David Kyte wrote:
Do you know of any simple way of generating sequential numbers eg Order numbers in a persistant global way?
Thanks
Dave.
PS
Hard stuff is easy with zope, but some easy stuff can be really hard. In perl I would just lock a file, bump the value, and then return the value.
Used to be you could create a ZClass for your order and store a class attribute that could be "bumped" up everytime you create an instance of the class. However I found a security flaw in this, and DC eradicated it in a recent hotfix. You can however still do it from an external method AFAIK. Create an external method like so: def getNextNumber(ZClass): if hasattr(ZClass, 'sequence'): ZClass.setClassAttr('sequence', ZClass.getClassAttr('sequence') + 1) else: ZClass.setClassAttr('sequence', 1) return ZClass.getClassAttr('sequence') Then call it from the ZClass constructor method (which is usually a DTML method, but could be a Python script) and use the value it returns to either set the id or whatever property you are storing the order number into. I would like to see a secure version of this functionality exposed to DTML and TTW scripts, but DC seems a bit adverse to the idea. I will probably create a patch at some point anyhow and see if they like it. -- | Casey Duncan | Kaivo, Inc. | cduncan@kaivo.com `------------------>