NodeJS when adding a record to MYSQL leaves a duplicate
7 USD When you start the application, if there are already values in the table, miss them and add new ones.
Offer the price.
Client's review of cooperation with Aleksey S.
NodeJS when adding a record to MYSQL leaves a duplicateExcellent artist, did everything quickly and quality!
Freelancer's review of cooperation with Artem Kravchenko
NodeJS when adding a record to MYSQL leaves a duplicateThe customer is an adequate and pleasant person. It was pleasant to work. The only thing that was not quite clear was the task explained, but it was compensated by Arthom’s communication. Everyone is pleased and I advise for cooperation.
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Winning proposal1 day7 USD
899 21 0 1 Winning proposal1 day7 USD
Good time of day.
I am a full stack web developer, I have been working on node.js for more than 3 years.
Ready to fulfill your order.
Write, we will discuss the details, and I will begin the work.
With respect, Alexey
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1. Попробуйте поменять метод генерации случайных чисел.
2. Добавьте проверку наличия записи перед добавлением ее в базу данных и запускайте генерацию повторно если запись существует.
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метод к сожалению менять не вариант 😔
а по поводу проверки, в nodejs и mysql в прямых запросах не разбираюсь, вот в php - другое дело)
поэтому и разместил заявку
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вопрос непонятный, если хотите чтобы поля были индентити то просто сделайте их PK хоть это и херня)
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что такое рк?))
вот пример, я запускаю приложение на 2 значения, и получаю в базу данные:
id hash multiplier
1 123 1.00
2 456 8.00
потом запускаю еще раз приложение, получаю в базу данные:
id hash multiplier
3 123 1.00
4 456 8.00
т.е айди auto incriment и меняется, а данные начинаются вписываться сначала, то что сначала - это нормально, вот нужно дубли не добавлять
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SELECT id FROM mytable WHERE hash=xxx AND multiplier=yyy
Если запрос вернул записи, то надо повторно генерировать данные.
Почитай про псевдослучайные числа. должен быть метод который генерацию случайных чисел делает более случайными. Например в С++ я использую вот такие функции
srand(time(NULL));
randomize();
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сделал это еще сначала
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Это приведёт к ошибке. А ее надо будет обрабатывать.
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