ObjectExtender User's Guide and Reference

Browser description

The Map Browser is described below.
Picture of Map Browser.

The Map Browser presents several views:

In the Map Browser, you describe the mapping of each persistent class. A map is required for each persistent model class.

For each attribute, you specify the columns which should be read to populate that instance variable.

For each relationship, you specify the foreign key relationship which is its persistent representation.

The first step in defining the mapping for a class if to define a table map to contain the column and relationship maps. A class must have at least one table map specifying the table to which the class will be mapped. Table maps contain attribute and relationship maps which refer to columns and keys within the mapped table.

Mapping rules allow fields that have field lengths to be mapped together as well as fields of different data types.


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