35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
from django.db.models import Model, CharField, BooleanField, DecimalField, ForeignKey, CASCADE
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from django_countries.fields import CountryField
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class Currency(Model):
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name = CharField(max_length=255, unique=True)
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code = CharField(max_length=16, unique=True)
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symbol = CharField(max_length=8)
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base = BooleanField(default=False)
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rate = DecimalField(default=1, max_digits=30, decimal_places=10)
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def set_base(self):
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type(self).get_base().update(base=False)
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self.update(base=True)
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@classmethod
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def get_base(cls):
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return cls.objects.get(base=True)
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class TaxPolicy(Model):
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name = CharField(max_length=255, blank=True)
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default_rate = DecimalField(default=0, max_digits=10, decimal_places=5)
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def get_applicable_rate(self, country, reverse_charge=False):
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rule = self.taxrule_set.get(destination_country=country)
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if reverse_charge:
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return rule.tax_rate if not rule.reverse_charge else 0
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return rule.tax_rate
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class TaxRule(Model):
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policy = ForeignKey(TaxPolicy, on_delete=CASCADE)
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destination_country = CountryField()
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tax_rate = DecimalField(max_digits=10, decimal_places=5)
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reverse_charge = BooleanField(default=False)
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