Reviewed:  https://reviews.mahara.org/10581
Committed: 
https://git.mahara.org/mahara/mahara/commit/46ded34bc7ba35725ba628c0b01dd7b5405bccdf
Submitter: Robert Lyon (robe...@catalyst.net.nz)
Branch:    19.04_STABLE

commit 46ded34bc7ba35725ba628c0b01dd7b5405bccdf
Author: Cecilia Vela Gurovic <cecili...@catalyst.net.nz>
Date:   Fri Oct 11 15:05:54 2019 +1300

Bug 1829943: Release submitted portfolios when deleting an institution

behatnotneeded

Change-Id: I70e3c27b91bb3b6ec5afd749f3a441e23ce5afc0
(cherry picked from commit 7ba35ae895750ff3215e883cdbd18c473a7a2337)

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https://bugs.launchpad.net/bugs/1829943

Title:
  Error deleting institution due to foreign key constraint with view
  table

Status in Mahara:
  Fix Committed
Status in Mahara 19.04 series:
  Fix Committed
Status in Mahara 19.10 series:
  Fix Committed
Status in Mahara 20.04 series:
  Fix Committed

Bug description:
  Mahara: 19.04.0
  OS: Linux
  DB: Postgres
  Browser: FF

  We have an institution which no longer has any users. When trying to
  delete it, it fails due to the foreign key constraint with the view
  table - which now has the institution field.


  Call stack (most recent first):

      log_message("Array to string conversion", 8, true, true, 
"/var/www/mahara/htdocs/lib/adodb/adodb...", 45) at 
/var/www/mahara/htdocs/lib/errors.php:520
      error(8, "Array to string conversion", 
"/var/www/mahara/htdocs/lib/adodb/adodb...", 45, array(size 7)) at 
/var/www/mahara/htdocs/lib/adodb/adodb-exceptions.inc.php:45
      ADODB_Exception->__construct("postgres8", "adodb_throw", -1, "ERROR: 
update or delete on table "host" violates ...", "DELETE FROM "host" WHERE 
"institution" = ? ", array(size 1), object(ADODB_postgres8)) at 
/var/www/mahara/htdocs/lib/adodb/adodb-exceptions.inc.php:80
      adodb_throw("postgres8", "adodb_throw", -1, "ERROR: update or delete on 
table "host" violates ...", "DELETE FROM "host" WHERE "institution" = ? ", 
array(size 1), object(ADODB_postgres8)) at 
/var/www/mahara/htdocs/lib/adodb/adodb.inc.php:310
      ADODB_TransMonitor("postgres8", "adodb_throw", -1, "ERROR: update or 
delete on table "host" violates ...", "DELETE FROM "host" WHERE "institution" = 
? ", array(size 1), object(ADODB_postgres8)) at 
/var/www/mahara/htdocs/lib/adodb/adodb.inc.php:1281
      ADOConnection->_Execute("DELETE FROM "host" WHERE "institution" = ? ", 
array(size 1)) at /var/www/mahara/htdocs/lib/adodb/adodb.inc.php:1241
      ADOConnection->Execute("DELETE FROM "host" WHERE "institution" = ? ", 
array(size 1)) at /var/www/mahara/htdocs/lib/dml.php:981
      delete_records("host", "institution", "mytest") at 
/var/www/mahara/htdocs/admin/users/institutions.php:175
      delete_submit(object(Pieform), array(size 4)) at 
/var/www/mahara/htdocs/lib/pieforms/pieform.php:544
      Pieform->__construct(array(size 2)) at 
/var/www/clients/htdocs/lib/pieforms/pieform.php:166
      Pieform::process(array(size 2)) at 
/var/www/clients/htdocs/lib/mahara.php:5379
      pieform(array(size 2)) at 
/var/www/mahara/htdocs/admin/users/institutions.php:217

  [WAR] 55 (lib/errors.php:858) Failed to get a recordset: postgres8 error: 
[-1: ERROR:  update or delete on table "host" violates foreign key constraint 
"view_sub2_fk" on table "view"
  DETAIL:  Key (wwwroot)=(https://mytest.com.au) is still referenced from table 
"view".] in adodb_throw(DELETE FROM "host"  WHERE "institution" = ? , 
Array)Command was: DELETE FROM "host"  WHERE "institution" = ?  and values was 
(0:mytest)


  There are records in the view table that have submitted pages to this
  institution. It's setup with XML-RPC with a Moodle.

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