Using @inContext with queries/mutations

[sjelfull]

Feature details

Is your feature request related to a problem? Please describe.
Since the removal of presentment prices and adding the @inContext directive, it seems like multi-currency behaviour is not consistent or helpful in the Buy SDK, meaning you have to run custom queries somehow.

My current problem that I'm trying to solve: I want to add multi-currency support, and I want to see the cart and line items in the currently selected currency.

Step 1 was figuring out how to set the currency on the cart. After a few rounds and touching the deprecated presentmentCurrencyCode, I found buyerIdentity.countryCode which gives me the correct currency on the cart, meaning the total will show in the associated currency.

However, the line item totals/prices is NOT returned in the correct currency - they use the default currency.

It was kind of hard to find the place that explains why this is - why would the cart show in two different currencies? My current understanding is that I need to use the new @inContext directive to ALSO get the line items in the correct currency.

Describe the solution you'd like
Do you plan to add support for the @inContext directive in the short term, or could you help with a example that shows how to get the cart and all prices/totals in the same currency?

Describe alternatives you've considered
I have considered trying to do the queries manually, but it requires a bit of a lift to do this since we use the JS SDK everywhere.

Additional context

Sample response:

{
  "data": {
    "node": {
      "__typename": "Checkout",
      "id": "Z2lkOi8vc2hvcGlmeS9DaGVja291dC81ZmNhNzEzNTA3Y2E5OGY3NWE4NWJjNDkwNWNjZmI3ZT9rZXk9YWUzODgyYmNmY2YwMTAyOWZlYTBmZWM3YmM2MmUyOTc=",
      "ready": true,
      "requiresShipping": true,
      "note": null,
      "paymentDue": "475.00",
      "paymentDueV2": { "amount": "475.0", "currencyCode": "CAD" },
      "webUrl": "https://shopName.myshopify.com/1508114519/checkouts/5fca713507ca98f75a85bc4905ccfb7e?key=ae3882bcfcf01029fea0fec7bc62exxx",
      "orderStatusUrl": null,
      "taxExempt": false,
      "taxesIncluded": false,
      "currencyCode": "CAD",
      "totalTax": "0.00",
      "totalTaxV2": { "amount": "0.0", "currencyCode": "CAD" },
      "lineItemsSubtotalPrice": { "amount": "475.0", "currencyCode": "CAD" },
      "subtotalPrice": "380.75",
      "subtotalPriceV2": { "amount": "475.0", "currencyCode": "CAD" },
      "totalPrice": "380.75",
      "totalPriceV2": { "amount": "475.0", "currencyCode": "CAD" },
      "completedAt": null,
      "createdAt": "2022-03-26T14:43:21Z",
      "updatedAt": "2022-03-26T14:43:23Z",
      "email": null,
      "discountApplications": {
        "pageInfo": { "hasNextPage": false, "hasPreviousPage": false },
        "edges": []
      },
      "appliedGiftCards": [],
      "shippingAddress": null,
      "shippingLine": null,
      "customAttributes": [],
      "order": null,
      "lineItems": {
        "pageInfo": { "hasNextPage": false, "hasPreviousPage": false },
        "edges": [
          {
            "cursor": "eyJsYXN0X2lkIjoxMjI4NzQ5ODI1NjQ3MTAsImxhc3RfdmFsdWUiOjEyMjg3NDk4MjU2NDcxMH0=",
            "node": {
              "id": "Z2lkOi8vc2hvcGlmeS9DaGVja291dExpbmVJdGVtLzEyMjg3NDk4MjU2NDcxMD9jaGVja291dD01ZmNhNzEzNTA3Y2E5OGY3NWE4NWJjNDkwNWNjZmI3ZQ==",
              "title": "Revol",
              "variant": {
                "id": "Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0VmFyaWFudC8xMjI4NzQ5ODI1NjQ3MQ==",
                "title": "S / Grey",
                "price": "375.00",
                "priceV2": { "amount": "375.0", "currencyCode": "USD" },
                "weight": 25.0,
                "available": true,
                "sku": "CRA003AASG",
                "compareAtPrice": null,
                "compareAtPriceV2": null,
                "image": {
                  "id": "Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0SW1hZ2UvMjk0OTY4Mjk5MDMwMzQ=",
                  "src": "https://cdn.shopify.com/s/files/",
                  "altText": null,
                  "width": 800,
                  "height": 800
                },
                "selectedOptions": [
                  { "name": "Size", "value": "S" },
                  { "name": "Color", "value": "Grey" }
                ],
                "unitPrice": null,
                "unitPriceMeasurement": {
                  "measuredType": null,
                  "quantityUnit": null,
                  "quantityValue": 0.0,
                  "referenceUnit": null,
                  "referenceValue": 0
                },
                "product": {
                  "id": "Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0LzEzMzkyMTkzNzgyNjM=",
                  "handle": "product-slug"
                }
              },
              "quantity": 1,
              "customAttributes": [
                { "key": "_preorder", "value": "false" },
                { "key": "_backorder", "value": "false" }
              ],
              "discountAllocations": []
            }
          }
        ]
      }
    }
  }
}

[sjelfull]

Since the Buy SDK doesn't work with this at all I ended up rewriting all calls to use raw GraphQL queries.

[sblackstone]

@sjelfull Were you able to use @incontext directives using the same gql library js-buy-sdk uses? graphql-js-client ?

It seems like they support directives but not on the root query object.....

[sjelfull]

I ended up using apollographql/graphql-tag/loader (included in Gatsby) and graphql-request - think the latter was 1/3 the size of graphql-js-client according to Bundlephobia.

I copied all the .graphql files, added the @inContext directive, and used this code to change the country code depending on the language:

function replaceContextCountry(query) {
  query.definitions[0].directives[0].arguments[0].value.value = regionIsoCode

  return query
}

[Adu88]

i modified the structure of the buy sdk a bit and managed to make directives work. I will paste here some screenshots of what i did: modified the parse args function, the operation object, the send method, the checkout/product resource methods and the queries by adding that internationalization parameter. Then when you call buy sdk from react you call it: client.checkout.create(input, @inContext(country: 'US') and everything should work.

[sblackstone]

@Adu88 Thank you! I've actually been working on modifying graphql-js-client to try to support this correctly - if we're writing our own queries anyways, you really don't need js-buy-sdk, just the graphql-js-client-compiler and the schema.json file.

[JeffJassky]

@Adu88 Any chance you'd be open to sharing your changes with the community via pull request? There are a number of us who just got bit by presentmentPrices being discontinued this week in #959 and #853

[Adu88]

@JeffJassky Here you go i created a repo with the file i use for the buy-sdk client when i make queries to shopify. https://github.com/Adu88/buy-sdk. Feel free to clone it and see the updates/differences i wrote above.

Also from above it's missing this:

and of course when you call that method you've modified from the client you need to call it with your internationalDirective like this :
client.product.fetchMultiple(product_ids, internationalizationDirective), with the internationalizationDirective value should look like this: '@inContext(country:${selectedCountry.isoCode})' ex: '@inContext(country: RO)'

[joshuajylin]

@Adu88 Based on your code, I fixed some issues that occourred when the internationalizationDirective was not provided.
https://github.com/joshuajylin/buy-sdk