如何使用 apollo 服务器从变量运行 graphql 查询

Posted 2023-03-08

【中文标题】如何使用 apollo 服务器从变量运行 graphql 查询

【英文标题】：How to run graphql query with apollo server from variable

【发布时间】：2019-05-26 04:19:49

【问题描述】：

通过纯 graphql 实现，我们可以像这样从字符串运行查询：

var  graphql, buildSchema  = require('graphql');

var schema = buildSchema(`
  type Query 
    hello: String
  
`);

var root =  hello: () => 'Hello world!' ;

graphql(schema, ' hello ', root).then((response) => 
  console.log(response);
);

但在 ApolloServer 中找不到相同的方法：

const server = new ApolloServer( typeDefs, resolvers );
// something like this
server.runQuery(' hello ');

【参考方案1】：

其实你可以这样测试查询：

const  ApolloServer, gql  = require('apollo-server');
const  createTestClient  = require('apollo-server-testing');

const typeDefs = gql`
  type Query 
    hello: String
  
`;

const resolvers = 
  Query: 
    hello: () => 'Hello world!'
  
;

const server = new ApolloServer( typeDefs, resolvers );
const  query  = createTestClient(server);
const res = query( query: ' hello ' );
res.then(( data ) => console.log(data))
// ==> [Object: null prototype]  hello: 'Hello world!'