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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Field apiextensions.fn.proto.v1.RunFunctionRequest.credentials does not have presence when \"resource.get_credentials()\" called.","articleBody":"### What happened?\n\nI have a composition which is configured to inject kubernetes secret by using \"credentials\" config. Upon loading this secret inside my composite function, fetching the credential data by using \"resource.get_credentials()\", I 'm receiving below error:\n\n\u003e crossplane: error: cannot render composite resource: cannot run pipeline step \"postInstallActivities\": rpc error: code = Unknown desc = Unexpected \u003cclass 'ValueError'\u003e: Field apiextensions.fn.proto.v1.RunFunctionRequest.credentials does not have presence.\n\nWhile the RunFunctionRequest has the credential field in it, but looks like there is change in the schema.\nBelow is the RunFunctionRequest struct:\n`observed {\n    composite {\n      resource {\n        fields {\n          key: \"spec\"\n          value {\n            struct_value {      \n            }\n            }\n          }\n        }\n      }\n    }\n  }\n  desired {\n  }\n  context {\n  }\n  credentials {\n    key: \"app1\"\n    value {\n      credential_data {\n        data {\n          key: \"init_key\"\n          value: \"redacted\"\n        }\n      }\n    }\n  }\n  credentials {\n    key: \"app2\"\n    value {\n      credential_data {\n        data {\n          key: \"init_key\"\n          value: \"redacted\"\n        }\n      }\n    }\n  }`\n\n\nExpected Behavior: \"resource.get_credentials()\" should properly fetch the Credentials from the RunFunctionRequest and return credential type and data.\n\n\n### How can we reproduce it?\n\n1. Configure a composition to run a composite function and enable config = credentials to reference the secret.\n`apiVersion: apiextensions.crossplane.io/v1\nkind: Composition\nmetadata:\n  name: postInstall\nspec:\n  compositeTypeRef:\n    apiVersion: product.example.org/v1\n    kind: postInstall\n  mode: Pipeline\n  pipeline:\n    - step: postInstallStep\n      functionRef:\n        name: function-post-install\n      credentials:\n        - name: app1\n          source: Secret\n          secretRef:\n            namespace: app1\n            name: app1-secret\n        - name: app2\n          source: Secret\n          secretRef:\n            namespace: app2\n            name: app2-secret`\n\n2. Develop a composite function to instantiate Credentials with - 'resource.get_credentials(req, \"app1\")' \n3. In an ideal case, the Credentials should be instantiated with type and data.\n\n\n### What environment did it happen in?\nFunction version: v0.6.0\n* Crossplane version: v1.18.1\n* Cloud provider or hardware configuration: Azure, Minikube\n* Kubernetes version: v1.29\n* Kubernetes distribution : AKS, Minikube\n* OS: Mac\n* Kernel: Darwin, arm64\n\n","author":{"url":"https://github.com/my-dev-ops-pro","@type":"Person","name":"my-dev-ops-pro"},"datePublished":"2025-03-26T17:29:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/137/function-sdk-python/issues/137"}