feat: Show drafts in sidebar when viewing (#2820)

app/models/decorators/Field.ts

@@ -0,0 +1,19 @@
+const fields = new Map();
+
+export const getFieldsForModel = (target: any) => {
+  return fields.get(target.constructor.name);
+};
+
+/**
+ * A decorator that records this key as a serializable field on the model.
+ * Properties decorated with @Field will be included in API requests by default.
+ *
+ * @param target
+ * @param propertyKey
+ */
+const Field = <T>(target: any, propertyKey: keyof T) => {
+  const className = target.constructor.name;
+  fields.set(className, [...(fields.get(className) || []), propertyKey]);
+};
+
+export default Field;