check_field_class: Check the classes of fields in a GTFS object element

In gtfsio: Read and Write General Transit Feed Specification (GTFS) Files

Check the classes of fields in a GTFS object element

Description

Checks the classes of fields, represented by columns, inside a GTFS object element.

Usage

check_field_class(x, file, fields, classes)

assert_field_class(x, file, fields, classes)

Arguments

x	A GTFS object.
file	A string. The element, that represents a GTFS text file, whose fields' classes should be checked.
fields	A character vector. The fields to have their classes checked.
classes	A character vector, with the same length of fields. The classes that each field must inherit from.

Value

check_field_class returns TRUE if the check is successful, and FALSE otherwise.
assert_field_class returns x invisibly if the check is successful, and throws an error otherwise.

See Also

Other checking functions: check_field_exists(), check_file_exists()

Examples

gtfs_path <- system.file("extdata/ggl_gtfs.zip", package = "gtfsio")
gtfs <- import_gtfs(gtfs_path)

check_field_class(
  gtfs,
  "calendar",
  fields = c("monday", "tuesday"),
  classes = rep("integer", 2)
)

check_field_class(
  gtfs,
  "calendar",
  fields = c("monday", "tuesday"),
  classes = c("integer", "character")
)

gtfsio documentation built on Oct. 20, 2023, 9:08 a.m.