Re: Re: Problem with ctx.get_value

Andrew McNamara <[email protected]> wrote:
>=20
> >While trying to think of a way to figure out the value of the=20
> formfield,=20
> >without calling the ctx.get_value function, I tried this in the=20
> interactive=20
> >shell:
> >
> >iMac:~ sheilaking$ python2.4
> >Python 2.4.1 (#2, Mar 31 2005, 00:05:10)
> >[GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] on darwin
> >OK, I was pretty sure it was just a string of the digits 0238, but I=20
> >changed line 113 in qaForms to the following:
> >
> >if formfield =3D=3D 'year':
> >    debug("ctx.locals.year=3D`%s`" % repr(ctx.locals.year))
> >fieldvalue =3D ctx.get_value(formfield)
> >
> >*note: debug is a function that simply writes out debugging statements=
=20
> to a=20
> >text file for me.
> >
> >Here is the output of the debug statement above:
> >
> >*** Wed Aug 17 03:45:13 2005
> >ctx.locals.year=3D`'0238'`
> >
> >So, it looks to me like it is simply a string of four digits, namely,=20
> 0238
> >and when I call ctx.get_value on the formfield "year", I get an=20
> exception.
>=20
> The above doesn't really fit with what's happening. Essentially
> ctx.get_value(name) looks like (with some irrelevent steps left out):
>=20
>     def get_value(name):
>         return eval(name, {}, self.locals.__dict__)
>=20
> Somehow "formfield" must be set to "0238", rather than "year".=20
>=20
> This is what should be happening:
>=20
>     >>> locals=3D{'year': '0238'}
>     >>> eval('year', {}, locals)
>     '0238'
>=20
> This is what it looks like is happening:
>=20
>     >>> eval('0238', {}, locals)
>     Traceback (most recent call last):
>       File "<stdin>", line 1, in ?
>       File "<string>", line 1
>         0238
>           ^
>     SyntaxError: invalid token
>=20

Of course, apart from the fact that the entered value is being evaluated =
by the Python interpreter (rather large security issue there...), the act=
ual error with 0238 is because Python interprets strings of integers star=
ting with zero (other than just zero) as octal, and 8 is not a valid octa=
l digit.=20

Two answers from the other side of the world...

Tim C