Hello!

To get a more detailed error message, please set

 $wgShowSQLErrors = true;
 $wgDebugDumpSql  = true;
 $wgShowExceptionDetails = true;
 $wgShowDBErrorBacktrace = true;

in your `LocalSettings.php` file.
Did you run `maintenance/update.php` on you new wiki? Maybe it's just a schema 
change that needs to be applied.

Maybe these links are helpful:

- https://www.mediawiki.org/wiki/Manual:Backing_up_a_wiki
- https://www.mediawiki.org/wiki/Manual:Restoring_a_wiki_from_backup
- https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script

Good luck,
Robert

Am Montag, den 13.07.2020, 19:43 +0200 schrieb Pascal GREGIS:

Hello,


I have tried to restore one of my wiki sites for testing, because I've always 
learnt that a non-tested backup is a useless backup.


I have exported my database named pascal_wikidb using phpmyadmin on my host 
site and obtained an sql file.

Then I have tried to import this sql file on another database (on the same host 
site) named pascal_dbtest. I have had hard time doing it because the import 
function of phpmyadmin doesn't work well with lynx, but that is another story. 
Using Firefox, I managed to do it still with an error message (I don't remember 
this message and I cannot reproduce easily this operation); so I wasn't sure my 
restoration was complete.

I then imported pascal_dbtest and it sounded complete when looking at the sql 
file, except that there are only 5 "ALTER TABLE" in it, instaed of a few dozens 
in the file exported from pascal_wikidb. Anyway it's hard to compare at a 
manual glance.


So I changed the LocalSettings.php of my wiki site to have it pointing on 
pascal_dbtest instead of pascal_wikidb :


$wgDBname = "pascal_dbtest";

$wgDBuser = "pascal_testwiki";

$wgDBpassword = "Undiscloed_password"


I opened my wiki with the normal URL, I managed to log in, but I couldn't 
modify any page, when I try I get :

"Alert: HTTP/1.1 500 Internal Server Error"

then  (this is a translation back to english, sorry)

«

A database request error occured. It could have been caused by something wrong 
in the software.

[1cd8b80a4379c26549677281] 2020-07-13 17:30:10: Fatal erreur of type 
"DBQueryError"

»


Is there any procedure to follow to restore a wiki installation from a database 
backup?

Or is it likely to be caused by a corruption in my database backup?


I precise that I almost eliminated the hypothesis of an error in the user's 
permissions on this database.


Thanks in advance for any answer


Regards


Pascal GRÉGIS



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