java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`socket`.`water_dispenser_record`, CONSTRAINT `water_dispenser_id` FOREIGN KEY (`water_dispenser_id`) REFERENCES `water_dispenser` (`id`) ON UPDATE CASCADE)\r\n### The error may exist in com/xnxy/mapper/WaterDispenserRecordMapper.java (best guess)\r\n### The error may involve com.xnxy.mapper.WaterDispenserRecordMapper.insert-Inline\r\n### The error occurred while setting parameters\r\n### SQL: INSERT INTO water_dispenser_record ( water_dispenser_id, card_number, drink_time, water_intake ) VALUES ( ?, ?, ?, ? )\r\n### Cause: java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`socket`.`water_dispenser_record`, CONSTRAINT `water_dispenser_id` FOREIGN KEY (`water_dispenser_id`) REFERENCES `water_dispenser` (`id`) ON UPDATE CASCADE)\n; Cannot add or update a child row: a foreign key constraint fails (`socket`.`water_dispenser_record`, CONSTRAINT `water_dispenser_id` FOREIGN KEY (`water_dispenser_id`) REFERENCES `water_dispenser` (`id`) ON UPDATE CASCADE); nested exception is java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`socket`.`water_dispenser_record`, CONSTRAINT `water_dispenser_id` FOREIGN KEY (`water_dispenser_id`) REFERENCES `water_dispenser` (`id`) ON UPDATE CASCADE)"}
时间: 2024-01-26 08:02:27 浏览: 210
Caused by: java.sql.SQLIntegrityConstraintViolationException: Cannot delete or update a parent row:
这个错误通常表示在插入数据时,违反了外键约束。具体来说,它指示在 `water_dispenser_record` 表中插入数据时,所引用的 `water_dispenser_id` 值在 `water_dispenser` 表中找不到对应的主键值。
这种错误通常有以下几种可能的原因和解决方法:
1. 检查数据完整性:确保在插入记录之前,`water_dispenser` 表中存在对应的 `id` 值。如果不存在,需要先插入正确的记录。
2. 检查外键约束:确认数据库中的外键约束设置正确,并且确保在插入记录时,`water_dispenser_id` 的值是有效的。
3. 检查级联更新设置:根据错误信息中提供的约束信息,检查 `water_dispenser_record` 表中的 `water_dispenser_id` 列是否设置了级联更新。如果设置了级联更新,而 `water_dispenser` 表中对应的主键值被更新或删除了,就会触发该错误。需要确保级联更新设置正确。
以上是一些常见的解决方法,希望对你有所帮助。如果问题仍然存在,请提供更多的代码和错误上下文,以便更好地帮助你解决问题。
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