Javascript GraphQL:field.resolve()结果在指令中未定义
我一直在关注我在谷歌上找到的关于如何生成AuthDirective的所有结果,但我无法让它工作 我将保留所有文件,以查看我是否在实现中出错,但我想不会,因为即使在字段中没有任何条件,我也进行了测试。resolve 我发现的一件特别的事情是field.resolve附带了4个参数,其中第一个参数总是未定义的,不确定是否可能是它,但只是作为一个附加提示 下面是代码: 这是我的typedefs的一部分Javascript GraphQL:field.resolve()结果在指令中未定义,javascript,node.js,graphql,apollo-server,express-graphql,Javascript,Node.js,Graphql,Apollo Server,Express Graphql,我一直在关注我在谷歌上找到的关于如何生成AuthDirective的所有结果,但我无法让它工作 我将保留所有文件,以查看我是否在实现中出错,但我想不会,因为即使在字段中没有任何条件,我也进行了测试。resolve 我发现的一件特别的事情是field.resolve附带了4个参数,其中第一个参数总是未定义的,不确定是否可能是它,但只是作为一个附加提示 下面是代码: 这是我的typedefs的一部分 directive @isAuthenticated on FIELD_DEFINITION sc
directive @isAuthenticated on FIELD_DEFINITION
scalar Date
type User {
id: ID,
name: String
email: String
password: String
createdAt: Date
}
type Token {
token: String
}
# IF I REMOVE @isAuthenticated this works!
type Query {
user(name: String): User! @isAuthenticated
users: [User!]! @isAuthenticated
}
type Mutation {
createUser(name: String, email: String, password: String): Boolean!
login(email: String!, password: String!): Token!
}
这是我的模式:
import path from 'path';
import { makeExecutableSchema } from 'graphql-tools';
import { fileLoader, mergeResolvers, mergeTypes } from 'merge-graphql-schemas';
import schemaDirectives from './Directives';
const typedefsArray = fileLoader(path.join(__dirname, './**/*.graphql'));
const resolversArray = fileLoader(path.join(__dirname, './**/*.resolvers.ts'));
const typeDefs = mergeTypes(typedefsArray);
const resolvers = mergeResolvers(resolversArray);
const schema = makeExecutableSchema({ typeDefs, resolvers, schemaDirectives });
export default schema;
这是我的授权指令
import { defaultFieldResolver } from 'graphql';
import { AuthenticationError, SchemaDirectiveVisitor } from 'apollo-server-express';
class AuthDirective extends SchemaDirectiveVisitor {
visitFieldDefinition(field: any) {
const { resolver = defaultFieldResolver } = field;
field.resolve = async function (...args: any) {
const [_, __, context] = args;
const { req } = context;
const accessToken = req.headers.authorization
? req.headers.authorization.replace('Bearer ', '')
: null;
if (accessToken) {
// here I was doing jwt.verify(accessToken) but I removed it for now to simplify
const result = await resolver.apply(this, args);
return result; // <--- THIS IS ALWAYS UNDEFINED
} else {
throw new AuthenticationError('Unauthorized field');
}
};
}
}
export default AuthDirective;
最后是我的用户解析器。如前所述,如果我从用户graphql查询中删除该指令,它将正常工作:
import jwt from 'jsonwebtoken';
import { AuthenticationError, UserInputError } from 'apollo-server-express';
import { IUser } from './IUser';
import UserModel from './user.schema';
import { Config } from '../../config';
const { APP_SECRET } = Config;
const createToken = async (user: IUser, secret: string, expiresIn: string) => {
const { id, email, name } = user;
return jwt.sign({ id, email, name }, secret, { expiresIn });
};
const userResolvers = {
Query: {
user: (_: any, { name }: { name: string }) => UserModel.findOne({ name }).exec(),
users: () => UserModel.find({}).exec()
},
Mutation: {
createUser: async (_: any, args: IUser) => {
await new UserModel(args).save();
return true;
},
login: async (_: any, { email, password }: IUser) => {
const user = await UserModel.findOne({ email }).exec();
if (!user) {
throw new UserInputError('No user found with this login credentials.');
}
const isValid = await user.validatePassword(password);
if (!isValid) {
throw new AuthenticationError('Invalid password.');
}
return { token: createToken(user, APP_SECRET, '30m') };
}
}
};
export default userResolvers;
和我的服务器:
import morgan from 'morgan';
import express from 'express';
import bodyParser from 'body-parser';
import compression from 'compression';
import depthLimit from 'graphql-depth-limit';
import { ApolloServer } from 'apollo-server-express';
import { Config, DBConfig } from './config';
import schema from './domain';
const { PORT } = Config;
const app = express();
const apolloServer = new ApolloServer({
schema,
validationRules: [depthLimit(7)],
context: ({ req, res }: any) => ({ req, res })
});
app.use(express.json());
app.use(compression());
app.use(morgan('combined'));
app.use(bodyParser.urlencoded({ extended: true }));
apolloServer.applyMiddleware({ app });
DBConfig.init();
app.listen(PORT, () => console.log(`Server running on port ${PORT}`));
字段
上没有解析器
属性,因此
const { resolver = defaultFieldResolver } = field;
将始终导致resolver
的值为defaultFieldResolver
。如果您在某个具有自定义冲突解决程序的字段上使用该指令,则不会调用该自定义冲突解决程序——只使用默认行为,这可能会返回undefined
您需要确保使用了正确的属性:
const { resolve = defaultFieldResolver } = field;
或者,您可以在分解字段时重命名结果变量:
const { resolve: resolver = defaultFieldResolver } = field;
天哪,我觉得自己太蠢了,除了那个,我什么都试过了!谢谢你的快速回复
const { resolve: resolver = defaultFieldResolver } = field;