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在两个数据库上运行查询

[英]Running queries on two databases

原文 2014-11-18 03:52:30 9 1 php/ mysql

Let say I am building a bookstore for all the books in a library. 假设我正在为图书馆中的所有书籍建立书店。 People won't be buying these books, only renting them for so long. 人们不会买这些书，只会租那么长时间。

They will have to create an account and the proceed to make a rental. 他们将必须创建一个帐户，然后进行租金。 What I want to know is, what would stop some random person from a different city let say, making an account and renting all the books at once?(like a hack or a prank) I have come up with one solution where as to make the users only allowed to rent out one book per a certain time period, but then someone will could just make 100+ accounts if they so wish. 我想知道的是，是什么会阻止某个来自其他城市的随机人说，做一个帐户并一次租借所有书籍？（例如骇客或恶作剧），我想出了一种解决方案用户只允许在特定时间段内租借一本书，但是如果有人愿意的话，某人将只能创建100多个帐户。

Could you only allow people to create an account who matches a certain criteria in another database(say user database) with there name, email and usernames? 您能否只允许人们创建一个名称，电子邮件和用户名与另一个数据库（例如用户数据库）中的特定条件匹配的帐户？ So that no one can just randomly make an account, only people who are already in a different database? 这样一来，没有人可以随机创建一个帐户，只有已经在不同数据库中的人可以注册一个帐户吗？

1 个解决方案

Well, you just can't avoid other people create many account, but you can limit some things. 好吧，您只是无法避免其他人创建许多帐户，但是您可以限制某些事情。

For example 例如

1- Check the user IP address. 1-检查用户IP地址。
2- Avoid one person can rent more than one book. 2-避免一个人可以租多本书籍。
3- When you rent a book, you can get a DNI or some document that is unique. 3-当您租借书籍时，可以获得DNI或某些唯一的文档。

Those, just are some examples, but how i told you, you can't control it. 这些只是一些示例，但是我如何告诉您，您无法控制它。