Created
March 24, 2017 11:27
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| def validate_account_number(value): | |
| checksum = sum(int(value[i]) * (8-i) for i in range(7)) % 11 | |
| last_digit = int(value[-1]) | |
| if checksum in [0, 10]: | |
| c = 1 | |
| elif checksum == 1: | |
| c = 0 | |
| else: | |
| c = 11 - checksum | |
| if last_digit != c: | |
| raise ValidationError(self.message) |
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