※ Download: Cannot add or update a child row a foreign key constraint fails
Once you declare the second table, you can then declare the first table. Hope this helps anyone else with the same problem!
I changed it after the fact, but 0's were already in the value. The error above means that when you post your data the foreign field is empty or missing. One example for this scene: table1. Bug 5103 Cannot add or update a child row: a foreign key constraint fails Submitted: 19 Aug 2004 0:49 Modified: 9 May 2007 10:08 Reporter: Email Updates: Status: Duplicate Impact on me: None Category: MySQL Server Severity: S4 Feature request Version: 4.
- To insert value in ordrelinje, you first have to enter value in ordre table and use same ordreID in orderlinje table. I solve this issue by clearing, i.
Googled this with no useful results. I wear a lot of hats... I wear a lot of hats - Developer, Database Administrator, Help Desk, etc. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform. You do need to change the values - you can't have a record in a child table that doesn't have a matching record in a parent table - that's the whole point of a FOREIGN KEY. It's more than this solution. Get answers and train to solve all your tech problems - anytime, anywhere. Edge Out The Competition for your dream job with proven skills and certifications. Stand Out as the employee with proven skills. Move Your Career Forward with certification training in the latest technologies.
Did not try this but it should work Make sure the value that you are inserting into the foreign key exists in the parent table. Mine was error code 1452 to be exact. Get answers and train to solve all your tech problems - anytime, anywhere. Query OK, 0 rows affected 0. InnoDB currently does not allow then because they could lead to an infinite loop of updates. Query OK, 0 rows affected 0. UserID get values 4 add by manual. Googled this with no useful results. Check if in your database the foreign field in the child table can accept NULL. UserID value manualy before you created this foreign key. I am going to respond just for the sake of anyone else with a similar issue looking for an answer. So your error Error Code: 1452.
