package main 

import "database/sql"

// StringToNullString converts a string to sql.NullString
// Empty strings will be converted to NULL (Valid = false)
// Non-empty strings will be valid with the string value
func StringToNullString(s string) sql.NullString {
    if s == "" {
        return sql.NullString{
            String: "",
            Valid:  false,
        }
    }
    return sql.NullString{
        String: s,
        Valid:  true,
    }
}