Empty value Check not validating on button click

Question

Hello,

I am trying to do a simple check on a paragraphField or any field(integer, text, decimal field).
The validation is not working for empty or null. I tried giving a!isNullOrEmpty(ri!value), Null(ri!value), ri!value=null. The validation message is not shown. 
If i give any other logic, it works.

jonesprakashs0001 · Accepted Answer

Using a!validationMessage function will help to achieve this.

a!formLayout(
  label: "New Application",
  contents: {
    a!paragraphField(
      label: "Paragraph",
      labelPosition: "ABOVE",
      value: ri!text,
      saveInto: { ri!text },
      refreshAfter: "UNFOCUS",
      height: "MEDIUM",
      validations: {}
    )
  },
  validations: a!validationMessage(
    message: "Invalid",
    showWhen: a!isNullOrEmpty(ri!text),
    validateAfter: "SUBMIT"
  ),
  buttons: a!buttonLayout(
    primaryButtons: {
      a!buttonWidget(
        label: "Submit",
        submit: true(),
        style: "PRIMARY"
      )
    }
  )
)

stefanhelzle0001 · Answer

A field based validation is only evaluated when the value is not null. Set "required" to true to catch this.

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