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32 lines
900 B
Python
32 lines
900 B
Python
''' Models: Operation Argument in OSS. '''
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from django.db.models import CASCADE, ForeignKey, Model, PositiveIntegerField
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class Argument(Model):
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''' Operation Argument.'''
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operation = ForeignKey(
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verbose_name='Операция',
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to='oss.Operation',
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on_delete=CASCADE,
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related_name='arguments'
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)
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argument = ForeignKey(
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verbose_name='Аргумент',
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to='oss.Operation',
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on_delete=CASCADE,
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related_name='descendants'
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)
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order = PositiveIntegerField(
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verbose_name='Позиция',
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default=0,
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)
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class Meta:
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''' Model metadata. '''
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verbose_name = 'Аргумент'
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verbose_name_plural = 'Аргументы операций'
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unique_together = [['operation', 'argument']]
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def __str__(self) -> str:
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return f'{self.argument} -> {self.operation}'
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