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module TaxonomyCollisionFinder
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extend ActiveSupport::Concern
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module ClassMethods
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def find_without_collision(attribute, value)
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from_local = find_or_initialize_by attribute => value
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from_global = unscoped.find_or_initialize_by attribute => value
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from_local.errors.add(attribute, _("cannot be used, please choose another")) if from_local.new_record? && from_global.persisted?
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from_local
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end
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end
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end
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