Fixed schema for UUIDField in SimpleMetadata. (#5872)

* fix schema for UUIDField

* Add unit test for d4c8f2db

rest_framework/metadata.py

@@ -40,6 +40,7 @@ class SimpleMetadata(BaseMetadata):
         serializers.BooleanField: 'boolean',
         serializers.NullBooleanField: 'boolean',
         serializers.CharField: 'string',
+        serializers.UUIDField: 'string',
         serializers.URLField: 'url',
         serializers.EmailField: 'email',
         serializers.RegexField: 'regex',

tests/test_metadata.py

@@ -84,6 +84,7 @@ class TestMetadata:
                 )
             )
             nested_field = NestedField()
+            uuid_field = serializers.UUIDField(label="UUID field")
 
         class ExampleView(views.APIView):
             """Example view."""
@@ -172,7 +173,13 @@ class TestMetadata:
                                 'label': 'B'
                             }
                         }
-                    }
+                    },
+                    'uuid_field': {
+                        "type": "string",
+                        "required": True,
+                        "read_only": False,
+                        "label": "UUID field",
+                    },
                 }
             }
         }