# This migration comes from spree (originally 20130802022321)
class MigrateTaxCategoriesToLineItems < ActiveRecord::Migration
  def change
  	Spree::LineItem.includes(:variant => { :product => :tax_category }).find_in_batches do |line_items|
  	  line_items.each do |line_item|
        line_item.update_column(:tax_category_id, line_item.product.tax_category.id)
      end
    end
  end
end

# This migration comes from spree (originally 20130802022321)
class MigrateTaxCategoriesToLineItems < ActiveRecord::Migration
  def change
    Spree::LineItem.includes(:variant => { :product => :tax_category }).find_in_batches do |line_items|
      line_items.each do |line_item|
        next if line_item.variant.nil?
        next if line_item.variant.product.nil?
        next if line_item.product.nil?
        next unless line_item.product.tax_category.present?
        line_item.update_column(:tax_category_id, line_item.product.tax_category.id)
      end
    end
  end
end

Fix migrate tax categories to line items migration
Fix migrate tax categories to line items migration

This is bringing https://github.com/spree/spree/commit/67186f8ca7eed72b20e696d53f3ceb4fa875524f from spree v2.2
