Version 3.1 Error on duplication

[bekkblando]

Error: NoMethodError Exception: undefined method 'macro' for nil:NilClass

We've only been experiencing this error using the 3.1 version and I have confirmed that we are using include_association only on associations so I do not believe it's issue 36.

For now we will continue to use 3.0, but any ideas on what the issue may be would be appreciated.

[codeinaire]

I'm using Rails 5.2 and Amoeba 3.1

Problem

pry(main)> tariff.amoeba_dup

NoMethodError: undefined method `macro' for nil:NilClass
from /usr/local/bundle/gems/amoeba-3.1.0/lib/amoeba/cloner.rb:110:in `follow_association'

Relevant Code

This is the amoeba block in tariff.rb:

amoeba do
    include_association [:standing_charges, :volume_charges, :capacity_charges]
    nullify [:workflow_state]
    append title: I18n.t('admin.tariffs.actions.clone') || '(cloned)'
  end

These are the relevant associations:

class Tariff < ApplicationRecord

  has_many :standing_charges, -> { order(title: :asc) }, dependent: :destroy, inverse_of: :tariff
  has_many :volume_charges, -> { order(title: :asc) }, dependent: :destroy, inverse_of: :tariff
  has_many :capacity_charges, -> { order(title: :asc) }, dependent: :destroy, inverse_of: :tariff

end

All of the above three models have a belongs_to association with Tariff

Solution (temporary?)

Change the amoeba block in tariff.rb to:

amoeba do
        include_association :standing_charges
        include_association :volume_charges
        include_association :capacity_charges
end

I'm not sure if this is a bug or not. The solution I have will be fine to fix the problem for our application.