SelectDateWidget doesn't accept its as_hidden rendering

[Bill Fenner <fenner@…>]

An apparently little-known fact about widgets that implement get_value_from_datadict is that they need to be able to accept whatever the widget returns for its "as_hidden" value as input. Otherwise, a form that uses as_hidden to propogate values from previous forms will fail:

>>> a = GetDate({'mydate_month':'4', 'mydate_day':'1', 'mydate_year':'2008'})
>>> print a['mydate'].as_hidden()
<input type="hidden" name="mydate" value="2008-4-1" id="id_mydate" />
>>> b=GetDate({'mydate':'2008-4-1'})
>>> print b.is_valid()
False

The attached diff has a fix for this problem, and a test.

[Bill Fenner <fenner@…>]

A one-line diff and 29 lines of test ;-)

[Simon G. <dev@…>]

1:29 code:test ratio? how very agile of you :)

[Bill Fenner <fenner@…>]

I was just tired of seeing needs_tests => 1 ;-)

[Malcolm Tredinnick]

(In [5859]) Fixed #4622 -- Fixed SelectDateWidget to work correctly when used as a hidden input field. Thanks, Bill Fenner.