failed with error 10068: “invalid operator: $oid”

Question

just updated to the latest version of mongoid (3.1.0) and sidekiq (2.7.2)
now i'm getting the error : failed with error 10068: "invalid operator: $oid"
from looking into the code i see a select like that: @selector={"_id"=>{"$oid"=>"[some id]"}}
what can get wrong here?

Answer 1

This is actually happening because BSON::ObjectId is not part of JSON... so when Sidekiq tries to serialize the args to the worker, it pukes. Check out this comment: https://github.com/mperham/sidekiq/issues/951#issuecomment-19497803

The fix is simply to convert IDs to strings when performing a job like:

EmailSubscribe.perform_async(user.id.to_s)

Answer 2

adding this to my gemfile fixed the issue:

gem 'multi_json', '1.5.1'

i guess something is wrong with the latest version (1.6.0)

EDIT: the gem has been updated to new version (1.6.1) that fixed this issue. more here: https://github.com/intridea/multi_json/issues/89