Creating sales order through Data entities

Hi all,

I am receiving sales order from any third application. I am using SalesOrderEntity to insert data into AX tables, like, 1st I populate all data into salesOrderEntity buffer and then i call salesOrderEntity.insert(). 

but when i populate sales entity buffer, if any field is empty in receiving data, and I assign it as it is. then it gives error on insertion like, field XYZ cannot be null. 
For this i have to check all hundreds of field that if they are not empty then insert this field. 

So, I want to ask if there is any way to do this in some other way that i won't need to check empty on all fields.