fixing chart keys in MultiLineViz (#12937)
diff --git a/superset/viz.py b/superset/viz.py
index face56f..b403899 100644
--- a/superset/viz.py
+++ b/superset/viz.py
@@ -1463,10 +1463,14 @@
x_values = [value["x"] for value in series["values"]]
min_x = min(x_values + ([min_x] if min_x is not None else []))
max_x = max(x_values + ([max_x] if max_x is not None else []))
-
+ series_key = (
+ series["key"]
+ if isinstance(series["key"], (list, tuple))
+ else [series["key"]]
+ )
data.append(
{
- "key": prefix + ", ".join(series["key"]),
+ "key": prefix + ", ".join(series_key),
"type": "line",
"values": series["values"],
"yAxis": y_axis,
