[Zope-CMF] sum up member properties for specific time period

[Dieter Maurer]

Norman Khine wrote at 2003-6-2 19:15 +0100:
 > you're saying that i should store these data within a database rather than
 > the ZODB? or am i wrong?

No, I do not (want to) say that.

Instead, I mean: you must store the historical data somewhere (this
can be the ZODB or a relational database or a file).

While historical data is maintained by an undoable storage (until packing
time), it is difficult to access it and it is lost before the
packing time.

 > what i have is that i have setup some additional properties to the Member on
 > the CMF, this includes Join_Date, Office_Location etc, so when a user joins
 > the form registers the Date & Time and also it asks them to select from a
 > drop-down box the Office_Location(this is stored as 1, 2, 3 - where 1 is the
 > Head Office, 2 is Editorial, and 3 is Developmet) - all this is stored on
 > the ZODB and if I use the how-to http://www.zopelabs.com/cookbook/1048010784
 > i can see all the data that I need to analyse, BUT don't have the know-how
 > of how to achieve this ;^(

Either, you use the ZCatalog (as someone else already suggested;
see the Zope Book (2.6 edition - online) for details)
or you use a Python Script, enumerate all members and sort
them into bins (categories) as required.

 > also, looking at the http://www.zopelabs.com/cookbook/1054497272 we can
 > count how many members we have? so isn't there a way to group these by
 > Join_Date property?

Do it with a Python Script (Zope does not have something like the
"group by" clause of SQL).


Dieter