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https://issues.apache.org/jira/browse/ARROW-18204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17627138#comment-17627138
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Dewey Dunnington commented on ARROW-18204:
------------------------------------------
We should totally support this!
A workaround in case you need it:
{code:R}
library(arrow, warn.conflicts = FALSE)
#> Some features are not enabled in this build of Arrow. Run `arrow_info()` for
more information.
# remotes::install_github("paleolimbt/narrow")
library(narrow)
set_field_metadata <- function(field, ...) {
vals <- rlang::list2(...)
cschema <- narrow::as_narrow_schema(field)
current_vals <- cschema$metadata
keys <- union(names(vals), names(current_vals))
cschema$metadata <- c(vals, current_vals)[keys]
arrow::Field$import_from_c(cschema)
}
field_metadata <- function(field) {
narrow::as_narrow_schema(field)$metadata
}
(f <- field("some name", int32()))
#> Field
#> some name: int32
f_meta <- set_field_metadata(f, some_key = "some value")
field_metadata(f_meta)
#> $some_key
#> [1] "some value"
{code}
> [R] Allow setting field metadata
> --------------------------------
>
> Key: ARROW-18204
> URL: https://issues.apache.org/jira/browse/ARROW-18204
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Affects Versions: 10.0.0
> Reporter: Will Jones
> Priority: Major
>
> Currently, can't create a {{Field}} with metadata, which makes it hard to
> create tests regarding field metadata.
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