Hi Tristan,
Would you mind coming up with a small test case that shows this going
off the rails? From reading your description, the basic object setup
sounds like the following:
class Model(object):
def __str__(self):
return self.__unicode__()
class Poll(Model):
pass
However, that code complains about the lack of __unicode__ under
CPython or Jython with your changes in place, so I must be missing
something.
Charlie
On 9/21/07, Tristan King <[EMAIL PROTECTED]> wrote:
> Ok I've been working on the problem quoted at the end of this email and have
> come up with a solution. but i'm not sure what to make of it.
>
> Poll extends from Model and does not implement __str__ or __unicode__, but
> inherits __str__ from Model, which calls __unicode__, and __unicode__ from
> object. however, object.__unicode__ calls __str__, which in this case is
> model.__str__ and so the loop begins.
>
> of course this code works fine in CPython. so what's different?
> simple:
>
> [EMAIL PROTECTED]:~$ python
> Python 2.5.1 (r251:54863, May 2 2007, 16:56:35)
> [GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> hasattr(object, '__unicode__')
> False
> >>>
> [EMAIL PROTECTED]:~$ jython
> Jython 2.3a0 on java1.5.0_11
> Type "copyright", "credits" or "license" for more information.
> >>> hasattr(object, '__unicode__')
> True
> >>>
>
> so, applying the following patch to jython fixes the aforementioned problem.
> and running 'ant bugtests' shows no change
> Index: jython/src/org/python/core/PyObject.java
> ===================================================================
> --- jython/src/org/python/core/PyObject.java (revision
> 3484)
> +++ jython/src/org/python/core/PyObject.java (working
> copy)
> @@ -224,7 +224,7 @@
> }
> }
> - dict.__setitem__("__unicode__",new
> PyMethodDescr("__unicode__",PyObject.class,0,0,new
> exposed___unicode__(null,null)));
> + //dict.__setitem__("__unicode__",new
> PyMethodDescr("__unicode__", PyObject.class,0,0,new
> exposed___unicode__(null,null)));
> class exposed___init__ extends PyBuiltinMethod {
> exposed___init__(PyObject self,PyBuiltinFunction.Info info) {
>
> My question is. Why, if in CPython object.__unicode__ doesn't exist, why
> does it in jython?
>
>
> On 20/09/2007, at 7:30 PM, Tristan King wrote:
>
> I've been working on getting the django tutorial to work, and got up to:
> ---------------
> # objects.all() displays all the polls in the database.
> Poll.objects.all()
> [<Poll: Poll object>]
> --------------
> before writing this (i'm about to pack it in for the day), which threw me a
> nasty error:
> ..........
> File
> "/usr/local/share/jython/Lib/django/db/models/base.py",
> line 101, in __str__
> File
> "/usr/local/share/jython/Lib/django/utils/encoding.py",
> line 37, in force_unicode
> File
> "/usr/local/share/jython/Lib/django/db/models/base.py",
> line 101, in __str__
> File
> "/usr/local/share/jython/Lib/django/utils/encoding.py",
> line 37, in force_unicode
> java.lang.StackOverflowError: java.lang.StackOverflowError
>
>
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