From ff4ca9fe664531ee54b63fe660641bfe1002fef4 Mon Sep 17 00:00:00 2001
From: Shariq Ansari <sharique.rik@gmail.com>
Date: Thu, 25 Sep 2025 21:41:02 +0530
Subject: [PATCH] fix: add validation for mandatory fields in useDocument

(cherry picked from commit dbcda4c548270f4b030d819857b1f393fdaadecb)
---
 frontend/src/data/document.js | 42 ++++++++++++++++++++++++++++++++++-
 frontend/src/utils/index.js   | 30 +++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/frontend/src/data/document.js b/frontend/src/data/document.js
index 5a970f20..eeb410aa 100644
--- a/frontend/src/data/document.js
+++ b/frontend/src/data/document.js
@@ -1,7 +1,8 @@
 import { getScript } from '@/data/script'
 import { globalStore } from '@/stores/global'
+import { getMeta } from '@/stores/meta'
 import { showSettings, activeSettingsPage } from '@/composables/settings'
-import { runSequentially, parseAssignees } from '@/utils'
+import { runSequentially, parseAssignees, evaluateExpression } from '@/utils'
 import { createDocumentResource, createResource, toast } from 'frappe-ui'
 import { ref, reactive } from 'vue'
 
@@ -11,6 +12,7 @@ const assigneesCache = {}
 
 export function useDocument(doctype, docname) {
   const { setupScript, scripts } = getScript(doctype)
+  const meta = getMeta(doctype)
 
   documentsCache[doctype] = documentsCache[doctype] || {}
 
@@ -37,6 +39,7 @@ export function useDocument(doctype, docname) {
           }
         },
         setValue: {
+          validate,
           onSuccess: () => {
             triggerOnSave()
             toast.success(__('Document updated successfully'))
@@ -152,6 +155,42 @@ export function useDocument(doctype, docname) {
     return []
   }
 
+  function validate(d) {
+    checkMandatory(d.doc || d.fieldname)
+  }
+
+  function checkMandatory(doc) {
+    let fields = meta?.getFields() || []
+
+    if (!fields || fields.length === 0) return
+
+    let missingFields = []
+
+    fields.forEach((df) => {
+      let parent = meta?.doctypeMeta?.[df.parent] || null
+      if (evaluateExpression(df.mandatory_depends_on, doc, parent)) {
+        const value = doc[df.fieldname]
+        if (
+          value === undefined ||
+          value === null ||
+          (typeof value === 'string' && value.trim() === '') ||
+          (Array.isArray(value) && value.length === 0)
+        ) {
+          missingFields.push(df.label || df.fieldname)
+        }
+      }
+    })
+
+    if (missingFields.length > 0) {
+      toast.error(
+        __('Mandatory fields required: {0}', [missingFields.join(', ')]),
+      )
+      throw new Error(
+        __('Mandatory fields required: {0}', [missingFields.join(', ')]),
+      )
+    }
+  }
+
   async function triggerOnLoad() {
     const handler = async function () {
       await (this.onLoad?.() || this.on_load?.() || this.onload?.())
@@ -280,6 +319,7 @@ export function useDocument(doctype, docname) {
     assignees: assigneesCache[doctype][docname || ''],
     scripts,
     error,
+    validate,
     getControllers,
     triggerOnLoad,
     triggerOnBeforeCreate,
diff --git a/frontend/src/utils/index.js b/frontend/src/utils/index.js
index 14b5ade9..4f7370c2 100644
--- a/frontend/src/utils/index.js
+++ b/frontend/src/utils/index.js
@@ -421,6 +421,36 @@ export function evaluateDependsOnValue(expression, doc) {
   return out
 }
 
+export function evaluateExpression(expression, doc, parent) {
+  if (!expression) return false
+  if (!doc) return false
+
+  let out = null
+  if (typeof expression === 'boolean') {
+    out = expression
+  } else if (typeof expression === 'function') {
+    out = expression(doc)
+  } else if (expression.substr(0, 5) == 'eval:') {
+    try {
+      out = _eval(expression.substr(5), { doc, parent })
+      if (parent && parent.istable && expression.includes('is_submittable')) {
+        out = true
+      }
+    } catch (e) {
+      out = true
+    }
+  } else {
+    let value = doc[expression]
+    if (Array.isArray(value)) {
+      out = !!value.length
+    } else {
+      out = !!value
+    }
+  }
+
+  return out
+}
+
 export function convertSize(size) {
   const units = ['B', 'KB', 'MB', 'GB', 'TB']
   let unitIndex = 0