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I'm having problems with one of our custom validation rules that forces me to have 'blank' value in a custom field based on certain conditions.

When editing the field manually through the interface, I just erase the content of the text box and it saves fine. But with apex code, how can I put the 'blank' value inside the field? Assigning null to the field does not seem to make it work. I checked the developer console for the logs and null is correctly being assigned to my property, but the update still throws an exception with a message like :

FIELD_CUSTOM_VALIDATION_EXCEPTION, CustomField; must be blank: [CustomField__c]

Here is how I assign null in the apex code :

customObject.CustomField__c = null;

update customObject;

Assigning zero does not work either, as the validation rule needs the field to be 'blank'. Is there a hidden trick which allows me to do this through apex?

Here is the validation formula. If it evaluates to true, there is an error :
AND( ISPICKVAL(CustomStatusField ,'Custom Value') , !ISBLANK(CustomField__c )))
So the validation basically is: When CustomStatusField is equal to 'Custom Value'CustomField__c must be blank.

1 Answer

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by (30.1k points)
edited by
Setting the field to null in apex code should work. There might be another trigger which tried to set another value. Which is causing the problem.
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