fix: update and reset value in triggerOnChange method

(cherry picked from commit 7d79cbf5bdd664e76fb90b994d0d4f5c257c0ed0)

frontend/src/components/Controls/Grid.vue

@@ -509,8 +509,7 @@ const deleteRows = () => {
 }
 
 function fieldChange(value, field, row) {
-  row[field.fieldname] = value
-  triggerOnChange(field.fieldname, row)
+  triggerOnChange(field.fieldname, value, row)
 }
 
 function getDefaultValue(defaultValue, fieldtype) {

frontend/src/components/FieldLayout/Field.vue

@@ -332,12 +332,10 @@ const getPlaceholder = (field) => {
 }
 
 function fieldChange(value, df) {
-  data.value[df.fieldname] = value
-
   if (isGridRow) {
-    triggerOnChange(df.fieldname, data.value)
+    triggerOnChange(df.fieldname, value, data.value)
   } else {
-    triggerOnChange(df.fieldname)
+    triggerOnChange(df.fieldname, value)
   }
 }
 

frontend/src/components/SidePanelLayout.vue

@@ -489,9 +489,7 @@ function parsedField(field) {
 async function fieldChange(value, df) {
   if (props.preview) return
 
-  document.doc[df.fieldname] = value
-
-  await triggerOnChange(df.fieldname)
+  await triggerOnChange(df.fieldname, value)
 
   document.save.submit(null, {
     onSuccess: () => {

frontend/src/data/document.js

@@ -117,20 +117,26 @@ export function useDocument(doctype, docname) {
     await trigger(handler)
   }
 
-  async function triggerOnChange(fieldname, row) {
+  async function triggerOnChange(fieldname, value, row) {
+    const oldValue = documentsCache[doctype][docname || ''].doc[fieldname]
+    documentsCache[doctype][docname || ''].doc[fieldname] = value
+
     const handler = async function () {
+      this.value = value
+      this.oldValue = oldValue
       if (row) {
         this.currentRowIdx = row.idx
-        this.value = row[fieldname]
-        this.oldValue = getOldValue(fieldname, row)
-      } else {
-        this.value = documentsCache[doctype][docname || ''].doc[fieldname]
-        this.oldValue = getOldValue(fieldname)
       }
       await this[fieldname]?.()
     }
 
-    await trigger(handler, row)
+    try {
+      await trigger(handler, row)
+    } catch (error) {
+      documentsCache[doctype][docname || ''].doc[fieldname] = oldValue
+      console.error(handler)
+      throw error
+    }
   }
 
   async function triggerOnRowAdd(row) {