$modx->getObject() question

It seems that you can get a document with getObject(’modDocument’,$criteria) or getObject(’modResource’,$criteria).

OTOH, you can get a chunk with getObject(’modChunk’,$criteria) but not with getObject(’modElement’,$criteria).

Is that by design?

I think it is by design, although Shaun and Jason will probably clarify

As far as I see it (with my still-not-quite-enough experience with xPDO), modResource represents a single table within the database (the same table as modDocument) so it’s quite easy to use them interchangeably with respects to retrieving a modDocument object.

However, modElement is representative of several database tables, i.e. chunks, snippets etc. - so the problem when using modElement then becomes which type of element is required, and when primary keys are involved that becomes messy

That sounds right to me. I see all modResources are in the site_content table. I wonder if we’ll be moving to having all the elements in a site_elements table down the road?