Wyatt Baldwin wrote:
>> def jsontest(self):
>> @pylons.decorators.jsonify
>> def _jsonout(d):
>> return dict(d)
>> return _jsonout({'spamids':[1,2,3], 'bigmess':[4],
>> 'regular_mail':[5,6,7]})
>>
>> I get AttributeError: 'dict' object has no attribute '_py_object'
>
> I think that's because the @jsonify decorator expects the decorated
> function to have a `self` arg, so `def _jsonout(self, d): ...` should
> work.
Unfortunately it doesn't, I def _jsonout(self, d): and I get "TypeError:
<lambda>() takes exactly 2 arguments (1 given)" this time.
>You might want to refactor `_jsonout` into a method in your base
> controller,
True, but another place, namely lib/, may be a good place to use such
decorators as well.
> then `return self._jsonout(obj_to_jsonify)`.
Hmm aren't conditionally existing variables (self._jsonout) evil?
> Also, you're converting `d` to a `dict` even though it's already a
> `dict`, which isn't the problem here, but which is unnecessary.
True, but that was just an example, I try to get decorator working first
and foremost.
<snip>
> You'd need to do `return _jsonout(self, {'spamids':[1,2,3], ...)`, but
> I'd still recommend making `_jsonout` a reusable method (which also
> avoids creating a new decorated function on every request).
OK, but suppose I want to @jsonify that reusable method in the code put
in lib/. I can't do it:
IDLE 2.6.1
>>> import pylons.decorators
>>> @pylons.decorators.jsonify
def _jsonout(self, parlist):
return dict(parlist)
>>> self=None
>>> _jsonout(self,[4,5,6])
Traceback (most recent call last):
File "<pyshell#6>", line 1, in <module>
_jsonout(self,[4,5,6])
File "<string>", line 1, in <lambda>
File
"c:\python26\lib\site-packages\pylons-0.9.7rc4-py2.6.egg\pylons\decorators\__init__.py",
line 34, in jsonify
self._py_object.response.headers['Content-Type'] = 'application/json'
AttributeError: 'NoneType' object has no attribute '_py_object'
>>>
>>>
>>>
>>> self=[]
>>> @pylons.decorators.jsonify
def _jsonout(self, parlist):
return dict(parlist)
>>> _jsonout(self,[4,5,6])
Traceback (most recent call last):
File "<pyshell#13>", line 1, in <module>
_jsonout(self,[4,5,6])
File "<string>", line 1, in <lambda>
File
"c:\python26\lib\site-packages\pylons-0.9.7rc4-py2.6.egg\pylons\decorators\__init__.py",
line 34, in jsonify
self._py_object.response.headers['Content-Type'] = 'application/json'
AttributeError: 'list' object has no attribute '_py_object'
It seems that the only place where I can use pylons decorators is a
controller method.
But if I take the path advocated by some people on this forum, namely
dividing the app into "core functionality" modules and controllers being
mainly interface to that core (I sure would like to do it that way),
there is a good reason to use pylons decorators in places other than
controller methods.
So the question is, how can I do that? Do I have to inherit from
BaseController in the code in lib/ just to use pylons decorators?
Regards,
mk
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