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UUIDField

Author:
bwhittington
Posted:
May 7, 2009
Language:
Python
Version:
1.0
Tags:
model field uuid
Score:
0 (after 0 ratings)

This snippet provides a uuid field for models, improving on the work in http://www.djangosnippets.org/snippets/335/

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from django.db.models import CharField

try:
    import uuid
except ImportError:
    from django.utils import uuid


class UUIDField(CharField) :
    
    def __init__(self, *args, **kwargs):
        kwargs['max_length'] = kwargs.get('max_length', 32 )
        CharField.__init__(self, *args, **kwargs)
    
    def pre_save(self, model_instance, add):
        if add :
            value=getattr(model_instance,self.attname)
            if not value:
                value = unicode(uuid.uuid4()).replace('-','')
            setattr(model_instance, self.attname, value)
            return value
        else:
            return super(CharField, self).pre_save(model_instance, add)

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