ActiveRecord failing at batch-insert

gistfile1.txt

irb(main):083:0> order.save.explain
   (0.4ms)  BEGIN
  SQL (15.1ms)  INSERT INTO "orders" ("address_id", "created_at", "customer_id", "order_request_id", "price_cents", "shipping_price_cents", "source", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9) RETURNING "id"  [["address_id", 291085], ["created_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00], ["customer_id", 63601], ["order_request_id", "2687c3b4-c0b3-44a1-887d-04073ae62d1b"], ["price_cents", 8900], ["shipping_price_cents", 1200], ["source", "web-cart"], ["updated_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00]]
  SQL (4.1ms)  UPDATE "customers" SET "orders_count" = COALESCE("orders_count", 0) + 1 WHERE "customers"."id" = 63601
  SQL (7.9ms)  INSERT INTO "order_items" ("created_at", "order_id", "photo_count", "printer", "product", "source", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id"  [["created_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00], ["order_id", 80566], ["photo_count", 3], ["printer", 1], ["product", "calendardateless"], ["source", "printstagram"], ["updated_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00]]
  SQL (1.6ms)  UPDATE "orders" SET "order_items_count" = COALESCE("order_items_count", 0) + 1 WHERE "orders"."id" = 80566
  SQL (5.6ms)  INSERT INTO "photos" ("created_at", "order_item_id", "position", "quantity", "received_url", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"  [["created_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00], ["order_item_id", 92044], ["position", 0], ["quantity", 1], ["received_url", "http://scontent-b.cdninstagram.com/hphotos-xaf1/t51.2885-15/10624320_1460446790896163_576385551_n.jpg"], ["updated_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00]]
  SQL (0.8ms)  INSERT INTO "photos" ("created_at", "order_item_id", "position", "quantity", "received_url", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"  [["created_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00], ["order_item_id", 92044], ["position", 1], ["quantity", 1], ["received_url", "http://scontent-b.cdninstagram.com/hphotos-xaf1/t51.2885-15/10624320_1460446790896163_576385551_n.jpg"], ["updated_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00]]
  SQL (0.7ms)  INSERT INTO "photos" ("created_at", "order_item_id", "position", "quantity", "received_url", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"  [["created_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00], ["order_item_id", 92044], ["position", 2], ["quantity", 1], ["received_url", "http://scontent-b.cdninstagram.com/hphotos-xaf1/t51.2885-15/10624320_1460446790896163_576385551_n.jpg"], ["updated_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00]]
  SQL (0.8ms)  UPDATE "customers" SET "updated_at" = '2014-09-10 19:07:34.875888', "ordered_at" = '2014-09-10 19:07:34.875888' WHERE "customers"."id" = 63601
   (2.0ms)  COMMIT
  OrderRequest Load (2.5ms)  SELECT "order_requests".* FROM "order_requests" WHERE "order_requests"."id" = $1 LIMIT 1  [["id", "2687c3b4-c0b3-44a1-887d-04073ae62d1b"]]
   (0.2ms)  BEGIN
  SQL (2.0ms)  UPDATE "order_requests" SET "order_id" = $1, "updated_at" = $2 WHERE "order_requests"."id" = '2687c3b4-c0b3-44a1-887d-04073ae62d1b'  [["order_id", 80566], ["updated_at", Wed, 10 Sep 2014 19:07:34 UTC +00:00]]
   (0.5ms)  COMMIT