Improve validator error handling

src/drf_yasg/codecs.py

@@ -12,22 +12,22 @@ from .app_settings import swagger_settings
 from .errors import SwaggerValidationError
 
 
-def _validate_flex(spec, codec):
+def _validate_flex(spec):
     from flex.core import parse as validate_flex
     from flex.exceptions import ValidationError
     try:
         validate_flex(spec)
     except ValidationError as ex:
-        raise_from(SwaggerValidationError(str(ex), 'flex', spec, codec), ex)
+        raise_from(SwaggerValidationError(str(ex)), ex)
 
 
-def _validate_swagger_spec_validator(spec, codec):
+def _validate_swagger_spec_validator(spec):
     from swagger_spec_validator.validator20 import validate_spec as validate_ssv
     from swagger_spec_validator.common import SwaggerValidationError as SSVErr
     try:
         validate_ssv(spec)
     except SSVErr as ex:
-        raise_from(SwaggerValidationError(str(ex), 'swagger_spec_validator', spec, codec), ex)
+        raise_from(SwaggerValidationError(str(ex)), ex)
 
 
 #:
@@ -61,10 +61,17 @@ class _OpenAPICodec(object):
             raise TypeError('Expected a `openapi.Swagger` instance')
 
         spec = self.generate_swagger_object(document)
+        errors = {}
         for validator in self.validators:
-            # validate a deepcopy of the spec to prevent the validator from messing with it
-            # for example, swagger_spec_validator adds an x-scope property to all references
-            VALIDATORS[validator](copy.deepcopy(spec), self)
+            try:
+                # validate a deepcopy of the spec to prevent the validator from messing with it
+                # for example, swagger_spec_validator adds an x-scope property to all references
+                VALIDATORS[validator](copy.deepcopy(spec))
+            except SwaggerValidationError as e:
+                errors[validator] = str(e)
+
+        if errors:
+            raise SwaggerValidationError("spec validation failed", errors, spec, self)
         return force_bytes(self._dump_dict(spec))
 
     def encode_error(self, err):

src/drf_yasg/errors.py

@@ -3,9 +3,9 @@ class SwaggerError(Exception):
 
 
 class SwaggerValidationError(SwaggerError):
-    def __init__(self, msg, validator_name, spec, source_codec, *args):
+    def __init__(self, msg, errors=None, spec=None, source_codec=None, *args):
         super(SwaggerValidationError, self).__init__(msg, *args)
-        self.validator_name = validator_name
+        self.errors = errors
         self.spec = spec
         self.source_codec = source_codec
 

src/drf_yasg/middleware.py

@@ -13,7 +13,7 @@ class SwaggerExceptionMiddleware(object):
 
     def process_exception(self, request, exception):
         if isinstance(exception, SwaggerValidationError):
-            err = {'errors': {exception.validator_name: str(exception)}}
+            err = {'errors': exception.errors, 'message': str(exception)}
             codec = exception.source_codec
             if isinstance(codec, _OpenAPICodec):
                 err = codec.encode_error(err)

src/drf_yasg/renderers.py

@@ -9,7 +9,7 @@ from .codecs import VALIDATORS, OpenAPICodecJson, OpenAPICodecYaml
 class _SpecRenderer(BaseRenderer):
     """Base class for text renderers. Handles encoding and validation."""
     charset = None
-    validators = ['ssv', 'flex']
+    validators = []
     codec_class = None
 
     @classmethod

src/drf_yasg/views.py

@@ -12,8 +12,9 @@ from rest_framework.views import APIView
 
 from .app_settings import swagger_settings
 from .generators import OpenAPISchemaGenerator
-from .renderers import OpenAPIRenderer, ReDocRenderer, SwaggerJSONRenderer, SwaggerUIRenderer, SwaggerYAMLRenderer, \
-    ReDocAlphaRenderer
+from .renderers import (
+    OpenAPIRenderer, ReDocAlphaRenderer, ReDocRenderer, SwaggerJSONRenderer, SwaggerUIRenderer, SwaggerYAMLRenderer
+)
 
 SPEC_RENDERERS = (SwaggerYAMLRenderer, SwaggerJSONRenderer, OpenAPIRenderer)
 UI_RENDERERS = {