** Changed in: mahara/16.10
Status: Fix Committed => Fix Released
** Changed in: mahara
Milestone: 16.10.0 => None
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https://bugs.launchpad.net/bugs/1613135
Title:
Fix negative block_instance sortorders before running upgrade
Status in Mahara:
Fix Committed
Status in Mahara 15.04 series:
Fix Committed
Status in Mahara 15.10 series:
Fix Committed
Status in Mahara 16.04 series:
Fix Committed
Status in Mahara 16.10 series:
Fix Released
Bug description:
See:
https://mahara.org/interaction/forum/topic.php?id=7687&offset=0&limit=10#post30945
For Bug 1528351 we added an upgrade block that corrects the
block_instance sortorder drift that had been created by Bug 1523719.
As a workaround to the uniqueness constraint on that column, this
block temporarily moves the sortorders into the negative integerspace,
and then re-orders them as positive numbers.
However, we've had multiple reports of sites that have somehow got
negative numbers already in their block_instance.sortorder column.
These sites then error out during the upgrade, because the extant
negative numbers turn into positive numbers, and then there's a
uniqueness violation if another block being re-ordered overlaps with
it.
Ghada has written up a block of code that can fix this, and we've
shared it with some affected sites via the forum. It should be easy to
add it to the basic upgrade script, though. In order to reduce
complications, we could preface it with a check to see whether there
are negative sortorders in the database, and only run this additional
step if we find any negatives.
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