解决选课函数中存在的竞争问题 #871
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解决选课函数中存在的竞争问题 #871
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加了相应的unique constraint，并且使用原子的update_or_create，避免在数据库中产生两个相同的记录
pkuGenuine
approved these changes
Jan 20, 2025
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加了相应的unique constraint，并且使用原子的update_or_create，避免在数据库中产生两个相同的记录