Yury Lebedev

@bobishh okey, thank you, I'm closing this issue then

@ehannes the parameters look fine. I will take a look at the issue, if I will find time on this weekend

+1 would like to have a possibility to run explain on aggregate

@katiekeel are you using `console1984` gem by any chance? I think this error might actually happen because it freezes Rails classes that `datadog` gem attempts to patch: https://github.com/basecamp/console1984/blob/02b1b9ee7fd7050174b6a98c2b43057553621dc4/lib/console1984/freezeable.rb#L42

@alexanderholder your example can be fixed if you change the assertion to `assert_equal 0, project.reload.project_items_count`. The problem in your example is not that callbacks are not being called (they are),...