fixing inconsistency between sqlite and postgres - exists() now returns True instead of just truthy values

Author: dantownsend

piccolo/query/methods/exists.py

@@ -25,7 +25,8 @@ def where(self, where: Combinable) -> Exists:
         return self
 
     async def response_handler(self, response) -> bool:
-        return response[0]["exists"]
+        # Convert to a bool - postgres returns True, and sqlite return 1.
+        return bool(response[0]["exists"])
 
     @property
     def querystrings(self) -> t.Sequence[QueryString]:

tests/table/test_exists.py

@@ -3,12 +3,9 @@
 
 
 class TestExists(DBTestCase):
-
     def test_exists(self):
         self.insert_rows()
 
-        response = Band.exists().where(
-            Band.name == 'Pythonistas'
-        ).run_sync()
+        response = Band.exists().where(Band.name == "Pythonistas").run_sync()
 
-        self.assertTrue(response == True)
+        self.assertTrue(response is True)