Handle None as DataFrame.value (#1384)

holoviz · Jun 4, 2020 · 9625fe1 · 9625fe1
1 parent d3514b3
commit 9625fe1
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/panel/tests/widgets/test_tables.py b/panel/tests/widgets/test_tables.py
@@ -167,3 +167,12 @@ def test_hierarchical_index(document, comm):
     assert isinstance(agg1, MinAggregator)
     assert agg2.field_ == 'Float'
     assert isinstance(agg2, MinAggregator)
+
+
+def test_none_table(document, comm):
+    table = DataFrame(value=None)
+    assert table.indexes == []
+
+    model = table.get_root(document, comm)
+
+    assert model.source.data == {}
diff --git a/panel/widgets/tables.py b/panel/widgets/tables.py
@@ -78,7 +78,9 @@ def _validate(self, event):
     @property
     def indexes(self):
         import pandas as pd
-        if isinstance(self.value.index, pd.MultiIndex):
+        if self.value is None:
+            return []
+        elif isinstance(self.value.index, pd.MultiIndex):
             return list(self.value.index.names)
         return [self.value.index.name or 'index']