In many places in the GenomicDataCommons package, the entity ids are stored in a column or a vector with a specific name that corresponds to the field name at the GDC. The format is the entity name (singular) "_id". This generic simply returns that name from a given object.
Arguments
- x
An object representing the query or results of an entity from the GDC ("cases", "files", "annotations", "projects")
Examples
id_field(cases())
#> [1] "case_id"