# $mandatoryIf() - Mandatory fields
This keyword is employed to enforce that a field must contain a value when saving a record under specific conditions. The most common use case for the $mandatoryIf keyword arises when you require a field to be mandatory depending on the value of another field.
# Install:
cob-cli customize madantoryIf
WARNING
Requires RecordM restart
# Usage:
$mandatoryIf(<field name> [=,!=,>,>=,<,<=] [value])
Rules:
- You can make a field mandatory with
$mandatoryIf(field=)or$mandatoryIf(field!=)when the related field value is empty or not empty respectively. - It can handle alphanumeric comparisons also.
The field built with this keyword will be highlighted with a red border when the condition is true and the field has no value.
WARNING
Notice that the field will only be validated when saving any changes made to the instance.
# Examples:
# 1. Making mandatory the field Year of Join Eu if it is a member
$mandatoryIf(Member Of EU = Yes)
# 2. Making mandatory the field Population size whenever a country is selected or not empty
$mandatoryIf(Country!=)
# 3. Making mandatory the field Description when the number of affected files is greater than 5.
$mandatoryIf(Number of affected Files > 5)
