[一对一](%E4%B8%80%E5%AF%B9%E4%B8%80.md) [一对多](%E4%B8%80%E5%AF%B9%E5%A4%9A.md) [多对多](%E5%A4%9A%E5%AF%B9%E5%A4%9A.md) [远程关联](%E8%BF%9C%E7%A8%8B%E5%85%B3%E8%81%94.md) [多态一对多](%E5%A4%9A%E6%80%81%E4%B8%80%E5%AF%B9%E5%A4%9A.md) [多态多对多](%E5%A4%9A%E6%80%81%E5%A4%9A%E5%AF%B9%E5%A4%9A.md) [关联数据库的调用](%E5%85%B3%E8%81%94%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E8%B0%83%E7%94%A8.md) [withDefault](withDefault.md) [跨模型更新时间戳](../%E8%B7%A8%E6%A8%A1%E5%9E%8B%E6%9B%B4%E6%96%B0%E6%97%B6%E9%97%B4%E6%88%B3.md) [withCount,withSum ,withAvg, withMax,withMin](../withCount,withSum,withAvg,withMax,withMin.md)