架构没有configuration为突变

我有以下架构:

import { GraphQLSchema, GraphQLObjectType, GraphQLInt, GraphQLString } from 'graphql'; let counter = 100; const schema = new GraphQLSchema({ // Browse: http://localhost:3000/graphql?query={counter,message} query: new GraphQLObjectType({ name: 'Query', fields: () => ({ counter: { type: GraphQLInt, resolve: () => counter }, message: { type: GraphQLString, resolve: () => 'Salem' } }) }), mutiation: new GraphQLObjectType({ name: 'Mutation', fields: () => ({ incrementCounter: { type: GraphQLInt, resolve: () => ++counter } }) }) }) export default schema; 

以下查询正常工作:

 {counter, message} 

但是, mutation {incrementCounter}会引发以下错误:

 { "data": null, "errors": [ { "message": "Schema is not configured for mutations", "locations": [ { "line": 1, "column": 1 } ] } ] } 

已知服务器是:

 import GraphQLHTTP from 'express-graphql'; const app = express(); app.use('/graphql',GraphQLHTTP({schema})); 

什么是缺失的事情,使突变configuration?

我得到了我的错误,这是一个错字:而不是在Schema构造函数中写入mutation ,我写了mutiation

 const schema = new GraphQLSchema({ // Browse: http://localhost:3000/graphql?query={counter,message} query: new GraphQLObjectType({ name: 'Query', fields: () => ({ counter: { type: GraphQLInt, resolve: () => counter }, message: { type: GraphQLString, resolve: () => 'Salem' } }) }), mutation: new GraphQLObjectType({ //⚠️ NOT mutiation name: 'Mutation', fields: () => ({ incrementCounter: { type: GraphQLInt, resolve: () => ++counter } }) }) })