openfoodnetwork/app/controllers/spree/admin/variants_controller.rb

require 'open_food_network/scope_variants_for_search'

module Spree
  module Admin
    class VariantsController < ResourceController
      helper 'spree/products'
      belongs_to 'spree/product', find_by: :permalink
      new_action.before :new_before

      def create
        on_demand = params[:variant].delete(:on_demand)
        on_hand = params[:variant].delete(:on_hand)

        super

        return unless @object.present? && @object.valid?

        @object.on_demand = on_demand if on_demand.present?
        @object.on_hand = on_hand.to_i if on_hand.present?
      end

      def search
        scoper = OpenFoodNetwork::ScopeVariantsForSearch.new(params)
        @variants = scoper.search
        render json: @variants, each_serializer: ::Api::Admin::VariantSerializer
      end

      def destroy
        @variant = Spree::Variant.find(params[:id])
        flash[:success] = if VariantDeleter.new.delete(@variant)
                            Spree.t('notice_messages.variant_deleted')
                          else
                            Spree.t('notice_messages.variant_not_deleted')
                          end

        respond_with(@variant) do |format|
          format.html { redirect_to admin_product_variants_url(params[:product_id]) }
        end
      end

      protected

      def create_before
        option_values = params[:new_variant]
        option_values.andand.each_value { |id| @object.option_values << OptionValue.find(id) }
        @object.save
      end

      def new_before
        @object.attributes = @object.product.master.
          attributes.except('id', 'created_at', 'deleted_at', 'sku', 'is_master')
        # Shallow Clone of the default price to populate the price field.
        @object.default_price = @object.product.master.default_price.clone
      end

      def collection
        @deleted = params.key?(:deleted) && params[:deleted] == "on" ? "checked" : ""

        @collection ||= if @deleted.blank?
                          super
                        else
                          Variant.unscoped.where(product_id: parent.id).deleted
                        end
        @collection
      end
    end
  end
end