rescue_belongs_to_nested_attributes.rb

class InventoryItem < ApplicationRecord
  belongs_to :location
  accepts_nested_attributes_for :location
end

def location_attributes=(attrs)
  begin
    self.location_id = Location.find_by!(name: attrs[:name])
  rescue ActiveRecord::RecordNotFound
    super
  end
end
# source: https://stackoverflow.com/questions/68418957/rails-nested-attributes-with-existing-records