Getting "Internal Error" with GraphQL files API using "reverse" parameter (only for some shops)

[DanAtBonify]

This query fails for one of our app users:

{
    files(sortKey: CREATED_AT, reverse: true, first: 12, query: "media_type:video OR media_type:image AND -status:FAILED") {
        edges {
            node {
                __typename
                fileStatus
                preview {
                    status
                    image {
                        width
                        height
                        src
                        url(transform: {maxWidth: 300, maxHeight: 300, preferredContentType: PNG})
                    }
                }
                ... on GenericFile {
                    id
                    url
                }
                ... on MediaImage {
                    id
                    image {
                        src
                    }
                }
                ... on Video {
                    id
                    filename
                    sources {
                        fileSize
                        format
                        height
                        width
                        mimeType
                        url
                    }
                }
            }
            cursor
        }
        pageInfo {
            hasNextPage
        }
    }
}

Internal error. Looks like something went wrong on our end.
Request ID: be66bd1a-06aa-4af9-acb2-472ffb749cd5 (include this in support requests).

However, if I change the reverse: true parameter to reverse: false it works.

Curiously the reverse: true works if I change the sortKey to FILENAME or ORIGINAL_UPLOAD_SIZE. sortKey of ID still has an error though.

[ShopifyDevSup · Accepted solution]

Hi @DanAtBonify 👋

Thanks for sharing the request ID! Would you mind checking whether your app has the `read_files` scope using the below query? 

{
    currentAppInstallation {
        accessScopes {
            handle
        }
    }
}

I've seen similar behaviours with the `reverse` param on interface types since there may be an additional scope required for the returned object. In this case, I suspect it's the `GenericFile` type causing the issue. You should be able to check it with the below, if it throws a similar 500 error:

query {
    files (first:3, query: "media_type:generic_file"){
        nodes {
            __typename
        }
    }
}

@Umiko

[DanAtBonify]

Thank you!

Yes, indeed the read_files scope was missing. It was confusing because apparently some file types don't need that permission, so they load correctly. 

Also made confusing by the error message. I would expect a more specific error message referring to the specific missing scope.

[ShopifyDevSup]

Absolutely, the error message should be clearer. I'll submit an issue to adjust the error to reference the missing scope instead. Thanks for flagging this!