In order to solve the issue #2221, I've added followlinks=True when calling listdir() from functions compile_views(), compile_models() and compile_controllers()
The followlinks argument is then used by the function when it calls os.walk(path...
Notice the "followlinks" argument of os.walk() is False by default, so this change won't make any difference. Every actual call to listdir() function won't need to be changed.
This change is needed to resolve issue #2221
This change is necessary to avoid an error ticket when you delete an upload field from a table (and also from the model definition). In those cases, requests to old URLs will throw a KeyError. With this fix, those requests return 404 as expected.
Also, catching AttributeError is still necessary for the situation when the table is removed entirely. If an old request come in, that sentence will throw an AttributeError, that will be catched properly, and request will return 404.
Lisandro