Jade 7

Schema Evolves - Reorganisation


What has Happened?

A structural change was made that effects existing objects.

The Borrower class now has a myBooks collection, and the Book class has a myBorrower reference.

There are two versions of the schema.

  • Latest version - after adding new properties
  • Current version - before adding new properties

Visual clues that you are working in the latest schema are

  1. 'Gold' skin instead of 'Blue' skin
  2. Light green background in Schema Browser
  3. Red traffic light icon on the toolbar, indicating reorganisation is required.

The existing objects must be reorganised to accommodate the additional properties.

Instructions

  1. Click the traffic light button to reorganise the schema. The Classes Needing Reorg dialog is displayed.
  2. Click the Reorg button. A message displays on completion.
  3. Click the OK button.

For More Information ...

Read the paper "Schema Evolution and Instantiation" on the Jade web site.


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