33 lines
935 B
Python
33 lines
935 B
Python
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from django import forms
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from django.db.models import Field
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# https://docs.djangoproject.com/en/5.0/howto/custom-model-fields/
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class BitField(Field):
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description = 'Bit string'
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def __init__(self, *args, length=None, **kwargs):
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self.length = length
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super().__init__(*args, **kwargs)
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def deconstruct(self):
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name, path, args, kwargs = super().deconstruct()
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if self.length is not None:
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kwargs['length'] = self.length
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return name, path, args, kwargs
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def db_type(self, connection):
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if self.length is None:
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return 'bit'
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return 'bit(%d)' % self.length
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def formfield(self, **kwargs):
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return super().formfield(form_class=BitFormField, **kwargs)
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class BitFormField(forms.CharField):
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def to_python(self, value):
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if isinstance(value, str) and value == '':
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return None
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return super().to_python(value)
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