26 lines
673 B
Python
26 lines
673 B
Python
from django.db import models
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class Category(models.Model):
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name = models.CharField(max_length=255, unique=True)
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def __str__(self):
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return self.name
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class Gauge(models.Model):
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serial_number = models.CharField(max_length=40)
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category = models.ForeignKey(Category)
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def __str__(self):
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return '{} ({})'.format(self.category, self.serial_number)
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class Meta:
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ordering = ['category']
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class Mesure(models.Model):
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moment = models.DateTimeField()
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value = models.DecimalField(max_digits=10, decimal_places=4)
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gauge = models.ForeignKey(Gauge)
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@property
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def category(self):
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return self.gauge.category |