Issue using variables in function input queries

Retired Boards Appdev Functions
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1

I am developing a Shopify Function to apply discounts based on customer tags and product collection memberships.

collectionData (Namespace: discountApp): Holds only the variable selectedCollectionIds with an array of collection IDs.

          {
            "node": {
              "id": "gid://shopify/Metafield/27485936845038",
              "namespace": "discountApp",
              "key": "collectionData",
              "value": "{\"selectedCollectionIds\":[\"gid://shopify/Collection/422046531822\",\"gid://shopify/Collection/421527421166\"]}",
              "type": "json",
            }
          }

I have included this in my shopify.extension.toml file:

[extensions.input.variables]
  namespace = "discountApp"
  key = "collectionData"

and here is my run.graphql:

query Input($selectedCollectionIds: [ID!]) {
  cart {
    lines {
      merchandise {
        ... on ProductVariant {
          product {
            id
            handle
            inAnyCollection(ids: $selectedCollectionIds)
          }
        }
      }
    }
    buyerIdentity {
      customer {
        metafield(namespace: "discountApp", key: "tag") {
          value
        }
      }
    }
  }
  shop {
    metafield(namespace: "discountApp", key: "tags") {
      value
    }
  }
}

Here is what is returned to me from Shopify:

{
  "cart": {
    "lines": [
      {
        "merchandise": {
          "product": {
            "id": "gid://shopify/Product/8212928430318",
            "handle": "hat",
            "inAnyCollection": false
          }
        }
      },
      {
        "merchandise": {
          "product": {
            "id": "gid://shopify/Product/8208496492782",
            "handle": "t-shirt",
            "inAnyCollection": false
          }
        }
      }
    ],
    "buyerIdentity": {
      "customer": {
        "metafield": {
          "value": "Pro"
        }
      }
    }
  },
  "shop": {
    "metafield": {
      "value": "{\"Pro\":{\"collections\":{\"hats\":\"20%\",\"pants\":\"10%\",\"shirts\":\"35%\"}},\"VIP\":{\"collections\":{\"hats\":\"30%\",\"pants\":\"20%\",\"shirts\":\"40%\"}}}"
    }
  }
}

and here is the graphql code I used to create the metafield:

mutation {
  metafieldsSet(metafields: [
    {
      namespace: "discountApp",
      key: "collectionData",
      type: "json",
      value: "{\"selectedCollectionIds\":[\"gid://shopify/Collection/422046531822\",\"gid://shopify/Collection/421527421166\"]}",
      ownerId: "gid://shopify/Shop/61637230830"
    }
  ]) {
    metafields {
      id
    }
  }
}

But no matter what I do, I cannot get inAnyCollection to be true. Any suggestions or help?

2

This is your issue here:

ownerId: "gid://shopify/Shop/61637230830"

As mentioned in input query docs, the variable values need to be set on a metafield on the function owner, which is your case is probably the discount, based on your metafield naming.

3

Does this mean that you can read shop metafields in the input query, but you can’t use shop metafields for the input variables?

If so, this is a significant limitation. What do you do if you have several hundred discount codes that all follow the same logic, which changes on a weekly basis?