Add @tree_mutex() decorator and trick treebeard into using transactions #3076
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Short description
Force treebeard to use transactions. This should remove any race conditions caused by the library. The tests seem promising.
Proposed changes
@tree_mutex()
decorator to replace@django.db.transactions.atomic
(still uses it inside in addition to the mutex implementation)@tree_mutex()
Side effects
Resolved issues
Fixes: #1518, possibly #1716
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