(after additional reconsideration)
I think that the - with respect to the current behaviour - whole
term 'named route' and mapper syntax is misleading.
Let's once more take a look at the original example:
>>> from routes import *
>>> m = Mapper()
>>> m.connect('gallery_thumb', 'images/gallery/:(image_id)_thumbnail.jpg')
>>> m.connect('gallery', 'images/gallery/:(image_id).jpg')
>>> url_for('gallery_thumb', image_id=1)
'/images/gallery/1_thumbnail.jpg'
Is the name 'gallery_thumb' in any way related to the url
'images/gallery/:(image_id)_thumbnail.jpg'? Is there any
association made between the two?
No! The syntax above does not - with the current algorithm - bring any
association between the name and the url (route).
So ... isn't the name 'named route' just misleading?
Let's now see what is it bringing us? Quoting your example:
>>> m.connect('gallery_thumb',
'images/gallery/:(image_id)_:(image_size).jpg', image_size='thumbnail')
>>> m.connect('gallery', 'images/gallery/:(image_id).jpg')
>>> url_for('gallery_thumb', image_id=1)
'/images/gallery/1_thumbnail.jpg'
>>> url_for('gallery', image_id=1)
'/images/gallery/1.jpg'
As you already explained, the 'gallery_thumb' name is bringing us
*only* one thing: default parameter image_size='thumbnail'.
What surely could be better expressed by some other syntax. For
example:
>>> m.alias('gallery_thumb', image_size='thumbnail')
Also, it is of course just an alias/macro/parameter set/.... It is
in no way *named route*.
Note that in this very thread you already have three different
people who happened to be confused by the current behaviour.
I think that 'named routes' can be very useful in complicated url
construction cases, but only if they do what the name suggest
- enforce using the named rule.
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