BUG: Wrong dataframe id value (#422)

python/xorbits/_mars/dataframe/core.py

@@ -2296,13 +2296,9 @@ def __mars_tensor__(self, dtype=None, order="K"):
         return self._data.__mars_tensor__(dtype=dtype, order=order)
 
     def __getattr__(self, key):
-        try:
-            return getattr(self._data, key)
-        except AttributeError:
-            if key in self.dtypes:
-                return self[key]
-            else:
-                raise
+        if self.dtypes is not None and key in self.dtypes:
+            return self[key]
+        return getattr(self._data, key)
 
     def __dir__(self):
         result = list(super().__dir__())

python/xorbits/pandas/mars_adapters/tests/test_mars_adapters.py

@@ -166,6 +166,18 @@ def test_dataframe_getattr(setup, dummy_df):
         idx += 1
 
 
+def test_dataframe_getattr_id(setup, dummy_df):
+    dummy_df["id"] = (0.0, 1.0, 2.0)
+    id_values = dummy_df.id
+    assert isinstance(id_values, DataRef)
+
+    idx = 0
+    for i, val in id_values.items():
+        assert idx == i
+        assert val == float(idx)
+        idx += 1
+
+
 def test_dataframe_setattr(setup, dummy_df):
     assert isinstance(dummy_df.columns, DataRef)
     assert ["foo", "bar"] == list(dummy_df.dtypes.index)