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33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
from typing import List, Tuple, Union
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from django.db import models
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from django.db.backends.base.base import BaseDatabaseWrapper
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from django.db.models.sql.compiler import SQLCompiler
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from typing_extensions import override
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@models.Field.register_lookup
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class AndZero(models.Lookup[int]):
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lookup_name = "andz"
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@override
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def as_sql(
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self, compiler: SQLCompiler, connection: BaseDatabaseWrapper
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) -> Tuple[str, List[Union[str, int]]]: # nocoverage # currently only used in migrations
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lhs, lhs_params = self.process_lhs(compiler, connection)
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rhs, rhs_params = self.process_rhs(compiler, connection)
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return f"{lhs} & {rhs} = 0", lhs_params + rhs_params
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@models.Field.register_lookup
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class AndNonZero(models.Lookup[int]):
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lookup_name = "andnz"
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@override
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def as_sql(
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self, compiler: SQLCompiler, connection: BaseDatabaseWrapper
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) -> Tuple[str, List[Union[str, int]]]: # nocoverage # currently only used in migrations
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lhs, lhs_params = self.process_lhs(compiler, connection)
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rhs, rhs_params = self.process_rhs(compiler, connection)
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return f"{lhs} & {rhs} != 0", lhs_params + rhs_params
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