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from __future__ import unicode_literals
from django.utils.encoding import python_2_unicode_compatible
"""
Model for testing arithmetic expressions.
"""
from django.db import models
@python_2_unicode_compatible
class Number(models.Model):
integer = models.IntegerField(db_column='the_integer')
float = models.FloatField(null=True, db_column='the_float')
def __str__(self):
return '%i, %.3f' % (self.integer, self.float)
class Experiment(models.Model):
name = models.CharField(max_length=24)
assigned = models.DateField()
completed = models.DateField()
start = models.DateTimeField()
end = models.DateTimeField()
class Meta:
ordering = ('name',)
def duration(self):
return self.end - self.start
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