Hi Antonella,

The errors you are seeing comes from this scenario:

You visit a group owned page and that page tries to fetch the name of
the group it belongs to so it can display that name as page's author by
fetching the info from the group's homepage.

But for some reason in this instance the group's homepage can't be
found, which is very strange as one shouldn't be able to delete the
group's homepage via Mahara itself.

I could replicate getting the same errors when I changed one of my
groups homepage view (via db) from type = 'grouphomepage' to type =
'portfolio'.

Can I get you to find the page you are trying to view in the database
and therefore find out it's group id number.

 SELECT title,`group` FROM view WHERE id = [ID];

where you replace the [ID] with the view id of the page.

Once you find the group id then do a query like:

SELECT id,title,type FROM view where `group` = [ID];

where you replace the [ID] with the group id number you found.

Normally it should show something similar to:

 id |     title      |   type    
----+----------------+----------------
 62 | Group page 1   | portfolio
 53 | Group page 2   | portfolio
 51 | Group homepage | grouphomepage

where one (and only one) of the group's pages is the type grouphomepage

If there are no pages with type = grouphomepage then can you either set
one of the existing pages (via db) for the group to be type =
grouphomepage

Or you can go to the group (via browser) and on the Pages tab click
'create page', give it a title and save (no need to edit content yet).
Get it's id by looking at the url in browser and then (via db) update
that page to be type grouphomepage.

 UPDATE view SET type = 'grouphomepage' WHERE id = [ID];

where you replace the [ID] with the page's id number you want to use.

Then reload the page in browser and you should see the title of the page
has changed to 'Group homepage' and you will be able to add group
homepage blocks to it now.

Add what you need and then click 'Return to group pages'.

So now when you go to view the page that was broken before it should
display fine.

If you are able to shed any light into how the grouphomepage got removed
that would be very helpful too

Cheers

Robert

** Changed in: mahara
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1632717

Title:
  Bugs after updating Mahara

Status in Mahara:
  Incomplete

Bug description:
  Hello,

  After the update to the latest version of Mahara (16.04) I have
  problems with the display pages of the groups.

  Here is an example :

  [WAR] 1b (lib/group.php:2338) Trying to get property of non-object
  Call stack (most recent first):

      log_message(string(size 36), integer, true, true, string(size 53), 
integer) at /mypath/maha/lib/errors.php:513
      error(integer, string(size 36), string(size 53), integer, array(size 2)) 
at /mypath/maha/lib/group.php:2338
      group_get_homepage_view(string(size 2)) at /mypath/maha/lib/view.php:5734
      View->display_author() at /mypath/maha/view/view.php:362

  [WAR] 1b (lib/errors.php:820) Failed to get a recordset: mysqli error: [1452: 
Cannot add or update a child row: a foreign key constraint fails 
("mybdd"."view", CONSTRAINT "view_ibfk_7" FOREIGN KEY ("type") REFERENCES 
"view_type" ("type"))] in EXECUTE("INSERT INTO "view" ("ctime", "mtime", 
"atime", "copynewuser", "anonymise") VALUES ('2016-10-12 15:32:22', '2016-10-12 
15:32:22', '2016-10-12 15:32:22', 0, 0)")
  Command was: INSERT INTO "view" ("ctime", "mtime", "atime", "copynewuser", 
"anonymise") VALUES (?, ?, ?, ?, ?) and values was 
(ctime:2016-10-1215:32:22,mtime:2016-10-1215:32:22,atime:2016-10-1215:32:22,copynewuser:0,anonymise:0)
  Call stack (most recent first):

      log_message(string(size 618), integer, true, true) at 
/mypath/maha/lib/errors.php:95
      log_warn(string(size 618)) at /mypath/maha/lib/errors.php:820
      SQLException->__construct(string(size 618)) at 
/mypath/maha/lib/dml.php:1088
      insert_record(string(size 4), object(stdClass), string(size 2), true) at 
/mypath/maha/lib/view.php:728
      View->commit() at /mypath/maha/lib/view.php:702
      View->__destruct() at /mypath/maha/view/view.php:362
      View->display_author() at /mypath/maha/view/view.php:362

  [WAR] 1b (lib/dml.php:1088) Failed to get a recordset: mysqli error: [1452: 
Cannot add or update a child row: a foreign key constraint fails 
("mybdd"."view", CONSTRAINT "view_ibfk_7" FOREIGN KEY ("type") REFERENCES 
"view_type" ("type"))] in EXECUTE("INSERT INTO "view" ("ctime", "mtime", 
"atime", "copynewuser", "anonymise") VALUES ('2016-10-12 15:32:22', '2016-10-12 
15:32:22', '2016-10-12 15:32:22', 0, 0)")
  Command was: INSERT INTO "view" ("ctime", "mtime", "atime", "copynewuser", 
"anonymise") VALUES (?, ?, ?, ?, ?) and values was 
(ctime:2016-10-1215:32:22,mtime:2016-10-1215:32:22,atime:2016-10-1215:32:22,copynewuser:0,anonymise:0)
  Call stack (most recent first):

      insert_record(string(size 4), object(stdClass), string(size 2), true) at 
/mypath/maha/lib/view.php:728
      View->commit() at /mypath/maha/lib/view.php:702
      View->__destruct() at /mypath/maha/view/view.php:362
      View->display_author() at /mypath/maha/view/view.php:362

  Untitled
  Mywebsite Mahara : Site unavailable
  A nonrecoverable error occurred. This probably means you have encountered a 
bug in the system

  Thank you for your help.

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