我试图使用for循环将数据推送到实时数据库中,因为有多个条目。我对应该如何处理多个承诺感到困惑。请帮忙。
onSubmit() {
for(let i = 0; i < this.userList.length; i++) {
this.mtcService.getUserCount(this.userList[i].$key).subscribe(
((ct) => {
const Mtcount = ct.length;
// pushing to realtime db =>
this.mtcService.createUser(this.userList[i].$key, Mtcount, this.userForm.value)
.then(() => {
console.log('Success ' + i);
}, err => {
console.log(err);
})
}),
((err) => {
console.log(err);
})
);
}
}
getUserCount(id) {
return this.db.list('path1/path2/' + id).snapshotChanges();
}
createUser(path, count, data) {
return this.db.object('path3/path4/' + path + '/' + count).set(data);
}
答案 0 :(得分:0)
const promises = data.map(async (id) => {
await Axios.post(URL);
});
await Promise.all(promises);