2011-10-14 02:51:33 +08:00
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from django.db import models
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2015-02-10 02:19:34 +08:00
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from django.utils import timezone
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2011-10-14 02:51:33 +08:00
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2009-10-29 22:32:01 +08:00
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def expensive_calculation():
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expensive_calculation.num_runs += 1
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2011-11-20 18:17:12 +08:00
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return timezone.now()
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2009-10-29 22:32:01 +08:00
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2013-11-03 12:36:09 +08:00
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2009-10-29 22:32:01 +08:00
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class Poll(models.Model):
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question = models.CharField(max_length=200)
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answer = models.CharField(max_length=200)
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pub_date = models.DateTimeField('date published', default=expensive_calculation)
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