[Zope] Override members values

[Garito]

Jonathan escribió:
>
> ----- Original Message ----- From: "Garito" <garito at sistes.net>
> To: "Lista Zope Internacional" <zope at zope.org>
> Sent: Monday, July 10, 2006 1:13 PM
> Subject: Re: [Zope] Override members values
>
>
>> Jonathan escribió:
>>>
>>> ----- Original Message ----- From: "Garito" <garito at sistes.net>
>>>> I try again:
>>>>
>>>> I have a property on the property manager called member1 with a 
>>>> value of "[/some/path]"
>>>>
>>>> User1 ask for this property. We calculate the real value for 
>>>> /some/path for these user: 1
>>>> User2 ask for this property. We calculate the real value for 
>>>> /some/path for these user: 2
>>>>
>>>> I have a property on the property manager called member2 with a 
>>>> value of "[a reference to the calculator]"
>>>>
>>>> A user ask for this property from his firefox. We calculate the 
>>>> real value for the reference for this browser: <result1>
>>>> Another user ask for this property from his ie. We calculate the 
>>>> real value for the reference for this browser: <result2>
>>>>
>>>> I would like to change the "accessor" for any property in my Zope 
>>>> product
>>>>
>>>> How can I?
>>>
>>>
>>> If I understand what you are trying to accomplish (of which I am not 
>>> completely sure)...then you could create a script that accesses the 
>>> object and returns a value based on the user agent string:
>>>
>>> eg.
>>>
>>> import string
>>> REQUEST = container.REQUEST
>>>
>>> targetObject = context.restrictedTraverse('/some/path/objId')
>>>
>>> if string.find(REQUEST['HTTP_USER_AGENT'], 'Firefox') != -1:
>>>   <do something with targetObject.attribute for Firefox users)
>>> elif string.find(REQUEST['HTTP_USER_AGENT'], 'MSIE') != -1:
>>>   <do something with targetObject.attribute for Internet Explorer 
>>> users)
>>> else:
>>>   <do something with targetObject.attribute for xxx users)
>>>
>>> Note: 'attribute' is whatever property you have defined for the object.
>>>
>>> hth
>>>
>>> Jonathan
>> Good Jonathan, something like this is on my mind but where I need to 
>> put a piece of code like this?
>>
>> __getattr__?
>> __bobo_traverse__?
>> another place?
>>
>> I work with __bobo_traverse__ for some purposes but I would like a 
>> place like __getattr__ because is where I go when I need an object's 
>> member (__hasattr__ too) and __bobo_traverse__ need to returns an 
>> object not a value
>>
>> __getattr__ some of you (I don't remember how exactly, sorry) have 
>> said is a member to use only if there are no other way and I'm a 
>> little scared for that
>
> I have no idea how your application is designed/structured, but one 
> possible solution is to create a python script and place it in the 
> path to the object you want to access.  For example, if the python 
> script is called pScript then:
>
> /some/path/pScript/objectId
>
> the python script 'pScript' will get executed and can access a 
> variable in REQUEST called 'traverse_subpath' - which is a list, and 
> in the above case has only 1 element which is a string containing 
> 'objectId'.  You can then use this string in the restrictedTraverse 
> command to get access to the object:
>
> REQUEST = container.REQUEST
> targetObject = context.restrictedTraverse('/some/path/some/folder/'+ 
> REQUEST['traverse_subpath'][0])
>
>
>
> Jonathan
>
>
Sure, but I would like to put it to act like

print Object.member

and the value is the result of your code

Where I put the code?

If I want to override the () member of a object I override __call__, if 
I want to override the str(object) I override __str__, right?

How can I override the object.<member> ?

-- 
Mis Cosas
http://blogs.sistes.net/Garito