Tabulator: don't attempt to set text_align on Bokeh formatters that…

… don't support it (#6010)

panel/tests/widgets/test_tables.py

@@ -2148,3 +2148,15 @@ def test_bokeh_formatter_index_with_no_textalign():
     table = Tabulator(df, formatters={"A": index_format})
     serve_and_request(table)
     wait_until(lambda: bool(table._models))
+
+@pytest.mark.parametrize('text_align', [{"A": "center"}, "center"], ids=["dict", "str"])
+def test_bokeh_formatter_column_with_no_textalign_but_text_align_set(document, comm, text_align):
+    df = pd.DataFrame({"A": [1, 2, 3]})
+    table = Tabulator(
+        df,
+        formatters=dict(A=HTMLTemplateFormatter(template='<b><%= value %>"></b>')),
+        text_align=text_align,
+    )
+
+    model = table.get_root(document, comm)
+    assert model.configuration['columns'][1]['hozAlign'] == 'center'

panel/widgets/tables.py

@@ -224,7 +224,9 @@ def _get_column_definitions(self, col_names: List[str], df: pd.DataFrame) -> Lis
                 else:
                     default_text_align = True
 
-            if isinstance(self.text_align, str):
+            if not hasattr(formatter, 'text_align'):
+                pass
+            elif isinstance(self.text_align, str):
                 formatter.text_align = self.text_align
                 if not default_text_align:
                     msg = f"The 'text_align' in Tabulator.formatters[{col!r}] is overridden by Tabulator.text_align"
@@ -234,7 +236,7 @@ def _get_column_definitions(self, col_names: List[str], df: pd.DataFrame) -> Lis
                 if not default_text_align:
                     msg = f"The 'text_align' in Tabulator.formatters[{col!r}] is overridden by Tabulator.text_align[{col!r}]"
                     warn(msg, RuntimeWarning)
-            elif col in self.indexes and hasattr(formatter, "text_align"):
+            elif col in self.indexes:
                 formatter.text_align = 'left'
 
             if isinstance(self.widths, int):