Merge branch 'master' of https://github.com/browngraphicslab/Dash-Web

1 files changed, 3 insertions, 2 deletions

diff --git a/src/new_fields/ScriptField.ts b/src/new_fields/ScriptField.ts
index 6b2723663..b5ad4a7f6 100644
--- a/src/new_fields/ScriptField.ts
+++ b/src/new_fields/ScriptField.ts
@@ -103,7 +103,7 @@ export class ScriptField extends ObjectField {
     }
     public static CompileScript(script: string, params: object = {}, addReturn = false) {
         const compiled = CompileScript(script, {
-            params: { this: Doc.name, ...params },
+            params: { this: Doc.name, _last_: "any", ...params },
             typecheck: false,
             editable: true,
             addReturn: addReturn
@@ -124,8 +124,9 @@ export class ScriptField extends ObjectField {
 @scriptingGlobal
 @Deserializable("computed", deserializeScript)
 export class ComputedField extends ScriptField {
+    _lastComputedResult: any;
     //TODO maybe add an observable cache based on what is passed in for doc, considering there shouldn't really be that many possible values for doc
-    value = computedFn((doc: Doc) => this.script.run({ this: doc }, console.log).result);
+    value = computedFn((doc: Doc) => this._lastComputedResult = this.script.run({ this: doc, _last_: this._lastComputedResult }, console.log).result);
     public static MakeScript(script: string, params: object = {}, ) {
         const compiled = ScriptField.CompileScript(script, params, false);
         return compiled.compiled ? new ComputedField(compiled) : undefined;