Question

问题是，尽管我认为我已经处理了所有情况，但我遇到了UNhandledPromiseRejection错误。代码从profileRoutes到Controller再到Utils，首先出现错误。

在profileRoutes.js内

在controllers / index.js内部

library(lattice)
data <- iris
data <- as.data.frame(data)
data <- data[-c(1,2,3,4)]
data$Class <- as.factor(c(rbinom(50,1,0.7),rbinom(100,1,0.1)))
data$species2 <- as.factor(rbinom(150,1,0.85))

data2 <- as.data.frame(table(data$Species,data$Class))
barchart(Var1~Freq,groups=Var2,data=data2,stack=TRUE,
         auto.key=list(title = "Class",columns=2))
data3 <- as.data.frame(table(data$species2,data$Class))
barchart(Var1~Freq,groups=Var2,data=data3,stack=TRUE,
         auto.key=list(title = "Class",columns=2))

在utils / index.js内部

router.get('/:username', async (r, s) => {
    try{
        let profileData = await getProfileData(r.params.username);
        s.json({ success: true, payload: profileData });
    }catch(err){
        console.log('ending request processing by responding a error');
        s.status(500).json({ success: false, message: 'err[0].message' });
    }
});

向const fetchQueue = [getUserRepos]; async function getProfileData(username) { let profileData = {}; try{ let results = await Promise.all(fetchQueue.map(item => item(username))); for (let i = 0; i < results.length; i++) { profileData[getKeys[i]] = results[i]; } return profileData; }catch(err){ console.log('error log in controller/index getProfileData function'); throw err; } } const getUserRepos = async (username) => { try { // const res = await utils.gqlSender(username, 'userRepos', { createdAt }); const res = await utils.gqlSender(username, 'userReposData'); return res.user.repositories; } catch (err) { console.log('error log in controller/index getUserRepos function'); throw err; } };发出获取请求时的堆栈跟踪为-


const gqlSender = async (username, type, opt = {}) => {
    
    axios.post('', {
        query: gqlQuery(username, type, opt) // generates a needed graphQL query
    }).then(res => {
        if(res.data.errors) {  // this is where the error is recieved and so i reject promise.                     
            console.log('bef@@@re'); 
            return Promise.reject (res.data.errors);
        }
        console.log('###',res.data);
        return res.data;
    }).catch(err => {
        console.log('error in making axios request inside utils/index gqlSender function');
        throw err;
        // return Promise.reject(err);
    });

我不认为我没有错过任何诺言。任何帮助表示赞赏。谢谢。

我以前已经提到了这些答案-

Answer 1

您的gqlSender函数未return履行将被拒绝的诺言，因此不会在任何地方进行处理。您应该写

const gqlSender = (username, type, opt = {}) => {
    return axios.post('', {
//  ^^^^^^
        query: gqlQuery(username, type, opt) // generates a needed graphQL query
    }).then(res => {
        if (res.data.errors) {
            console.log('error in making axios request inside utils/index gqlSender function');
            throw res.data.errors;
        } else {
            console.log('###',res.data);
            return res.data;
         }
    });
};

或

const gqlSender = async (username, type, opt = {}) => {
//                ^^^^^
    const res = await axios.post('', {
        query: gqlQuery(username, type, opt) // generates a needed graphQL query
    });
    if (res.data.errors) {
        console.log('error in making axios request inside utils/index gqlSender function');
        throw res.data.errors;
    } else {
        console.log('###',res.data);
        return res.data;
     }
}

Node.js承诺给予未处理的承诺拒绝，似乎可以正确处理

1 个答案: