graphql - 合并模式后 "GraphQLError: field not found in type: ' query_root '"

Question

我使用 graphql-tools 拼接了两个 graphql 端点。对于一个端点模式，它工作正常，但对于另一种模式，它会抛出此错误“GraphQLError:在类型中找不到字段:‘query_root’”。即使我在内省(introspection)时可以看到所有架构。

    const createRemoteExecutableSchemas = async () => {
        let schemas = [];
        for (let api of graphqlApis) {
            const http =  http_link.HttpLink({
                uri: api.uri,
                fetch:fetch
            });
            const link1 = setContext.setContext((request, previousContext) => {
                return {
                    headers:{authorization: previousContext.graphqlContext.headers.authorization}
                }
            }).concat(http);

            const link2 = setContext.setContext((request, previousContext) => ({
                headers: {
                    'x-hasura-admin-secret': api.secret
                }
              })).concat(http);
            const remoteSchema = await gtool.introspectSchema(link2);
            const remoteExecutableSchema =  gtool.makeRemoteExecutableSchema({
                schema: remoteSchema,
                link:link1
            });
            schemas.push(remoteExecutableSchema);
        }
        return schemas;
    };

    const createNewSchema = async () => {
        const schemas = await createRemoteExecutableSchemas();
        return gtool.mergeSchemas({
            schemas:schemas
        });

    };

    const runServer = async () => {
        const schema = await createNewSchema();
        const server =  new ap_server.ApolloServer({
            schema:schema,
            context: ({ req }) => {
                return {
                    "headers": req.headers
                }
              }
        });
        server.listen().then(({url}) => {
            console.log(`Running at ${url}`);
        });
    };
    ```

Answer 1

我找到了一个解决方案。发生这种情况是因为错误的授权被转发到第二个端点。