Not entirely convinced by MongoDB.

Tänään kirjoitankin englanniksi.

I mean, okay, the database itself can probably do all sort of neat things, but I could as easily wrap an SQL database in a layer, and put data into an object table. lessee,

"object" table, with IDs, and JSON strings,
"object_class" table.

Now we can dump any object into the database, at the cost of doing filtering and such in the wrapper.

I guess there's a speed advantage, to dedicated noSQL db, though.