BUG: setitem with Series[pyarrow] values (#62465)

Author: jbrockmendel

pandas/core/arrays/arrow/array.py

@@ -569,6 +569,7 @@ def _box_pa_array(
         -------
         pa.Array or pa.ChunkedArray
         """
+        value = extract_array(value, extract_numpy=True)
         if isinstance(value, cls):
             pa_array = value._pa_array
         elif isinstance(value, (pa.Array, pa.ChunkedArray)):

pandas/tests/indexing/test_iloc.py

@@ -8,6 +8,7 @@
 
 from pandas.compat import pa_version_under16p0
 from pandas.errors import IndexingError
+import pandas.util._test_decorators as td
 
 from pandas import (
     NA,
@@ -1535,3 +1536,15 @@ def test_iloc_arrow_extension_array(self):
         expected = df.iloc[:, df["c"]]
         result = df_arrow.iloc[:, df_arrow["c"]]
         tm.assert_frame_equal(result, expected, check_dtype=False)
+
+    @td.skip_if_no("pyarrow")
+    def test_setitem_pyarrow_int_series(self):
+        # GH#62462
+        ser = Series([1, 2, 3], dtype="int64[pyarrow]")
+        idx = Index([0, 1])
+        vals = Series([7, 8], dtype="int64[pyarrow]")
+
+        ser.iloc[idx] = vals
+
+        expected = Series([7, 8, 3], dtype="int64[pyarrow]")
+        tm.assert_series_equal(ser, expected)