对于这样的问题SQLite也没有特别的解决方案。你说的方法几乎就是“标准”的做法，先把customer_id 设置为null, 然后插入该订单，（ 这样就不会引起外部键检查失败）， 当获取该订单准确的customer_id后，再把它更新。 App的逻辑应考虑到这一点，所有customer_id 为null的订单都是不完整的，相当于草稿。
Zhai Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 From: 邱朗<mailto:qiulang2...@126.com> Sent: 2017年3月31日 18:09 To: SQLite mailing list<mailto:sqlite-users@mailinglists.sqlite.org> Subject: [sqlite] If I got many to many relationship data first, how do I insert them to my table? Say my mobile app has a customer table, a product table, and an order table to record who buys what, the order table basically has 2 foreign keys, customer_id & product_id. Now I got the order information first, within in it I can't find the customer information in my local sqlite table. As it turns out this is a new customer, whose information will come later from another thread/queue. To make things even worse the customer id I got from the order information is not the same one I used locally. My local customer id is INTEGER PRIMARY KEY (I do record that "true customer id" as another column and set index on it) So how I do record this order information? I can come up with some clumsy solution, e.g. if I can't find contact info, I insert a record for it first. Later after I get the real information for this customer, I update customer & order table. But I was wondering is there any "standard" way for the situation like this? BTW, I did ask the same question at stackoverflow, but because I use sqlite (while all the data come from web storing in MySQL) I was wondering if sqlite has any specific solution for it. Thanks, Qiulang _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
