"RESTRICT"|"CASCADE"|"SET NULL" - specifies how foreign keys should behave when referenced object is deleted
贡献者指南
技术栈
javascriptnodejsrest api
领域
backenddatabase
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Basic knowledge of SQL foreign keysNode.js development setup
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
65
研究方向
Examine the association definition files in the repository to locate where foreign key constraints are currently handled. Look for existing options like 'onUpdate' and add a similar 'onDelete' option supporting 'RESTRICT', 'CASCADE', and 'SET NULL'. The change will likely be in the model generation or association configuration module, such as lib/models/associations.js.
