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from django.db import models
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class Event(models.Model):
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dt = models.DateTimeField()
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class MaybeEvent(models.Model):
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dt = models.DateTimeField(blank=True, null=True)
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class Session(models.Model):
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name = models.CharField(max_length=20)
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class SessionEvent(models.Model):
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dt = models.DateTimeField()
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session = models.ForeignKey(Session, related_name='events')
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class Timestamp(models.Model):
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created = models.DateTimeField(auto_now_add=True)
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updated = models.DateTimeField(auto_now=True)