fixed add and edit expense issue

lib/controller/expense/add_expense_controller.dart

@@ -394,16 +394,24 @@ class AddExpenseController extends GetxController {
     }
   }
 
-  Future<bool> _submitToApi(Map<String, dynamic> payload) async {
+  Future<bool> _submitToApi(Map<String, dynamic>? payload) async {
+    if (payload == null) {
+      _errorSnackbar("Payload is empty. Cannot submit.");
+      return false;
+    }
+
+    try {
       if (isEditMode.value && editingExpenseId != null) {
-      return ApiService.editExpenseApi(
+        // Edit existing expense
+        return await ApiService.editExpenseApi(
           expenseId: editingExpenseId!,
           payload: payload,
         );
-    }
+      } else {
-    return ApiService.createExpenseApi(
+        // Create new expense
+        return await ApiService.createExpenseApi(
           projectId: payload['projectId'],
-      expensesTypeId: payload['expensesTypeId'],
+          expensesTypeId: payload['expenseCategoryId'],
           paymentModeId: payload['paymentModeId'],
           paidById: payload['paidById'],
           transactionDate: DateTime.parse(payload['transactionDate']),
@@ -416,25 +424,56 @@ class AddExpenseController extends GetxController {
           billAttachments: payload['billAttachments'],
         );
       }
+    } catch (e) {
+      _errorSnackbar("Failed to submit expense: $e");
+      return false;
+    }
+  }
 
-  Future<Map<String, dynamic>> _buildExpensePayload() async {
+  Future<Map<String, dynamic>?> _buildExpensePayload() async {
     final now = DateTime.now();
 
+    // --- Get IDs safely ---
+    final projectId = projectsMap[selectedProject.value];
+    final expenseType = selectedExpenseType.value;
+    final paymentMode = selectedPaymentMode.value;
+    final paidBy = selectedPaidBy.value;
+
+    // --- Validate essential fields ---
+    if (projectId == null) {
+      _errorSnackbar("Project not selected or invalid");
+      return null;
+    }
+    if (expenseType == null) {
+      _errorSnackbar("Expense type not selected");
+      return null;
+    }
+    if (paymentMode == null) {
+      _errorSnackbar("Payment mode not selected");
+      return null;
+    }
+    if (paidBy == null) {
+      _errorSnackbar("Paid By not selected");
+      return null;
+    }
+
+    // --- Process existing attachments (for edit mode) ---
     final existingPayload = isEditMode.value
         ? existingAttachments
             .map((e) => {
                   "documentId": e['documentId'],
-                  "fileName": e['fileName'],
+                  "fileName": e['fileName'] ?? "",
-                  "contentType": e['contentType'],
+                  "contentType": e['contentType'] ?? "",
                   "fileSize": 0,
                   "description": "",
-                  "url": e['url'],
+                  "url": e['url'] ?? "",
                   "isActive": e['isActive'] ?? true,
                   "base64Data": "",
                 })
             .toList()
         : <Map<String, dynamic>>[];
 
+    // --- Process new attachments ---
     final newPayload = await Future.wait(
       attachments.map((file) async {
         final bytes = await file.readAsBytes();
@@ -449,31 +488,29 @@ class AddExpenseController extends GetxController {
       }),
     );
 
-    final type = selectedExpenseType.value!;
+    // --- Build final payload ---
-
+    final payload = {
-    return {
       if (isEditMode.value && editingExpenseId != null) "id": editingExpenseId,
-      "projectId": projectsMap[selectedProject.value]!,
+      "projectId": projectId,
-      "expenseCategoryId": type.id,
+      "expenseCategoryId": expenseType.id,
-      "paymentModeId": selectedPaymentMode.value!.id,
+      "paymentModeId": paymentMode.id,
-      "paidById": selectedPaidBy.value!.id,
+      "paidById": paidBy.id,
       "transactionDate":
           (selectedTransactionDate.value ?? now).toUtc().toIso8601String(),
-      "transactionId": transactionIdController.text,
+      "transactionId": transactionIdController.text.trim(),
-      "description": descriptionController.text,
+      "description": descriptionController.text.trim(),
-      "location": locationController.text,
+      "location": locationController.text.trim(),
-      "supplerName": supplierController.text,
+      "supplerName": supplierController.text.trim(),
-      "amount": double.parse(amountController.text.trim()),
+      "amount": double.tryParse(amountController.text.trim()) ?? 0,
-      "noOfPersons": type.noOfPersonsRequired == true
+      "noOfPersons": expenseType.noOfPersonsRequired == true
           ? int.tryParse(noOfPersonsController.text.trim()) ?? 0
           : 0,
-      "billAttachments": [
+      "billAttachments": [...existingPayload, ...newPayload].isEmpty
-        ...existingPayload,
-        ...newPayload,
-      ].isEmpty
           ? null
           : [...existingPayload, ...newPayload],
     };
+
+    return payload;
   }
 
   String validateForm() {