Comments (3)
tomKitty888888
commented on July 19, 2024
1
在两个关系表所对应的实体类中需要进行1对多的关联配置，如果已经配置好了，那么在检查在取多数据时的方法：不是直接get类中对应的list，是get关联配置的那个方法才能获取到数据，希望对你有用。
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发送时间: 2023年11月4日(星期六) 晚上7:00
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主题: Re: [greenrobot/greenDAO] 一对多的关系表映射问题 (Issue #1099)
我也遇到这个问题，toMany 的list从数据库读出来是null，请问一下你是如何解决的？
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AncientTree
commented on July 19, 2024
我也遇到这个问题，toMany 的list从数据库读出来是null，请问一下你是如何解决的？
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AncientTree
commented on July 19, 2024
谢谢，已经解决啦，找到问题所在了。和你说的这个情况很像，我是通过属性访问modelOne.modelTwoLIst，每次都是null，这是我用法错误。正确用法是modelOne.getModelTwoList() ，GreenDao在首次Build的时候已经给ModelOne中所有标记有@ToMany的属性自动生成了getter，这个自动生成的getter首次被调用时会自动读取数据库来加载填充modelTwoLIst。谢谢你的指导，也为后来朋友提供个参考。
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