recommender system works

1 files changed, 2 insertions, 1 deletions

diff --git a/src/new_fields/RefField.ts b/src/new_fields/RefField.ts
index f7bea8c94..b6ef69750 100644
--- a/src/new_fields/RefField.ts
+++ b/src/new_fields/RefField.ts
@@ -1,6 +1,6 @@
 import { serializable, primitive, alias } from "serializr";
 import { Utils } from "../Utils";
-import { Id, HandleUpdate, ToScriptString } from "./FieldSymbols";
+import { Id, HandleUpdate, ToScriptString, ToString } from "./FieldSymbols";
 import { afterDocDeserialize } from "../client/util/SerializationHelper";
 
 export type FieldId = string;
@@ -17,4 +17,5 @@ export abstract class RefField {
     protected [HandleUpdate]?(diff: any): void | Promise<void>;
 
     abstract [ToScriptString](): string;
+    abstract [ToString](): string;
 }