X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/1f3e067b075c8c20609c4ebbada2c543f2717082..0718c9d23a5791aa51bc11bba6a011fe9a8a616d:/librarian/dcparser.py?ds=inline

diff --git a/librarian/dcparser.py b/librarian/dcparser.py
index 245cf92..534cd27 100644
--- a/librarian/dcparser.py
+++ b/librarian/dcparser.py
@@ -126,7 +126,7 @@ class Field(object):
 
 class DCInfo(type):
     def __new__(meta, classname, bases, class_dict):
-        fields = class_dict['FIELDS']
+        fields = list(class_dict['FIELDS'])
 
         for base in bases[::-1]:
             if hasattr(base, 'FIELDS'):
@@ -134,9 +134,9 @@ class DCInfo(type):
                     try:
                         fields.index(field)
                     except ValueError:
-                        fields = (field,) + fields
+                        fields.insert(0, field)
 
-        class_dict['FIELDS'] = fields
+        class_dict['FIELDS'] = tuple(fields)
         return super(DCInfo, meta).__new__(meta, classname, bases, class_dict)