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下面的代码创建查询并与我的API进行交互,因为我在我的api日志上看到message: 'Cast to ObjectId failed for value "58d" at path "_id" for
,当我在graphqli中键入一个随机数时。GraphQL不会返回结果(返回null)
所以我知道它使用node-fetch命中API,但不知道为什么它没有返回我的名字。我正在使用:
{
language(id:"58d80f843ad415941d8f908b"){
name
}
}
我已经建立我的API与猫鼬和NodeJS。是否有人可以帮助:(
var fetch = require('node-fetch');
var { GraphQLSchema } = require('graphql');
var { GraphQLObjectType } = require('graphql');
var { GraphQLString } = require('graphql');
var BASE_URL = "http://localhost:3030";
function getLanguageByURL(relativeURL){
return fetch(`${BASE_URL}${relativeURL}`)
.then(res => res.json())
.then(json => json.language)
}
var LanguageType = new GraphQLObjectType({
name: 'Language',
description: '...',
fields:() => ({
name: {type: GraphQLString},
}),
});
var QueryType = new GraphQLObjectType({
name: 'Query',
description: '...',
fields:() => ({
language: {
type: LanguageType,
args: {
id: {type: GraphQLString},
},
resolve: (root, args) =>
getLanguageByURL(`/languages/${args.id}`)
}
}),
});
module.exports.schema = new GraphQLSchema({
query: QueryType,
});
您提供的'id'不是有效的mongodb'ObjectId',并更新解析器,我想你是通过'id'值传递给'_id',所以它抛出一个'error'。!在Q中添加解析器! –