/**
* Saves staff model to the database and returns result (true/false)
*
* @param staffMember
* @return result of saving
*/
public bool addStaffMember(StaffModel staffMember)
{
string query = "INSERT INTO " + table + "(`firstName`, `lastName`, `phoneNumber`, `staffType`) VALUES( "
+ this.getStringInMySqlInsertableFormat(staffMember.getFirstName()) + ", "
+ this.getStringInMySqlInsertableFormat(staffMember.getLastName()) + ", "
+ (staffMember.getPhoneNumber() == "NULL" ? staffMember.getPhoneNumber() : this.getStringInMySqlInsertableFormat(staffMember.getPhoneNumber())) + ", "
+ this.getStringInMySqlInsertableFormat(staffMember.getStaffType()) + " )";
return(this.db.Execute(query));
}