----- Original Message ----- From: "Garito" <[EMAIL PROTECTED]>
To: "Lista Zope Internacional" <zope@zope.org>
Sent: Monday, July 10, 2006 1:13 PM
Subject: Re: [Zope] Override members values


Jonathan escribió:

----- Original Message ----- From: "Garito" <[EMAIL PROTECTED]>
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


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