diff --git a/app/Controllers/StockController.php b/app/Controllers/StockController.php
index bacba458..12aebdd1 100644
--- a/app/Controllers/StockController.php
+++ b/app/Controllers/StockController.php
@@ -42,6 +42,8 @@ class StockController extends BaseController
     protected $resinStockDetails_model;
     protected $gasStockDetails_model;
 
+    protected $db;
+
     /**
      * This is default constructor of the class
      */
@@ -132,7 +134,6 @@ class StockController extends BaseController
 
     public function addNewCoatingMachineDetails()
     {
-
         $postData = $this->request->getPost();
         $month = $this->request->getGet('month');
         $month = DateTime::createFromFormat('M-Y', $month)->format('Y-m');
@@ -140,6 +141,7 @@ class StockController extends BaseController
         $date = $postData['date'];
         $shift = $postData['shift'];
 
+        // Check if the same shift already exists on the same date
         $sameShiftOnDateExists = $this->coatingMachineDetails_model
             ->where('date', $date)
             ->where('shift', $shift)
@@ -150,24 +152,40 @@ class StockController extends BaseController
             return redirect()->back()->with('error', 'Already same shift exists on the same date ..!!');
         }
 
-        $inserted = $this->coatingMachineDetails_model->insert($postData);
+        // Start transaction
+        $this->db->transStart();
 
-        if ($inserted) {
-            //update Gas stock consumption if insert is successfull..!!
+        try {
+            // Insert into coating machine details table
+            $inserted = $this->coatingMachineDetails_model->insert($postData);
+            if (!$inserted) {
+                throw new \Exception('Failed to insert coating machine details');
+            }
+
+            // Update gas stock consumption
             $dateToBeInserted = $postData['date'];
             $consumption = $postData['totalGasConsumption'];
             $this->updateGasStockConsumption($dateToBeInserted, $consumption);
 
+            // Commit the transaction if all queries succeed
+            $this->db->transComplete();
+
+            if ($this->db->transStatus() === false) {
+                throw new \Exception('Transaction failed');
+            }
+
             // Set flashdata for success message
             return redirect()->to("/coatingMachineDetails?month=$month")->with('success', 'Coating Machine details updated successfully');
-        } else {
-            // Set flashdata for error message
-            return redirect()->back()->with('error', 'Failed to update Coating machine details');
-        }
 
+        } catch (\Exception $error) {
+            // Rollback on any exception
+            $this->db->transRollback();
+            return redirect()->back()->with('error', 'Failed to update Coating machine details: ' . $error->getMessage());
+        }
     }
 
 
+
     public function updateCoatingMachineDetails()
     {
 
@@ -896,15 +914,60 @@ class StockController extends BaseController
     private function updateGasStockConsumption($date, $consumption)
     {
 
+
         $resultExists = $this->gasStockDetails_model
             ->where('date', $date)
             ->first();
 
         if ($resultExists) {
 
-            $resultExists['consumption'] = $resultExists['consumption'] + ($consumption);
-            $resultExists['balanceStock'] = $resultExists['opening'] - $resultExists['consumption'];
-            $this->gasStockDetails_model->update($resultExists['id'], $resultExists);
+
+            if ($date instanceof DateTime) {
+                $date = $date->format('Y-m-d');
+            } elseif (!strtotime($date)) {
+                throw new \Exception("Invalid date format provided.");
+            } else {
+                $date = date('Y-m-d', strtotime($date));
+            }
+
+            $endDate = date('Y-m-t', strtotime($date));
+
+
+            //what happens if the updation is on the last day of the month?
+            $resultExists = $this->gasStockDetails_model
+                ->where('date >=', $date)
+                ->where('date <=', $endDate)
+                ->orderBy('date' , 'asc')
+                ->findAll();
+
+            $updatedOpeningStock=0;
+            $updates =[];
+
+
+            foreach($resultExists as $index => $result){
+
+                if($index == 0){
+                    $result['consumption']  = $result['consumption'] + ($consumption);
+                    $result['total'] = $result['opening'] + $result['purchaseBharath'] + $result['purchaseIndian'] ;
+                    $result['balanceStock'] = $result['total'] - $result['consumption'];
+                    $updatedOpeningStock =  $result['balanceStock'];
+                }else{
+
+                    $result['opening'] = $updatedOpeningStock ;
+                    $result['total'] = $result['opening'] + $result['purchaseBharath'] + $result['purchaseIndian'] ;
+                    $result['balanceStock'] =  $result['total'] - $result['consumption'];
+                    $updatedOpeningStock =  $result['balanceStock'];
+                }
+               
+               
+                $updates [] = $result;
+                
+
+            }
+
+            if(!empty($updates)){
+                $this->gasStockDetails_model->updateBatch($updates,'id');
+            }
 
         } else {
 
@@ -932,7 +995,7 @@ class StockController extends BaseController
 
 
             $startDate = DateTime::createFromFormat('Y-m-d', $date)->modify('first day of this month')->format('Y-m-d');
-            $endDate = DateTime::createFromFormat('Y-m-d', $date)->modify('last day of this month')->format('Y-m-d');
+            $endDate   = DateTime::createFromFormat('Y-m-d', $date)->modify('last day of this month')->format('Y-m-d');
 
             $datesInMonth = [];
             $inserts = [];