998211c483
- 从服务器拉取完整代码 - 按框架规范整理项目结构 - 配置 Drone CI 测试环境部署 - 包含后端(FastAPI)、前端(Vue3)、管理端 技术栈: Vue3 + TypeScript + FastAPI + MySQL
27 lines
1.0 KiB
SQL
27 lines
1.0 KiB
SQL
-- 修改知识点表，将material_id设为必填字段
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-- 执行日期：2025-09-27
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-- 说明：将knowledge_points表的material_id字段从可选改为必填
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-- 1. 首先检查是否有material_id为NULL的记录
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SELECT COUNT(*) as null_count FROM knowledge_points WHERE material_id IS NULL AND is_deleted = FALSE;
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-- 2. 如果有NULL值，需要先处理这些记录（可以删除或设置默认值）
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-- 这里先删除material_id为NULL的记录（如果有的话）
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DELETE FROM knowledge_points WHERE material_id IS NULL;
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-- 3. 修改字段为NOT NULL，并修改外键约束
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ALTER TABLE knowledge_points
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MODIFY COLUMN material_id INT NOT NULL COMMENT '关联资料ID';
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-- 4. 删除旧的外键约束
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ALTER TABLE knowledge_points
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DROP FOREIGN KEY knowledge_points_ibfk_2;
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-- 5. 添加新的外键约束（CASCADE删除）
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ALTER TABLE knowledge_points
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ADD CONSTRAINT knowledge_points_ibfk_2
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FOREIGN KEY (material_id) REFERENCES course_materials(id) ON DELETE CASCADE;
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-- 6. 验证修改结果
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DESCRIBE knowledge_points;
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