When you want a field to be set to null, you set its value to as attribute3 in Figure 17 shows, which is equivalent to calling MyBO.set("attribute2", null) using the Service Data Object (SDO) API.
需要将字段设置为 null 时,您可以将其值设置为 (如图 17 中的 attribute3 所示),这等效于使用 Service Data Object (SDO) API 调用 MyBO.set("attribute2", null)。
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