From 9727542907def7ff54542ddf882659e83a66fbe9 Mon Sep 17 00:00:00 2001
From: Stephen Davies <steve9164@gmail.com>
Date: Thu, 29 Feb 2024 00:17:42 +1100
Subject: [PATCH] Discriminate between ChartableMixin models and References

---
 lib/ModelMixins/ChartableMixin.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/ModelMixins/ChartableMixin.ts b/lib/ModelMixins/ChartableMixin.ts
index b3884db2a77..b5da05a73a3 100644
--- a/lib/ModelMixins/ChartableMixin.ts
+++ b/lib/ModelMixins/ChartableMixin.ts
@@ -68,6 +68,10 @@ type BaseType = Model<ModelTraits>;
 
 function ChartableMixin<T extends AbstractConstructor<BaseType>>(Base: T) {
   abstract class ChartableMixin extends Base {
+    get hasChartableMixin() {
+      return true;
+    }
+
     get isChartable() {
       return true;
     }
@@ -85,7 +89,7 @@ namespace ChartableMixin {
   export interface Instance
     extends InstanceType<ReturnType<typeof ChartableMixin>> {}
   export function isMixedInto(model: any): model is Instance {
-    return model && model.isChartable;
+    return !!model?.hasChartableMixin;
   }
 }