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SOLVED AGAIN: More info - Error 1005 is connected to Error 1452
Posted by: Mohamed Infiyaz Zaffer Khalid
Date: May 07, 2009 10:12PM

Hi everybody, here's another 'discovery' I made today. At first the error 1005 recurred when trying to create foreign key relationships with cascading updates and deletes. And indexing the tables with foreign keys solved it (as mentioned in my previous post).

Surprisingly, when I attempted to insert a record in the master table, I got error 1452 - "cannot add or update a child row: foreign key constaint fails".

Now initially, I thought this to be a with MySQL since I was only able to create the relationship after deleting all records in the master table. But later on I discovered that THE ACTUAL REASON for the error 1452 was that the command to create the relationships was incorrect.

I failed to check the syntax I blindly ran through the RLATIONSHIP VIEW on phpMyAdmin. But then I remembered that I had selected the relationship view WHILE ON THE MASTER TABLE and THIS WAS THE PROBLEM.

Actually you're supposed to FIRST SELECT THE TABLE WITH THE FOREIGN KEY and THEN select the primary key in the master table using the interface.

I hope this helps and I'm sorry if I caused any confusion.

Happy coding
Khalid

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Edited 1 time(s). Last edit at 05/07/2009 10:52PM by Mohamed Infiyaz Zaffer Khalid.

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