BUG#23617483: Fix parameter binding for unicode strings

Parameter binding using unicode strings was not supported.

This patch fixes this issue by converting unicode strings to bytes
when building the string scalar value.

A test was added for regression.

Author: nmariz

lib/mysqlx/expr.py

@@ -171,6 +171,8 @@ def build_int_scalar(i):
 
 
 def build_string_scalar(s):
+    if isinstance(s, unicode):
+        s = bytes(bytearray(s, "utf-8"))
     return Scalar(type=Scalar.V_STRING, v_string=Scalar.String(value=s))
 
 

tests/test_mysqlx_crud.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # MySQL Connector/Python - MySQL driver written in Python.
 # Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 
@@ -333,6 +334,26 @@ def test_parameter_binding(self):
         self.assertEqual(1, len(docs))
         self.assertEqual("Wilma", docs[0]["name"])
 
+    def test_unicode_parameter_binding(self):
+        collection_name = "collection_test"
+        collection = self.schema.create_collection(collection_name)
+        result = collection.add(
+            {"name": u"José", "age": 21},
+            {"name": u"João", "age": 28},
+            {"name": u"Célia", "age": 42},
+        ).execute()
+        result = collection.find("name == :name").bind("name", u"José") \
+                                                 .execute()
+        docs = result.fetch_all()
+        self.assertEqual(1, len(docs))
+        self.assertEqual(u"José", docs[0]["name"])
+
+        result = collection.find("$.name = :name").bind(u'{"name": "João"}') \
+                                                  .execute()
+        docs = result.fetch_all()
+        self.assertEqual(1, len(docs))
+        self.assertEqual(u"João", docs[0]["name"])
+
     def test_array_insert(self):
         collection_name = "collection_test"
         collection = self.schema.create_collection(collection_name)