fixed main field

public/userarea/update_main_field.php

@@ -7,13 +7,15 @@ include('include/headscript.php');
 
 header('Content-Type: application/json');
 
-// Read JSON payload
 $data = json_decode(file_get_contents('php://input'), true);
 
 $template_id = intval($data['template_id'] ?? 0);
 $mapping_id  = intval($data['mapping_id'] ?? 0);
 $value       = intval($data['value'] ?? 0);
 
+// IMPORTANT: main_field may be ENUM('0','1'), so use string values
+$mainValue = ($value === 1) ? '1' : '0';
+
 if ($template_id <= 0 || $mapping_id <= 0) {
     echo json_encode(['success' => false, 'message' => 'Invalid IDs']);
     exit;
@@ -25,13 +27,12 @@ $pdo = $db->getConnection();
 try {
     $pdo->beginTransaction();
 
-    // If user is trying to activate a Main field, check current number of active Main fields
-    if ($value === 1) {
+    if ($mainValue === '1') {
         $stmt = $pdo->prepare("
-            SELECT COUNT(*) 
-            FROM template_mapping 
-            WHERE template_id = ? 
-              AND main_field = 1 
+            SELECT COUNT(*)
+            FROM template_mapping
+            WHERE template_id = ?
+              AND main_field = '1'
               AND id <> ?
         ");
         $stmt->execute([$template_id, $mapping_id]);
@@ -39,22 +40,23 @@ try {
 
         if ($currentMainCount >= 2) {
             $pdo->rollBack();
+
             echo json_encode([
                 'success' => false,
-                'message' => 'Maximum 2 Main fields allowed'
+                'message' => 'Maximum 2 Main fields allowed',
+                'currentMainCount' => $currentMainCount
             ]);
             exit;
         }
     }
 
-    // Update only this mapping
     $stmt = $pdo->prepare("
-        UPDATE template_mapping 
-        SET main_field = ? 
-        WHERE id = ? 
+        UPDATE template_mapping
+        SET main_field = ?
+        WHERE id = ?
           AND template_id = ?
     ");
-    $stmt->execute([$value, $mapping_id, $template_id]);
+    $stmt->execute([$mainValue, $mapping_id, $template_id]);
 
     $pdo->commit();