As of Spring '21 sandbox testing22:
Formulas CAN be used in trigger conditions on before save flow triggers
Formulas CAN be used in trigger conditions in after save flow triggers
Formulas CAN be used in decisions in before save flow triggers IF the Resource uses the Prior Value (eg {!$Record__Prior.IsActive__c}). But you can NOT use formula values from the newly changed record.
Formulas CAN be used in decisions in after save flow triggers
Formulas CAN be used as the source value in Assignment Updates in before save flow triggers IF the Value uses the Prior Value (eg {!$Record__Prior.IsActive__c}). But you can NOT use formula values from the newly changed record.
Formulas CAN be used as the source value Update records elements in after save flow triggers
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| Tip |
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So, use formulas in Flow Triggers IF you can be sure they are stable formulas and be very careful to test what happens when the formula value changes! |
Formulas in Updates
Again it’s a bit fat no from Before-Save Flows.
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Formula Templates
Not Changed
| Code Block |
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{!$Record.Field__c} = {!$Record__Prior.Field__c} |
IsChanged
| Code Block |
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{!$Record.Field__c} <> {!$Record__Prior.Field__c} |
IsChanged and Was Blank
| Code Block |
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AND(NOT(ISBLANK({!$Record.Field__c})),ISBLANK({!$Record__Prior.Field__c})) |
It seems weird to use IS in Prior context, not WAS.