use double quotes in user messages

rest_framework/exceptions.py

@@ -95,7 +95,7 @@ class NotFound(APIException):
 
 class MethodNotAllowed(APIException):
     status_code = status.HTTP_405_METHOD_NOT_ALLOWED
-    default_detail = _("Method '{method}' not allowed.")
+    default_detail = _("Method \"{method}\" not allowed.")
 
     def __init__(self, method, detail=None):
         if detail is not None:
@@ -118,7 +118,7 @@ class NotAcceptable(APIException):
 
 class UnsupportedMediaType(APIException):
     status_code = status.HTTP_415_UNSUPPORTED_MEDIA_TYPE
-    default_detail = _("Unsupported media type '{media_type}' in request.")
+    default_detail = _("Unsupported media type \"{media_type}\" in request.")
 
     def __init__(self, media_type, detail=None):
         if detail is not None:

rest_framework/fields.py

@@ -612,7 +612,7 @@ class RegexField(CharField):
 
 class SlugField(CharField):
     default_error_messages = {
-        'invalid': _("Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens.")
+        'invalid': _("Enter a valid \"slug\" consisting of letters, numbers, underscores or hyphens.")
     }
 
     def __init__(self, **kwargs):

rest_framework/generics.py

@@ -120,12 +120,12 @@ class GenericAPIView(views.APIView):
             if page == 'last':
                 page_number = paginator.num_pages
             else:
-                raise NotFound(_("Choose a valid page number. Page numbers must be a whole number, or must be the string 'last'."))
+                raise NotFound(_("Choose a valid page number. Page numbers must be a whole number, or must be the string \"last\"."))
 
         try:
             page = paginator.page(page_number)
         except InvalidPage as exc:
-            error_format = _("Invalid page ({page_number}): {message}.")
+            error_format = _("Invalid page \"{page_number}\": {message}.")
             raise NotFound(error_format.format(
                 page_number=page_number, message=six.text_type(exc)
             ))

rest_framework/relations.py

@@ -129,7 +129,7 @@ class StringRelatedField(RelatedField):
 class PrimaryKeyRelatedField(RelatedField):
     default_error_messages = {
         'required': _("This field is required."),
-        'does_not_exist': _("Invalid pk '{pk_value}' - object does not exist."),
+        'does_not_exist': _("Invalid pk \"{pk_value}\" - object does not exist."),
         'incorrect_type': _("Incorrect type. Expected pk value, received {data_type}."),
     }
 

rest_framework/versioning.py

@@ -36,7 +36,7 @@ class AcceptHeaderVersioning(BaseVersioning):
     Host: example.com
     Accept: application/json; version=1.0
     """
-    invalid_version_message = _("Invalid version in 'Accept' header.")
+    invalid_version_message = _("Invalid version in \"Accept\" header.")
 
     def determine_version(self, request, *args, **kwargs):
         media_type = _MediaType(request.accepted_media_type)