Rails Error Method_Missing': Undefined Method 'This' for Gem::Specification

rails error method_missing': undefined method `this' for Gem::Specification

gem update --system 2.4.8 --no-ri --no-rdoc - fixed it
details are here
https://github.com/remomueller/documentation/issues/7

Factorybot doesn't recognize any attributes—method missing errors

FactoryBot changed its syntax. It now expects a block when assigning values – even static values – to variables. Change your code to this:

FactoryBot.define do
  factory :book do
    name { "my songbook" }
  end
end

See Defining Factories in their docs.

Undefined method `mass_assignment_sanitizer=' for ActiveRecord::Base:Class (NoMethodError)

Did you downgrade from Rails 3.2 RC1? Comment out the following two lines from your development.rb:

config.active_record.mass_assignment_sanitizer = :strict
config.active_record.auto_explain_threshold_in_seconds = 0.5

Rails undefined method none for ActiveModel

You're calling Pundit.policy_scope(nil, project) with an instance of Project (the one you created in let(:project)). ActiveRecord#none is defined on the class Project, which is why it works in the subject block. Compare:

Project.none     #=> #<ActiveRecord:Relation []>
Project.new.none #=> Your current error

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