30 lines
878 B
Python
30 lines
878 B
Python
from django.db import models
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class ExchangeRate_name(models.Model):
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name = models.CharField(max_length=200, unique=True)
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def __str__(self):
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return self.name
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class ExchangeRate_date(models.Model):
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date = models.DateField('%Y-%m-%d', unique_for_date=True)
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def __str__(self):
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return str(self.date)
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class ExchangeRate(models.Model):
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name = models.ForeignKey(ExchangeRate_name)
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date = models.ForeignKey(ExchangeRate_date)
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exchange_rate_to_chf = models.DecimalField(max_digits=12,
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decimal_places=5)
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def exchange(_currency_id, _base_currency):
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rate = ExchangeRate.objects.filter(name=_currency_id).latest('date')
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return round(rate.exchange_rate_to_chf * _base_currency, 2)
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def __str__(self):
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return '{} {}'.format(self.exchange_rate_to_chf, self.name)
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