Ensure bitwise negation is supported on bitfield.

peewee.py

@@ -1417,6 +1417,8 @@ class BitwiseMixin(object):
 
 
 class BitwiseNegated(BitwiseMixin, WrappedNode):
+    op = OP.BITWISE_NEGATION
+
     def __invert__(self):
         return self.node
 

tests/fields.py

@@ -571,6 +571,12 @@ class TestBitFields(ModelTestCase):
         for i in range(1, 5):
             Bits.create(flags=i)
 
+        q = Bits.select((~Bits.flags & 2).alias('bn')).order_by(Bits.id)
+        self.assertEqual([b.bn for b in q], [2, 0, 0, 2])
+
+        q = Bits.select().where(Bits.flags & 2).order_by(Bits.id)
+        self.assertEqual([b.flags for b in q], [2, 3])
+
         Bits.update(flags=Bits.flags & ~2).execute()
         assertFlags([1, 0, 1, 4])
 

tests/sql.py

@@ -1019,6 +1019,17 @@ class TestSelectQuery(BaseTestCase):
             'SELECT "t1"."id" FROM "users" AS "t1" '
             'WHERE ("t1"."username" ILIKE ?)'), ['%abc%'])
 
+    def test_bitwise_ops(self):
+        query = User.select(User.c.id).where(User.c.id.bin_and(4))
+        self.assertSQL(query, (
+            'SELECT "t1"."id" FROM "users" AS "t1" '
+            'WHERE ("t1"."id" & ?)'), [4])
+
+        query = User.select(User.c.id).where(User.c.id.bin_or(1))
+        self.assertSQL(query, (
+            'SELECT "t1"."id" FROM "users" AS "t1" '
+            'WHERE ("t1"."id" | ?)'), [1])
+
 
 class TestInsertQuery(BaseTestCase):
     def test_insert_simple(self):