Where is the correct place to validate field in model?
For example, I have a database, with a table Product, but the database designer didn't force NOT NULL in some required fields (for instance, column SKU). So now I have to check whether these fields are NULL or not by code
I thought it will be added in
setData() method. But I think
setData() should only care about the "set data" job. Is there any better place for this validation job?