graphql-js - 使用graphql时出现意外的

Question

每次在同一行上都出现EOF错误，多次更改代码，甚至降级到graphql的早期版本，但没有任何积极结果。
我的代码是:

const graphql = require('graphql')
const _ = require('lodash')
 const {
     GraphQLObjectType,
     GraphQLString,
     GraphQLInt,
     GraphQLSchema
 } = graphql

const users = [
    {id: '1', firstName: 'Ansh', age: 20},
    {id: '2', firstName: 'Ram', age: 21},
    {id: '3', firstName: 'Sham', age: 20}
]

 const UserType = new GraphQLObjectType({
     name: 'User',
     fields: {
        id: {type: GraphQLString},
        firstName: {type: GraphQLString},
        age: {type: GraphQLInt}
     }
 })

 const RootQuery = new GraphQLObjectType({
     name: 'RootQueryType',
          fields: {
             user: {
                 type: UserType,
                 args: {id: {type: GraphQLString}},
                 resolve(parentValue, args) { 
                    return _.find(users, {id: args.id})
                 }
             }
         }
     })

 module.exports = new GraphQLSchema({
    query: RootQuery 
})

错误是:

    {
        "errors": [
        {
            "message": "Syntax Error GraphQL request (30:1) Unexpected <EOF>\n\n29: \n30: \n    ^\n",
            "locations": [
            {
                "line": 30,
                "column": 1
            }
            ]
        }
        ]
    }

Answer 1

问题是因为您传递的查询可能为空。

例如:

curl -X POST http://localhost:4000/graphql \ 
-H "Content-Type: application/json" \
-d '{"query": "{ user { id } }"}'

工作良好。

但是，如果您进行以下操作:

curl -X POST http://localhost:4000/graphql \
-H "Content-Type: application/json" \
-d '{"query": ""}'

您会得到意想不到的

另外，检查 GraphQL end of line issue。