ErrorControllerList: ErrorControllerList
In DavidBarke/QWUtils: Useful Methods For Programming with Shiny

Description Usage Methods

Reactive R6Class that returns HTML according to a test function. Modules like checked_text_input or observed_vector_input provide a argument accepting an ErrorController or ErrorControllerList that expands the module's default tests.

error_controller <- shiny::isolate({
  ErrorControllerList$new()$add_error_controller(
    ErrorController$new(
      fun = function(x) purrr::is_null(x),
      ui_true = "x is NULL",
      ui_false = "x is not NULL",
      error = TRUE
    )
  )})

new(): Initialize the error controller list.
add_error_controller(error_controller): Add an ErrorController to the error controller list.
get_ui(): Get the UI of all ErrorController as a list ordered by the priority of the respective ErrorController.
has_error(): Returns TRUE if any of the ErrorController has an error.
set_value(value): Sets the value of all ErrorController.