Use Validation Groups for Buttons with Multiple Validation Rules

Interface patterns give you an opportunity to explore different interface designs. To learn how to directly use patterns within your interfaces, see How to Adapt a Pattern for Your Application.

Goal

Present two buttons to the end user that, based on the selection, will validate only after a particular button is clicked.

This design pattern is not recommended for offline interfaces because reflecting immediate changes in an interface based on user interaction requires a connection to the server.

This scenario demonstrates:

  • How to use validation groups

Expression

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= load(
  /*
   * All of these local variables could be combined into the employee CDT and passed into
   * a process model via a rule input
   */
  local!firstName,
  local!lastName,
  local!department,
  local!title,
  local!phoneNumber,
  local!startDate,
  /*  
  * local!isFutureHire is a placeholder varaiable used to set the validation group trigger.
  * When isFutureHire is set to true, a user can skip phone number and start date.
  */
  local!isFutureHire,
  a!formLayout(
    label: "Example: Add Employee with Conditional Requiredness",
    contents: {
      a!textField(
       label: "First Name",
        value: local!firstName,
        saveInto: local!firstName,
        required: true
      ),
      a!textField(
        label: "Last Name",
        value: local!lastName,
        saveInto: local!lastName,
        required: true
      ),
     a!dropdownField(
        label: "Department",
        choiceLabels: { "Corporate", "Engineering", "Finance", "Human Resources", "Professional Services", "Sales" },
        placeholderLabel: "-- Please Select a Department -- ",
        choiceValues: { "Corporate", "Engineering", "Finance", "Human Resources", "Professional Services", "Sales" },
        value: local!department,
        saveInto: local!department,
        required: true
      ),
     a!textField(
        label: "Title",
        value: local!title,
        saveInto: local!title,
        required: true
      ),
     /*
     * When a field has a validation group set, the required parameter and any validations
     * are deferred until the validation group is triggered by a button or link.
     *
     * Multiple validations are added to the phone number field by adding a local variable
     * that turns off required and validation group, but triggers a standard validation
     * upon unfocus from the field (rather than the onboard button click).
     */
     with(
       local!isNumberValid:if( len( local!phoneNumber ) <= 12, true, false ),
       a!textField(
          label: "Phone Number",
          placeholder: "555-456-7890",
          value: local!phoneNumber,
          saveInto: local!phoneNumber,
          required: local!isNumberValid,
          requiredMessage:"A phone number is needed if you're going to onboard this employee",
          validations: if(local!isNumberValid,"","Please enter a valid telephone less than 12 digits long."),
          validationGroup:if(local!isNumberValid,"Future_Hire","")
        )
      ),
     a!dateField(
        label: "Start Date",
        value: local!startDate,
        saveInto: local!startDate,
        required:true,
        requiredMessage:"A start date is needed if you're going to onboard this employee",
        validationGroup:"Future_Hire"
      )
    },
    buttons: a!buttonLayout(
      primaryButtons: {
        a!buttonWidget(
          label: "Submit as Future Hire",
          value: true,
          saveInto: local!isFutureHire,
          submit: true
        ),
        a!buttonWidget(
          label: "Onboard Employee Now",
          value: false,
          saveInto: local!isFutureHire,
          submit: true,
          validationGroup: "Future_Hire"
        )
      }
    )
  )
)

Test it out

  1. Click Submit As Future Hire without entering any information. Notice that the standard required message is displayed for four of the six fields.
  2. Enter a value for First Name, Last Name, Department, Title. Click Onboard Employee Now. Notice the two remaining fields will show a custom validation error.
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