GOTCHAS

This document records a few common mistakes made by people using OOFILE. Over time, we will try to minimize them with OOF_Debug tests:

FAILURE TO CLOSE A TABLE DECLARATION

The macro CLASS_TABLE or DEFINE_CLASS is used to start the class declaration for a dbTable class. However, you should still have the
};
at the end of the declaration, just like any other class.

USING SINGLE = IN SEARCHES

This is the classic mistake - instead of searching for People with a Salary of 50000, we are actually assigning to the current record.

People[People.Salary=50000];
cout << People << endl << endl;

If you have OOF_Debug defined, the default setting of requiring an explicit save will catch this error, and give you a message like:

"ContextChange called on dirty record without saving: file name: People"

CHANGING A SCHEMA

An error 165 results if you change a schema to remove indexes, and then open an old file. (we are working on embedding OOFILE schemas in databases so you can "blind open")

Feature index

(c) Copyright A.D. Software 1994-2000 (All Rights Reserved).
Last Updated: 9th September 2001