简要回顾一下清单4，您在那里将数据表的数据源定义为控制器，那意味着控制器有一些数据源方法需要实现，如 清单 6 所示。
Return briefly to Listing 4, where you defined the data source for the table as the controller. This means that the controller has some data source methods to implement; Listing 6 shows those.
如果数据表被允许增长太大，那么存储费用可能会无法控制。
If tables are allowed to grow too large, storage fees could start to add up.
如果数据表被允许增长太大，那么存储费用可能会无法控制。
If tables are allowed to grow too large, storage fees could start to add up.
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