Fix causing operation name to sometimes be incorrectly done

Author: Jackson Kearl

packages/apollo-gateway/src/__tests__/gateway/queryPlanCache.test.ts

@@ -59,3 +59,52 @@ it('caches the query plan for a request', async () => {
   expect(result.data).toEqual(secondResult.data);
   expect(planner.buildQueryPlan).toHaveBeenCalledTimes(1);
 });
+
+it('supports multiple operations and operationName', async () => {
+  const query = `#graphql
+    query GetUser {
+      me {
+        username
+      }
+    }
+    query GetReviews {
+      topReviews {
+        body
+      }
+    }
+  `;
+
+  const gateway = new ApolloGateway({
+    localServiceList: [accounts, books, inventory, product, reviews],
+    buildService: service => {
+      return new LocalGraphQLDataSource(buildFederatedSchema([service]));
+    },
+  });
+
+  const { schema, executor } = await gateway.load();
+
+  const server = new ApolloServer({ schema, executor });
+
+  const { data: userData } = await server.executeOperation({
+    query,
+    operationName: 'GetUser',
+  });
+
+  const { data: reviewsData } = await server.executeOperation({
+    query,
+    operationName: 'GetReviews',
+  });
+
+  expect(userData).toEqual({
+    me: { username: '@ada' },
+  });
+  expect(reviewsData).toEqual({
+    topReviews: [
+      { body: 'Love it!' },
+      { body: 'Too expensive.' },
+      { body: 'Could be better.' },
+      { body: 'Prefer something else.' },
+      { body: 'Wish I had read this before.' },
+    ],
+  });
+});

packages/apollo-gateway/src/index.ts

@@ -260,14 +260,15 @@ export class ApolloGateway implements GraphQLService {
     >,
   ): Promise<GraphQLExecutionResult> => {
     const { request, document, queryHash } = requestContext;
+    const queryPlanStoreKey = queryHash + request.operationName || '';
     const operationContext = buildOperationContext(
       this.schema!,
       document,
       request.operationName,
     );
     let queryPlan;
     if (this.queryPlanStore) {
-      queryPlan = await this.queryPlanStore.get(queryHash);
+      queryPlan = await this.queryPlanStore.get(queryPlanStoreKey);
     }
 
     if (!queryPlan) {
@@ -285,9 +286,9 @@ export class ApolloGateway implements GraphQLService {
         // While it shouldn't normally be necessary to wrap this `Promise` in a
         // `Promise.resolve` invocation, it seems that the underlying cache store
         // is returning a non-native `Promise` (e.g. Bluebird, etc.).
-        Promise.resolve(this.queryPlanStore.set(queryHash, queryPlan)).catch(
-          err => this.logger.warn('Could not store queryPlan', err),
-        );
+        Promise.resolve(
+          this.queryPlanStore.set(queryPlanStoreKey, queryPlan),
+        ).catch(err => this.logger.warn('Could not store queryPlan', err));
       }
     }