低佣金是为适应当前经济下行趋势。最近某二手房交易平台发布的佣金比率引起人们的关注，据了解其佣金仅为成交额的0.3%，这相比动辄数十万元佣金的提成，这种佣金交易模式，无疑会更加契合市场需求。目前我国各地的二
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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