On Oct 31, 2008, at 9:39 PM, Paul Hoadley wrote:
After finding "Subclass Entity" in Entity Modeler, and re-making the
child entity specifying horizontal inheritance, this question remains:
On 01/11/2008, at 11:19 AM, Paul Hoadley wrote:
2. Practical WebObjects (p. 32) states that horizontal inheritance
"puts a complete copy of each entity into a separate table". Does
EOF do this for me? That is, if I use _AMPerson.createAMPerson(),
does EOF put a row in the 'amperson' table, and a corresponding row
in the 'person' table?
I've just used _AMPerson.createAMPerson() to create a new AMPerson.
There's a new row in 'amperson', and nothing in 'person'. Have I
misunderstood "complete copy" here? That is, should there be a
corresponding new row in 'person', or not?
No, Person will remain empty as it is abstract. Each concrete entity
is written to its own table. One row (and hence one table) is written
per EO.
Are you sure you want Horizontal Inheritance? Single table is usually
the best choice.
Chuck
--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
http://www.global-village.net/products/practical_webobjects
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
