地震后村庄遭到沙涌是因为地质原因，泥浆浪头达到了三米高。由于甘肃积石县发生了6.2级地震导致青海海东民和县中川乡金田村与草滩村出现了沙涌现象，当地大量的房屋被淤泥包围，有20名群众已经失联，青海省消防救援总
Is there a compact way with ActiveRecord to query for what id it\'s going to use next if an object was going to be p开发者_如何学Pythonersisted to the database? In SQL, a query like this would look so
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