Improved export_csv.py

routes/export_csv.py

@@ -7,23 +7,28 @@ export_csv_bp = Blueprint('export_csv', __name__)
 
 @export_csv_bp.route('/export_csv', methods=['POST'])
 def export_csv():
+    # Create an in-memory file-like object
     output = io.StringIO()
-    outcsv = csv.writer(output, delimiter='|')
+    writer = csv.writer(output, delimiter='|')
 
-    records = Asset.query.all() # Fetch all records from the database
+    # Fetch all records from the database
+    records = Asset.query.all()
 
     # Write headers
-    outcsv.writerow([column.name for column in Asset.__mapper__.columns])
+    writer.writerow([column.name for column in Asset.__mapper__.columns])
 
     # Write data rows
     for record in records:
-        outcsv.writerow([getattr(record, column.name) for column in Asset.__mapper__.columns])
+        writer.writerow([getattr(record, column.name) for column in Asset.__mapper__.columns])
 
-    output.seek(0)  # Move cursor to the beginning
-    
-    # Send the file as a download
-    return Response(
+    # Prepare the response
+    response = Response(
         output.getvalue(),
         mimetype="text/csv",
         headers={"Content-Disposition": "attachment;filename=inventory_export.csv"}
     )
+
+    # Close the in-memory file-like object
+    output.close()
+
+    return response