SetIf没有起作用 #1484
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是 SetIf 直接就报错了，还是 Execute 的时候报错了？ |
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是SetIf直接报错的，原因就是因为meterReading为空，但是我用SetIf的原因就是要不为空的时候更新，如果用直接用obj?.value可能将原来值更新为0 |
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所以说 先用 toSql 看 生成的 sql... |
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这是语法问题，SetIf是一个方法，方法传递必然是传的你点的值，当为null时当然会空指针异常。 |
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在满足某种条件下，更新某个字段，SetIf报错
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