[Zope] restrictedTraverse versus unrestrictedTraverse versus

[Max M]

nwingfield at che-llp.com wrote:

> Q1.  What is the difference between restrictedTraverse and
> unrestrictedTraverse?  When would one use the latter over the former?
> Q2.  In product code, what is the value in using
> 'self.restrictedTraverse(id)' or 'self.unrestrictedTraverse(id)' versus
> simpler notation, such as 'self[id]' or 'getattr(self, id)' ?


restrictedTraverse() can take a path as an argument, while self[id] only 
takes an id.

This is especially usefull if you want to make a reference to another 
object. For various reasons it is better to save the full path rather 
than just the id.

Ie. if you have a form with a multiple select box where you can choose 
from a list of objects found by a catalog query. Then it is useless to 
only save the id of the objects, as they can be positioned anywhere in 
the hierachy.

<select name="objects">
     <option="/path/to/obj1"Object 1</>
     <option="/position/of/obj2"Object 2</>
</select>


regards Max M