Add PasswordField for compat

Author: jpadilla

rest_framework_jwt/compat.py

@@ -1,16 +1,24 @@
 import rest_framework
-
+from django.forms import widgets
 from distutils.version import StrictVersion
 
 
 if StrictVersion(rest_framework.VERSION) < StrictVersion('3.0.0'):
-    from rest_framework.serializers import Serializer
+    from rest_framework.serializers import Serializer, CharField
+
+    class PasswordField(CharField):
+        widget = widgets.PasswordInput
 else:
     class Serializer(rest_framework.serializers.Serializer):
         @property
         def object(self):
             return self.validated_data
 
+    class PasswordField(rest_framework.serializers.CharField):
+        style = {
+            'input_type': 'password'
+        }
+
 
 def get_user_model():
     try:

rest_framework_jwt/serializers.py

@@ -8,8 +8,10 @@
 from rest_framework import serializers
 from .compat import Serializer
 
-from rest_framework_jwt.compat import get_user_model, get_username_field
 from rest_framework_jwt.settings import api_settings
+from rest_framework_jwt.compat import (
+    get_user_model, get_username_field, PasswordField
+)
 
 
 User = get_user_model()
@@ -34,9 +36,7 @@ def __init__(self, *args, **kwargs):
         super(JSONWebTokenSerializer, self).__init__(*args, **kwargs)
 
         self.fields[self.username_field] = serializers.CharField()
-        self.fields['password'] = serializers.CharField(
-            style={'input_type': 'password'}
-        )
+        self.fields['password'] = PasswordField(write_only=True)
 
     @property
     def username_field(self):

tests/test_serializers.py

@@ -41,7 +41,7 @@ def test_empty_drf3(self):
         serializer = JSONWebTokenSerializer()
         expected = {
             'username': '',
-            'password': '',
+            'password': ''
         }
 
         self.assertEqual(serializer.data, expected)