add support for oneOf primitive types inside response arrays

Author: khiav223577

lib/grape-swagger/endpoint.rb

@@ -326,7 +326,12 @@ def build_response_schema(value)
       return { value[:as] => build_response_schema(value.except(:as)) } if value.include?(:as)
 
       if value[:type].is_a?(Array)
-        items = build_response_schema({ **value, type: value[:type].first })
+        items = if value[:type].size == 1
+                  build_response_schema({ **value, type: value[:type].first })
+                else
+                  { oneOf: value[:type].map { |type| build_response_schema({ **value, type: type }) } }
+                end
+
         return { type: 'array', items: items }
       end
 

spec/swagger_v2/api_swagger_v2_response_with_models_and_primitive_types_spec.rb

@@ -21,7 +21,8 @@ class ResponseApiModelsAndPrimitiveTypes < Grape::API
                { type: Array[String], as: :array_of_string_response },
                { type: Array[Float], as: :array_of_float_response },
                { type: Array[Hash], as: :array_of_hash_response },
-               { type: Array[Array[Float]], as: :array_of_array_of_float_response }
+               { type: Array[Array[Float]], as: :array_of_array_of_float_response },
+               { type: Array[Integer, String], as: :array_of_integer_or_string_response }
              ],
              failure: [
                { code: 400, message: 'NotFound', model: '' },
@@ -97,6 +98,15 @@ def app
                       'format' => 'float'
                     }
                   }
+                },
+                'array_of_integer_or_string_response' => {
+                  'type' => 'array',
+                  'items' => {
+                    'oneOf' => [
+                      { 'type' => 'integer', 'format' => 'int32' },
+                      { 'type' => 'string' }
+                    ]
+                  }
                 }
               }
             }