gistify421756.rb

var collectionsToEmpty = [ 'bidOMatics', 'bidTransactions', 'bids', 'invoices', 'users' ];
for(var i = 0; i < collectionsToEmpty.length; i++)
    db[collectionsToEmpty[i]].remove({});

if(db.paypal_tx)
    db.paypal_tx.drop();

db.auctions.update({},
    {
        $set: { currentPrice: 0.0 },
        $unset: { 'lastBid': 1, 'winningUserId': 1 }
    },
    { multi: true });