蒸气中的异步执行。如何控制

Question

func loadBy(_ req: Request) throws -> Future<[News]> {
    let parentId = try req.parameters.next(String.self)
    let parent = try self.findParentBy(req, parentId: parentId)
    var childNews: [News] = []

    let qq = parent.map(to: [News].self) { parentNews in
        for chilId in parentNews!.childIds {
            let ch = News.query(on: req).filter(\News.newsId == chilId).first().map(to: News?.self) { child in
                if let child = child {
                    childNews.append(child)
                }
                return child
            }
        }
        return childNews
    }

    return qq.flatMap(to: [News].self) { childNews in
        return childNews.map { news in
            Future.map(on: req) { news }
        }.flatten(on: req)
    }
}

在获得值之前返回

我想等到获得所需的值后再返回它们

Answer 1

谢谢。与

一起使用

async OpenPortal() {
const { email, password } = this;
   try {
      const res = await this.afAuth.auth.signInWithEmailAndPassword(
       email + '@smartpark.com',
       password
       );
     return this.OpenPortal.updateUserData(res.user);
     this.router.navigate(['admin-portal']);
   } catch (err) {
     console.dir(err);
     if (err.code === 'auth/user-not-found') {
     console.log('User not Found');
    }
  }
}