Reject sentinel strings that should have been empty cells — check_registry_na

Guards a metadata registry against the write_csv(na = "NA") round-trip described in R/registry.R. Errors listing the offending columns and rows rather than returning quietly, because the whole failure mode is silence.

Usage

check_registry_na_strings(
  df,
  path = NULL,
  sentinels = c("NA", "NaN", "NULL", "N/A", "na"),
  cols = NULL
)

Arguments

df: a data.frame read from a registry CSV
path: optional source path, used in the error message
sentinels: character strings that must never appear as literal values (default "NA", "NaN", "NULL", "N/A", "na")
cols: character columns to check (default: all character columns)

Value

df, invisibly and unchanged, when clean

Examples

if (FALSE) { # \dontrun{
check_registry_na_strings(readr::read_csv("metadata/measurement_type.csv"))
} # }