Fixes resulting from change in User

controllers/department_controller.py

@@ -37,6 +37,9 @@ def create_department():
         return jsonify({'message': 'User with this email already exists'}), 400
     
     try:
+        # Log the request data for debugging
+        logger.info(f"Creating new department with data: {data}")
+        
         # Create department
         department = Department(
             name=data['name'],
@@ -68,7 +71,9 @@ def create_department():
         }), 201
         
     except Exception as e:
+        import traceback
         logger.error(f"Error creating department: {str(e)}")
+        logger.error(f"Traceback: {traceback.format_exc()}")
         return jsonify({'message': f'Error creating department: {str(e)}'}), 500
 
 def get_department(department_id):

models/department.py

@@ -51,6 +51,11 @@ class Department:
         if self._id:
             # Update existing department
             department_dict["updated_at"] = datetime.now()
+            
+            # Remove _id field when updating an existing document to avoid MongoDB error
+            if "_id" in department_dict:
+                del department_dict["_id"]
+            
             result = departments_collection.update_one(
                 {"_id": ObjectId(self._id)},
                 {"$set": department_dict}