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Data Model Questions /

DataObject::get and child classes


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KINKCreative

Community Member, 56 Posts

30 September 2011 at 12:23pm

I am planning on developing a few child classes from a parent one. I noticed in SiteTree if I do a DataObject::get search for a page class, it will also return all child classes.

How does Silverstripe track ID's on child classes? Are all child class objects tracked in the parent table, too (by ID), or would I need to be careful e.g. a ChildClass starts from 1 and and a ChildClass with ID=1 may not be the same object as ParentClass ID=1?

Hope this makes sense.

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Willr

Forum Moderator, 5513 Posts

30 September 2011 at 10:53pm

Subclasses keep the exact same ID as parent classes. So if you get a ID on SubsubPage it'll be the same ID as SubPage, Page, SiteTree.