| 1 | from django.db import models |
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| 2 | |
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| 3 | class UUIDField(models.CharField): |
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| 4 | def __init__(self, version=None, node=None, clock_seq=None, namespace=None, name=None, **kwargs): |
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| 5 | kwargs['maxlength'] = 36 |
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| 6 | kwargs['blank'] = True |
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| 7 | self.version = version |
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| 8 | if version==1: |
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| 9 | self.node, self.clock_seq = node, clock_seq |
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| 10 | elif version==3 or version==5: |
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| 11 | self.namespace, self.name = namespace, name |
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| 12 | models.CharField.__init__(self, **kwargs) |
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| 13 | |
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| 14 | def get_internal_type(self): |
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| 15 | return "CharField" |
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| 16 | |
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| 17 | def pre_save(self, model_instance, add): |
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| 18 | if add: |
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| 19 | import sys |
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| 20 | if sys.version_info < (2,5): |
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| 21 | try: |
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| 22 | from django.utils import uuid |
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| 23 | except ImportError: |
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| 24 | import uuid |
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| 25 | else: |
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| 26 | import uuid |
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| 27 | if not self.version or self.version==4: |
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| 28 | return unicode(uuid.uuid4()) |
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| 29 | elif self.version==1: |
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| 30 | return unicode(uuid.uuid1(self.node, self.clock_seq)) |
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| 31 | elif self.version==3: |
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| 32 | return unicode(uuid.uuid3(self.namespace, self.name)) |
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| 33 | elif self.version==5: |
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| 34 | return unicode(uuid.uuid5(self.namespace, self.name)) |
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| 35 | else: |
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| 36 | return super(UUIDField, self).pre_save(model_instance, add) |
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| 37 | |
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