crunch uses the
jsonlite package for JSON serialization and
does not allow for defining S4 methods for other object types. So,
jsonprep, which exists to translate
objects to base R objects, which
jsonlite::toJSON can handle.
jsonprep is defined as an S4 generic, and it is exported, so you can define
methods for it if you have other
objects that you want to successfully serialize to JSON.
jsonprep(x, ...) # S4 method for AbstractCategories jsonprep(x, ...) # S4 method for ANY jsonprep(x, ...) # S4 method for ShojiOrder jsonprep(x, ...) # S4 method for OrderGroup jsonprep(x, ...) toJSON(x, ..., for_query_string = FALSE)
jsonprep returns a base R object that
toJSON returns the JSON-serialized character object.