/usr/lib/python3/dist-packages/bitfield/query.py is in python3-django-bitfield 1.9.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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from bitfield.types import Bit, BitHandler
class BitQueryLookupWrapper(object):
def __init__(self, alias, column, bit):
self.table_alias = alias
self.column = column
self.bit = bit
def as_sql(self, qn, connection=None):
"""
Create the proper SQL fragment. This inserts something like
"(T0.flags & value) != 0".
This will be called by Where.as_sql()
"""
if self.bit:
return ("(%s.%s | %d)" % (qn(self.table_alias), qn(self.column), self.bit.mask),
[])
return ("(%s.%s & %d)" % (qn(self.table_alias), qn(self.column), self.bit.mask),
[])
try:
# Django 1.7+
from django.db.models.lookups import Exact
class BitQueryLookupWrapper(Exact): # NOQA
def process_lhs(self, qn, connection, lhs=None):
lhs_sql, params = super(BitQueryLookupWrapper, self).process_lhs(
qn, connection, lhs)
if self.rhs:
lhs_sql = lhs_sql + ' & %s'
else:
lhs_sql = lhs_sql + ' | %s'
params.extend(self.get_db_prep_lookup(self.rhs, connection)[1])
return lhs_sql, params
def get_db_prep_lookup(self, value, connection, prepared=False):
v = value.mask if isinstance(value, (BitHandler, Bit)) else value
return super(BitQueryLookupWrapper, self).get_db_prep_lookup(v, connection)
def get_prep_lookup(self):
return self.rhs
except ImportError:
pass
class BitQuerySaveWrapper(BitQueryLookupWrapper):
def as_sql(self, qn, connection):
"""
Create the proper SQL fragment. This inserts something like
"(T0.flags & value) != 0".
This will be called by Where.as_sql()
"""
engine = connection.settings_dict['ENGINE'].rsplit('.', -1)[-1]
if engine.startswith('postgres'):
XOR_OPERATOR = '#'
elif engine.startswith('sqlite'):
raise NotImplementedError
else:
XOR_OPERATOR = '^'
if self.bit:
return ("%s.%s | %d" % (qn(self.table_alias), qn(self.column), self.bit.mask),
[])
return ("%s.%s %s %d" % (qn(self.table_alias), qn(self.column), XOR_OPERATOR, self.bit.mask),
[])
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