[REQUIRED] Environment info

firebase-tools: 14.24.2

Platform: macOS Sequoia 15.6.1

[REQUIRED] Test case

GraphQL Schema (Minimal Example)

Create a simple Data Connect query with no input variables:

File: dataconnect/connector/GetItems.gql

query GetItems @auth(level: NO_ACCESS) {
  items {
    id
    name
  }
}

File: dataconnect/connector/connector.yaml

connectorId: "default"
generate:
  adminNodeSdk:
    outputDir: "./generated/admin"
    package: "@firebasegen/connector-admin"

Generated Code (BROKEN)

Run firebase dataconnect:sdk:generate and the generator produces:

function getItems(dcOrOptions, options) {
  const { dc: dcInstance, options: inputOpts} = validateAdminArgs(connectorConfig, dcOrOptions, options, undefined);
  dcInstance.useGen(true);
  return dcInstance.executeQuery('GetItems', inputVars, inputOpts);  // ❌ inputVars is undefined!
};

[REQUIRED] Steps to reproduce

1. Create a GraphQL query with no input variables:

   mkdir -p dataconnect/connector
   cat > dataconnect/connector/GetItems.gql << EOF
   query GetItems @auth(level: NO_ACCESS) {
     items {
       id
       name
     }
   }
   EOF

2. Configure connector.yaml with adminNodeSdk:

   connectorId: "default"
   generate:
     adminNodeSdk:
       outputDir: "./generated/admin"
       package: "@firebasegen/connector-admin"

3. Generate the Admin SDK:

   firebase dataconnect:sdk:generate

4. Try to use the generated function:

   import { getItems } from './generated/admin';
   import { getDataConnect } from 'firebase-admin/data-connect';
   
   const dataConnect = getDataConnect({ 
     serviceId: 'my-service',
     location: 'us-central1' 
   });
   
   // This will fail with ReferenceError
   await getItems(dataConnect);

5. Observe the error:

   ReferenceError: inputVars is not defined
   

[REQUIRED] Expected behavior

The generated code should pass undefined (or omit the parameter) for operations with no variables:

Expected (Working) Code:

function getItems(dcOrOptions, options) {
  const { dc: dcInstance, options: inputOpts} = validateAdminArgs(connectorConfig, dcOrOptions, options, undefined);
  dcInstance.useGen(true);
  return dcInstance.executeQuery('GetItems', undefined, inputOpts);  // ✅ undefined instead of inputVars
};

Alternative (also correct): Use the 2-argument overload:

function getItems(dcOrOptions, options) {
  const { dc: dcInstance, options: inputOpts} = validateAdminArgs(connectorConfig, dcOrOptions, options, undefined);
  dcInstance.useGen(true);
  return dcInstance.executeQuery('GetItems', inputOpts);  // ✅ 2-argument form
};

[REQUIRED] Actual behavior

Error Message:

ReferenceError: inputVars is not defined
    at getItems (generated/admin/index.cjs.js:34:51)
    at async main (index.js:10:18)

Debug Output:
When running with --debug, the Firebase CLI generates the SDK without errors, but the generated code itself contains the bug. The issue is in the code generator template, not the CLI execution.