David Taylor ed91385c18
DEV: Update DB.after_commit to be compatible with 'real' transactions (#11294)
Previously it matched the behavior of standard ActiveRecord after_commit callbacks. They do not work well within `joinable: false` nested transactions. Now `DB.after_commit` callbacks will only be run when the outermost transaction has been committed.

Tests always run inside transactions, so this also introduces some logic to run callbacks once the test-wrapping transaction is reached.
2020-12-08 11:03:31 +11:00
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