ah, that is due to the instrumentation of attributes. the "pages"
attribute will be created when you first access it normally, as
opposed to directly through the object's __dict__ where it doesnt
exist yet.
if you say j.pages or getattr(j, 'pages'), then itll magically appear
in the __dict__.
the attribute instrumentation assumes youre generally not dealing
with __dict__ directly, particularly for setting attributes, since
youd be skipping the instrumentation step. the instrumentation does
a little less now than it did in previous releases but still is
pretty important.
On Jun 19, 2006, at 5:54 PM, Arnar Birgisson wrote:
> On 6/19/06, Michael Bayer <[EMAIL PROTECTED]> wrote:
>> hey arnar -
>>
>> I cant reproduce this one with what youve given me. If i just set up
>> "jobs" and "pages" mappers (no page version stuff since its not in
>> the example), and dont compile anything, the creation of the Job()
>> object compiles the "jobs" mapper which properly hits the "pages"
>> backref.
>
> Hmm.. that is strange. This is a IPython session:
>
> In [1]: from jobs import *
>
> In [2]: j = Job('nr1')
>
> In [3]: dir(j)
> Out[3]:
> ['_AttributeManager__sa_attr_state',
> '_Job__sa_attr_state',
> '__class__',
> '__delattr__',
> '__dict__',
> '__doc__',
> '__getattribute__',
> '__hash__',
> '__init__',
> '__module__',
> '__new__',
> '__reduce__',
> '__reduce_ex__',
> '__repr__',
> '__setattr__',
> '__str__',
> '__weakref__',
> '_state',
> 'c',
> 'created',
> 'deleted',
> 'jobno']
>
> In [4]: 'pages' in dir(j)
> Out[4]: False
>
> In [5]: j2 = Job()
>
> In [6]: dir(j2)
> Out[6]:
> ['_Job__sa_attr_state',
> '__class__',
> '__delattr__',
> '__dict__',
> '__doc__',
> '__getattribute__',
> '__hash__',
> '__init__',
> '__module__',
> '__new__',
> '__reduce__',
> '__reduce_ex__',
> '__repr__',
> '__setattr__',
> '__str__',
> '__weakref__',
> '_state',
> 'c',
> 'created',
> 'deleted',
> 'jobno']
>
> In [7]: 'pages' in j2
> ----------------------------------------------------------------------
> -----
> exceptions.TypeError Traceback (most
> recent call last)
>
> /home/arnarb/workdir/softproof/webinterface/softproof/softproof/
> nontgmodel/<ipython
> console>
>
> TypeError: iterable argument required
>
> In [8]: 'pages' in dir(j2)
> Out[8]: False
>
> In [9]: p = Page()
>
> In [10]: 'pages' in dir(j2)
> Out[10]: True
>
>
>
> Only after first referring to Page I get the pages property on Job.
> The file jobs.py is attached. I must be doing something wrong because
> I pasted your test into a file and ran it, and j.pages showed up just
> fine.
>
> Arnar
> <jobs.py>
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