Force descriptions to be str objects

Fixes #159

src/drf_yasg/inspectors/base.py

@@ -1,12 +1,11 @@
 import inspect
 import logging
 
-from django.utils.encoding import force_text
 from rest_framework import serializers
 from rest_framework.utils import encoders, json
 
 from .. import openapi
-from ..utils import decimal_as_float, is_list_view
+from ..utils import decimal_as_float, force_real_str, is_list_view
 
 #: Sentinel value that inspectors must return to signal that they do not know how to handle an object
 NotHandled = object()
@@ -196,9 +195,9 @@ class FieldInspector(BaseInspector):
         """
         assert swagger_object_type in (openapi.Schema, openapi.Parameter, openapi.Items)
         assert not isinstance(field, openapi.SwaggerDict), "passed field is already a SwaggerDict object"
-        title = force_text(field.label) if field.label else None
+        title = force_real_str(field.label) if field.label else None
         title = title if swagger_object_type == openapi.Schema else None  # only Schema has title
-        description = force_text(field.help_text) if field.help_text else None
+        description = force_real_str(field.help_text) if field.help_text else None
         description = description if swagger_object_type != openapi.Items else None  # Items has no description either
 
         def SwaggerType(existing_object=None, **instance_kwargs):

src/drf_yasg/inspectors/query.py

@@ -3,6 +3,8 @@ from collections import OrderedDict
 import coreschema
 from rest_framework.pagination import CursorPagination, LimitOffsetPagination, PageNumberPagination
 
+from drf_yasg.utils import force_real_str
+
 from .. import openapi
 from .base import FilterInspector, PaginatorInspector
 
@@ -48,7 +50,7 @@ class CoreAPICompatInspector(PaginatorInspector, FilterInspector):
             in_=location_to_in[field.location],
             type=coreapi_types.get(type(field.schema), openapi.TYPE_STRING),
             required=field.required,
-            description=field.schema.description if field.schema else None,
+            description=force_real_str(field.schema.description) if field.schema else None,
         )
 
 

src/drf_yasg/inspectors/view.py

@@ -8,7 +8,7 @@ from rest_framework.status import is_success
 from .. import openapi
 from ..errors import SwaggerGenerationError
 from ..utils import (
-    force_serializer_instance, get_consumes, get_produces, guess_response_status, is_list_view, no_body,
+    force_real_str, force_serializer_instance, get_consumes, get_produces, guess_response_status, is_list_view, no_body,
     param_list_to_odict
 )
 from .base import ViewInspector
@@ -42,7 +42,7 @@ class SwaggerAutoSchema(ViewInspector):
 
         return openapi.Operation(
             operation_id=operation_id,
-            description=description,
+            description=force_real_str(description),
             responses=responses,
             parameters=parameters,
             consumes=consumes,
@@ -246,7 +246,7 @@ class SwaggerAutoSchema(ViewInspector):
         for sc, serializer in response_serializers.items():
             if isinstance(serializer, str):
                 response = openapi.Response(
-                    description=serializer
+                    description=force_real_str(serializer)
                 )
             elif not serializer:
                 continue