fixed custom json encoders

redash/query_runner/cass.py

@@ -26,7 +26,7 @@ def generate_ssl_options_dict(protocol, cert_path=None):
     return ssl_options
 
 
-def json_encoder(dec, o):
+def custom_json_encoder(dec, o):
     if isinstance(o, sortedset):
         return list(o)
     return None

redash/query_runner/mongodb.py

@@ -42,7 +42,7 @@
 }
 
 
-def json_encoder(dec, o):
+def custom_json_encoder(dec, o):
     if isinstance(o, ObjectId):
         return str(o)
     elif isinstance(o, Timestamp):

redash/query_runner/pg.py

@@ -55,7 +55,7 @@
 }
 
 
-def json_encoder(dec, o):
+def custom_json_encoder(dec, o):
     if isinstance(o, Range):
         # From: https://github.com/psycopg/psycopg2/pull/779
         if o._bounds is None:

redash/utils/__init__.py

@@ -70,14 +70,15 @@ def generate_token(length):
     return "".join(rand.choice(chars) for x in range(length))
 
 
-json_encoders = [m.custom_json_encoder for m in sys.modules if hasattr(m, "custom_json_encoder")]
-
-
 class JSONEncoder(json.JSONEncoder):
     """Adapter for `json.dumps`."""
 
     def __init__(self, **kwargs):
-        self.encoders = json_encoders
+        self.encoders = [
+            m.custom_json_encoder
+            for m in sys.modules.values()
+            if hasattr(m, "custom_json_encoder")
+        ]
         super().__init__(**kwargs)
 
     def default(self, o):
@@ -111,7 +112,7 @@ def default(self, o):
         elif isinstance(o, bytes):
             result = binascii.hexlify(o).decode()
         else:
-            result = super(JSONEncoder, self).default(o)
+            result = super().default(o)
         return result