Mongoid 7.1.0 breaks Drivers::Mongoid#to_scope in datagrid/drivers/mongoid.rb

[mike-loopvoc]

The following code:

 def to_scope(scope)
    scope.where(nil)
  end

is no longer allowed by mongoid as of version 7.1.0 and causes an exception to be raised. The correct way to get the default scope is:

 def to_scope(scope)
    scope.all
  end

I have tested this in my application successfully. I would appreciate it if you could address this issue as soon as possible, as it is a breaking change for my application.

[mike-loopvoc]

Thanks very much!