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- Do you want to make sure a user has no more than one order assigned to them, or do you want to make sure an order is only assigned to one user? The perspective makes a difference. Why can't a user work on more than one order at a time? The business impact might be fulfilling the same order more than once.Greg Burghardt– Greg Burghardt2023-04-13 20:40:56 +00:00Commented Apr 13, 2023 at 20:40
- User cannot have more than one order assigned to him, that is the business requirementAndre Silva– Andre Silva2023-04-13 22:25:03 +00:00Commented Apr 13, 2023 at 22:25
- 1whatever you end up designing will probably be a reinvention of something that relational databases already do (such as unique indexes, as you mentioned, but probably transactions)Stack Exchange Broke The Law– Stack Exchange Broke The Law2023-04-14 08:03:38 +00:00Commented Apr 14, 2023 at 8:03
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