Hello community, 

I'm working with a external database. Due to business requirements a field in the form is now not mandatory and it remains as blank. When the object is sent to database and this field is blank it returns an error. Checking the database column for allowed data types I see that it allows blank but not null. So my question is: Is there a chance that the object is being sent with null value in that particular field instead of blank and how can I trace it?

And if this is the case, how can I prevent to be sending null values?

Thanks in advance.