validator: Defines a validation function and an error message for an...

In beerda/crudtable: A Shiny toolkit for Create-Read-Update-Delete Operations on Data

Description

Validators are typically passed to the formServerFactory function that creates a server-part handler of the edit dialog.

Usage

validator(inputIds, errorMessages, f)

Arguments

inputIds	a vector of input IDs for the validation function f to be bound on
errorMessages	a vector of error messages corresponding to the input IDs. This character vector is recycled as needed to match the length of inputIds
f	a validation function that expects a single input argument and returns TRUE if the given input is valid. Note that this function must handle correctly the NULL value as well as the NA value.

Value

A list of instances of the S3 class validator. The size of the resulting list equals to the number of input IDs in 'inputIds'.

See Also

filledValidator, formServerFactory

Examples

    validator('attr1',
              'attr1 must be odd',
              function(v) { !is.null(v) && !is.na(v) && v %% 2 != 0 })

beerda/crudtable documentation built on July 13, 2020, 2:16 p.m.