From 16547dbdbe20950a59a7c2fd65f56e27ed376cfa Mon Sep 17 00:00:00 2001 From: Matthias Date: Sun, 12 Apr 2026 19:15:58 +0200 Subject: [PATCH] fix: improve json trades storing for pandas3 --- freqtrade/data/history/datahandlers/jsondatahandler.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/freqtrade/data/history/datahandlers/jsondatahandler.py b/freqtrade/data/history/datahandlers/jsondatahandler.py index 332b687b4..6e63adc87 100644 --- a/freqtrade/data/history/datahandlers/jsondatahandler.py +++ b/freqtrade/data/history/datahandlers/jsondatahandler.py @@ -104,6 +104,9 @@ class JsonDataHandler(IDataHandler): :param trading_mode: Trading mode to use (used to determine the filename) """ filename = self._pair_trades_filename(self._datadir, pair, trading_mode) + # Convert StringDtype columns to object to avoid NaN serialization issues + for col in data.select_dtypes(include="string").columns: + data[col] = data[col].astype(object).where(data[col].notna(), other=None) trades = data.values.tolist() misc.file_dump_json(filename, trades, is_zip=self._use_zip)