Error: Field <field_name> must have a value

[ply]

I converted components from myDAC to uniDAC.
Now when I try to post new record, an error occurs for every field where I haven't assigned value.
Previously NULL value was automatically converted to "" (string with length=0)

How can I return previous behaviour?
Otherwise I need in all forms to assign zero-length strings to all string fields.

[Plash]

Try to set the RequiredFields option of TUniQuery to False.