Required Field Validator
With this workflow post-function, you can ensure that a given field as a certain value
To add 'Required Field Validator' to a transition:
Click Edit for the workflow that has the transition you wish to add the validator on.
In the Workflow Designer, select the transition.
Click on Validator in the properties panel.
Click on
Add
validator
.Select
Required Field Validator
from the list of validators.Click on
Add
to add the validator on the transition.Fill the form shown below and press 'Add' button.
Fields
Required Field – Set here the source field which you want to force a certain value
Required Value – The value for the source field in order to validate against
Error Message – Set here the message you want to display o users when this validation fails.