which looks like this:

class ArticleController(BaseController):
    def all(self, page, pagesize):

I want to be able to access /article/all/{page}/{pagesize}, with default values for page and pagesize.

I tried setting the default values in the action method, but then apparently both page and pagesize get set to the default value if I only set a page value.

I also tried something like this, but it doesn't work either:

map.connect('/article/all/{page}/{pagesize}', controller='article',
            action='all')
map.connect('/', controller='article', action='all', page=0, pagesize=5)
map.connect('/article/all/', controller='article', action='all', page=0,
            pagesize=5)

Actually, in that case it works when I access / or /article/all/. But it doesn't work with /article/all (even when I remove the trailing / in the route accordingly).

Looking at Routes' documentation it looks like default values shouldn't work at all in that case, so maybe it's some kind or undefined behavior开发者_开发技巧.

Anyway, my question is, how can I get all() to be called with default values for page and pagesize when accessing /article/all and /article/all/42?

(I know I could use the query string instead. map.redirect() also kind of does the trick, but I don't really want to redirect.)

Your routes should look like that:

map.connect('/article/all',
    controller='Article', action='all',
    page=0, pagesize=5)
map.connect('/article/all/{page}',
    controller='Article', action='all',
    pagesize=5)
map.connect('/article/all/{page}/{pagesize}',
    controller='Article', action='all')

You don't have to put default values in the method itself. So your controller should look like this:

class ArticleController(BaseController):
    def all(self, page, pagesize):
        return 'Page: %s. Pagesize: %s.' % (page, pagesize)