Fix conn.update() broken by c6df537

Author: rtsisyk

src/tarantool/connection.py

@@ -273,7 +273,7 @@ def update(self, space_name, key, op_list, return_tuple=False):
         '''
         assert isinstance(key, (int, basestring))
 
-        request = RequestUpdate(space_name, key, op_list, return_tuple)
+        request = RequestUpdate(self, space_name, key, op_list, return_tuple)
         return self._send_request(request, space_name)
 
 

src/tarantool/request.py

@@ -247,8 +247,7 @@ def __init__(self, conn, space_name, key, op_list, return_tuple):    # pylint: d
 
         self._bytes = self.header(len(request_body)) + request_body
 
-    @classmethod
-    def pack_operations(cls, op_list):
+    def pack_operations(self, op_list):
         result = []
         for op in op_list:
             try:
@@ -260,7 +259,8 @@ def pack_operations(cls, op_list):
             except KeyError:
                 raise ValueError("Invalid operaction symbol '%s', expected one of %s"\
                                 %(op_symbol, ', '.join(["'%s'"%c for c in sorted(UPDATE_OPERATION_CODE.keys())])))
-            data = b"".join([struct_LB.pack(field_no, op_code), cls.pack_field(op_arg)])
+            op_arg = self.conn.schema.pack_value(op_arg)
+            data = b"".join([struct_LB.pack(field_no, op_code), self.pack_field(op_arg)])
             result.append(data)
         return b"".join(result)