ROR Shopify fulfillments api

[WaelHoury]

i'm using the shopifyAPI::Fulfillments in my ruby on rails app, i have created a private app with the required access scopes, but for some reason i can't fetch or post a fulfillment, i keep getting 404 error
i checked order id and line item id and they are correct

@shopify_fulfillment = ShopifyAPI::Fulfillment.new(
          order_id: @shopify_order_id,
          status: 'success',
          tracking_number: @fulfillment.tracking_number,
          service: @fulfillment.tracking_service,
          line_items: build_fulfillment_line_items,
          location_id: location_id
        )

build_fulfillment_line_items return a hash of line items with id and quantity 
the exact error is: ActiveResource::ResourceNotFound Exception: Failed. Response code = 404. Response message = Not Found.

[WaelHoury]

the exact message i get is:
ActiveResource::ResourceNotFound Exception: Failed. Response code = 404. Response message = Not Found.

[tolgapaksoy]

What version of shopify_api and shopify_app gems are you using?

The params you're passing to Fulfillment.new is outdated.

The oldest API version is 2022-10 and it does not support the params you're giving to Fulfillment.new: https://shopify.dev/docs/api/admin-rest/2022-10/resources/fulfillment#post-fulfillments

[WaelHoury]

api version i'm using is 2023-07, i tried using this format:

fulfillment.tracking_info = {
  "number" => "1Z001985YW99744790",
  "company" => "UPS"
}
fulfillment.line_items_by_fulfillment_order = [
  {
    "fulfillment_order_id" => 1046000798,
    "fulfillment_order_line_items" => [
      {
        "id" => 1058737530,
        "quantity" => 1
      }
    ]
  }

but i got also the same issue.

[tolgapaksoy]

Are you actually using fulfillment orders though? They are something completely different from orders.

[WaelHoury]

what do you mean exactly?
what i'm trying to do is:
sending orders from my platform to shopify, which is working fine, i can see the order there with all the details
and then if i fulfill the order i wanna create a fulfillment for that order in shopify as well
i'm able to create orders through api, and receive fulfillment updates through webhooks
but whenever i try to create a fulfillment through the api i can't

[tolgapaksoy]

You can't just start sending API requests like this without reading any docs on FulfillmentOrders 😅.

https://shopify.dev/docs/apps/fulfillment/migrate

You need to utilize FulfillmentOrders in order to create Fulfillments. Also ensure that you're running the latest versions of the "shopify_api" and "shopify_app" gems.

[WaelHoury]

i have the correct access scopes.
i see that based on docs FulfillmentOrders doesn't have a create endpoint, which makes me confused a bit now after you stated "You need to utilize FulfillmentOrders in order to create Fulfillments".
can i get a bit more details on this please?