oa_query() now errors if it receives a filter with a missing value, instead of silently ignoring it. Guards against users accidentally specifying a filter that ends up not doing anything.
author_id <- NULL
author_works <- oa_fetch(
entity = "works",
author.id = author_id,
publication_year = 2022,
verbose = TRUE
)
#> Error: Filters must have a value: author.id
Fixes #200
oa_query()now errors if it receives a filter with a missing value, instead of silently ignoring it. Guards against users accidentally specifying a filter that ends up not doing anything.