TypeError: superclass mismatch for class ReturnTax

[dawidof]

Running via Spring preloader in process 31
Loading development environment (Rails 4.2.9)
irb: warn: can't alias context from irb_context.
irb(main):001:0> reload!
Reloading...
TypeError: superclass mismatch for class ReturnTax
    from /bundle/bundler/gems/spree_avatax_certified-f3cf18ee4928/app/models/spree_avatax_certified/request/return_tax.rb:3:in `<module:Request>'
    from /bundle/bundler/gems/spree_avatax_certified-f3cf18ee4928/app/models/spree_avatax_certified/request/return_tax.rb:2:in `<module:SpreeAvataxCertified>'
    from /bundle/bundler/gems/spree_avatax_certified-f3cf18ee4928/app/models/spree_avatax_certified/request/return_tax.rb:1:in `<top (required)>'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:268:in `load'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:268:in `block in load'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/dependencies.rb:268:in `load'
    from /bundle/bundler/gems/spree_avatax_certified-f3cf18ee4928/lib/spree_avatax_certified/engine.rb:39:in `block in activate'
    from /bundle/bundler/gems/spree_avatax_certified-f3cf18ee4928/lib/spree_avatax_certified/engine.rb:38:in `glob'
    from /bundle/bundler/gems/spree_avatax_certified-f3cf18ee4928/lib/spree_avatax_certified/engine.rb:38:in `activate'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:446:in `instance_exec'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:446:in `block in make_lambda'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:192:in `block in simple'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:504:in `block in call'
    from /bundle/gems/activesupport-4.2.9/lib/active_support/callbacks.rb:504:in `each'

[dawidof]

Also sometimes get the same error on frontend

[dhonig]

Can you let us know what Spree version your using?

[dawidof]

@dhonig 3.1.5

[dhonig]

Thanks we've tested this against a vanilla install of 3.1.5 as recently as last week. Can you outline steps to reproduce?

[dawidof]

We've got a huge project on spree.

1. made all from Installation section in Readme
2. Set up all credentials.
3. Set up shipping methods

Tested on 3 computers with the same environment. The same error.

In console, the error appears after reload! In browser, at first, it works normally, but after few minutes appears an error. It is hard to find out what is the reason.

I thought that the reason is in https://github.com/boomerdigital/spree_avatax_certified/blob/master/lib/spree_avatax_certified/engine.rb#L39. Changed cache_classes to true, this error gone, but started to appear random strange errors.

[dhonig]

Thank you. Very helpful. Give us some time to clear our plates and look into this.

[oskaror]

120 fixed the problem