jonkeane commented on a change in pull request #10646:
URL: https://github.com/apache/arrow/pull/10646#discussion_r670703153
##########
File path: r/tests/testthat/test-metadata.R
##########
@@ -205,3 +205,27 @@ test_that("metadata of list elements (ARROW-10386)", {
expect_identical(attr(as.data.frame(tab)$x[[1]], "foo"), "bar")
expect_identical(attr(as.data.frame(tab)$x[[2]], "baz"), "qux")
})
+
+
+test_that("metadata of list elements (ARROW-10386)", {
+ skip_if_not_available("dataset")
+ skip_if_not_available("parquet")
+ df <- tibble::tibble(
+ metadata = list(
+ structure(1, my_value_as_attr = 1),
+ structure(2, my_value_as_attr = 2),
+ structure(3, my_value_as_attr = 3),
+ structure(4, my_value_as_attr = 3)),
+ part = c(1, 3, 2, 1)
+ )
+
+ dst_dir <- make_temp_dir()
+ write_dataset(df, dst_dir, partitioning = "part")
+ ds <- open_dataset(dst_dir)
+ expect_warning(
+ df_from_ds <- dplyr::collect(ds),
Review comment:
Yup, that works without warning (like it should as you say):
```
> ds %>% select(part) %>% collect()
# A tibble: 4 x 1
part
* <int>
1 1
2 1
3 2
4 3
>
```
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