Fix TypeError by patching register_default_jsonb from psycopg2 (#350)

Author: srprash

aws_xray_sdk/ext/psycopg2/patch.py

@@ -7,7 +7,6 @@
 
 
 def patch():
-
     wrapt.wrap_function_wrapper(
         'psycopg2',
         'connect',
@@ -24,11 +23,16 @@ def patch():
         _xray_register_type_fix
     )
 
+    wrapt.wrap_function_wrapper(
+        'psycopg2.extras',
+        'register_default_jsonb',
+        _xray_register_default_jsonb_fix
+    )
 
-def _xray_traced_connect(wrapped, instance, args, kwargs):
 
+def _xray_traced_connect(wrapped, instance, args, kwargs):
     conn = wrapped(*args, **kwargs)
-    parameterized_dsn = { c[0]: c[-1] for c in map(methodcaller('split', '='), conn.dsn.split(' '))}
+    parameterized_dsn = {c[0]: c[-1] for c in map(methodcaller('split', '='), conn.dsn.split(' '))}
     meta = {
         'database_type': 'PostgreSQL',
         'url': 'postgresql://{}@{}:{}/{}'.format(
@@ -44,10 +48,22 @@ def _xray_traced_connect(wrapped, instance, args, kwargs):
 
     return XRayTracedConn(conn, meta)
 
+
 def _xray_register_type_fix(wrapped, instance, args, kwargs):
     """Send the actual connection or curser to register type."""
     our_args = list(copy.copy(args))
     if len(our_args) == 2 and isinstance(our_args[1], (XRayTracedConn, XRayTracedCursor)):
         our_args[1] = our_args[1].__wrapped__
 
     return wrapped(*our_args, **kwargs)
+
+
+def _xray_register_default_jsonb_fix(wrapped, instance, args, kwargs):
+    our_kwargs = dict()
+    for key, value in kwargs.items():
+        if key == "conn_or_curs" and isinstance(value, (XRayTracedConn, XRayTracedCursor)):
+            # unwrap the connection or cursor to be sent to register_default_jsonb
+            value = value.__wrapped__
+        our_kwargs[key] = value
+
+    return wrapped(*args, **our_kwargs)

tests/ext/psycopg2/test_psycopg2.py

@@ -173,3 +173,17 @@ def test_query_as_string():
         test_sql = psycopg2.sql.Identifier('test')
         assert test_sql.as_string(conn)
         assert test_sql.as_string(conn.cursor())
+
+
+def test_register_default_jsonb():
+    with testing.postgresql.Postgresql() as postgresql:
+        url = postgresql.url()
+        dsn = postgresql.dsn()
+        conn = psycopg2.connect('dbname=' + dsn['database'] +
+                                ' password=mypassword' +
+                                ' host=' + dsn['host'] +
+                                ' port=' + str(dsn['port']) +
+                                ' user=' + dsn['user'])
+
+        assert psycopg2.extras.register_default_jsonb(conn_or_curs=conn, loads=lambda x: x)
+        assert psycopg2.extras.register_default_jsonb(conn_or_curs=conn.cursor(), loads=lambda x: x)