feat(swagger-object): Export primitive of array as primitive instead as ref

Author: MathiusD

src/swagger/builder.cr

@@ -111,7 +111,11 @@ module Swagger
       if object.type == "array"
         if items = object.items
           if items.is_a?(String)
-            schema_items = Objects::Schema.use_reference(items)
+            if [ "string", "integer", "number", "boolean" ].includes?(items)
+              schema_items = Objects::Schema.default_type(items)
+            else
+              schema_items = Objects::Schema.use_reference(items)
+            end
           else
             schema_items = build_schema(items)
           end

src/swagger/objects/schema.cr

@@ -13,6 +13,10 @@ module Swagger::Objects
       new(ref: "#/components/schemas/#{name}")
     end
 
+    def self.default_type(type : String)
+      new(type: type)
+    end
+
     # See https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.3.md#dataTypes
     getter type : String? = nil
     getter format : String? = nil