DataObject performs two tasks. First, it builds SQL statements based on the object's variables and the buildermethods. Second, it acts as a datastore for a table row. There's a core class, which you extend for each of your tables so that you put the data logic inside the data classes. There's also an included Generator to makeyour configuration files and your base classes.
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Step 2 of the large-variety workflow performs two tasks (extracts a list of items from the production order and fetches process details for each item).
多种工作流程的第2步执行两个任务(从生产指令中提取需要生产的产品清单并获取每一个所需产品的流程细节)。
Listing 9 shows the general structure of the controller and focuses on the initialize method and the two tasks it performs.
清单9显示了控制器的总体结构，重点放在initialize方法及其执行的如下两个任务。
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