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			27 lines
		
	
	
		
			609 B
		
	
	
	
		
			Python
		
	
	
	
	
	
			
		
		
	
	
			27 lines
		
	
	
		
			609 B
		
	
	
	
		
			Python
		
	
	
	
	
	
| from django.db import models
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| 
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| 
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| class Poll(models.Model):
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|     question = models.CharField(max_length=200)
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| 
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| 
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| class Choice(models.Model):
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|     poll = models.ForeignKey(Poll, models.CASCADE)
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|     choice = models.CharField(max_length=200)
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| 
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| # A set of models with an inner one pointing to two outer ones.
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| 
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| 
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| class OuterA(models.Model):
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|     pass
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| 
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| 
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| class OuterB(models.Model):
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|     data = models.CharField(max_length=10)
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| 
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| 
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| class Inner(models.Model):
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|     first = models.ForeignKey(OuterA, models.CASCADE)
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|     # second would clash with the __second lookup.
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|     third = models.ForeignKey(OuterB, models.SET_NULL, null=True)
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