[Zope] multi-column sort with ZCatalog

[Michael Long]

Here is recipe for a python script that may help.

def multiSort(objects=None):
        """ Sort a list of objects by one or more attributes """
        if objects is None:
                objects = []
                return objects
        results = []
        sort_field = ['field1', 'field2', 'field3']

        for object in objects:
                row = [getattr(object, attr) for attr in sort_field]
                row.append(object)
                results.append(tuple(row))
        results.sort()
        return [row[-1] for row in results]


On Tue, 2003-05-13 at 08:23, Mark Nenadov wrote:
> Hello all,
> 
> I have a simple ZCatalog query with a sort_on and sort_order being
> passed to it.
> 
> Is there any way I can do the sort on multiple columns? This seems like
> an important feature. I've heard that is not possible, but I'm wondering
> if I am just missing something/getting wrong info.
> 
> I'm already looking into the Generic Sort External Method, but I'm
> wondering if there is some other way to do this?
> 
> Thanks,
> ~Mark
> 
> 
> 
> 
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-- 
Michael Long <mlong@datalong.com>