Asynchronous 流星：等待回电

当我在Meteor应用程序上创建帐户时，我会多次检查每个元素的有效性。然后我创建用户。如果没有出现错误，我将显示success div，在另一个案例中显示错误div

Accounts.createUser(options ,function(err){
      if(err){
        console.log("rorororororroro");
        if(err.message == "Email already exists. [403]"){
          Session.set('error', regAlert("This email adress already exists", tmpl));
        }else{
          Session.set('error', regAlert("Sorry, but an unidentified error occured. Please retry later. If the error persists, contact the support"));
        }
      }else if(Meteor.call('talknameIsAvailable', talkname)){
        Session.set('error', regAlert("A user with this talkname already exists", tmpl));
      }
    });
    if(!Session.get('error')){
      $('#register-success').show("slow");
      //console.log("[SUCCESS] Account created");
      //document.location.href="/";
    }else{
      $('#register-error').show("slow");
    }

问题是我总是显示success div，因为在回调设置错误会话变量之前，最后一个if/else是在电子邮件已经使用时计算的

Meteor处理这个案子的最好方法是什么

---

感谢您

当Session.geterror未定义时！Session.geterror返回true

尝试：

我添加了。请在createUser函数的末尾等待：

Accounts.createUser(options ,function(err){
  if(err){
    console.log("rorororororroro");
    if(err.message == "Email already exists. [403]"){
      Session.set('error', regAlert("This email adress already exists", tmpl));
    }else{
      Session.set('error', regAlert("Sorry, but an unidentified error occured. Please retry later. If the error persists, contact the support"));
    }
  }else if(Meteor.call('talknameIsAvailable', talkname)){
    Session.set('error', regAlert("A user with this talkname already exists", tmpl));
  }
}).wait();

---

在函数开头定义的错误会话var il为false。在计算函数时，如果出现问题，它可能会将其设置为true

Accounts.createUser(options ,function(err){
  if(err){
    console.log("rorororororroro");
    if(err.message == "Email already exists. [403]"){
      Session.set('error', regAlert("This email adress already exists", tmpl));
    }else{
      Session.set('error', regAlert("Sorry, but an unidentified error occured. Please retry later. If the error persists, contact the support"));
    }
  }else if(Meteor.call('talknameIsAvailable', talkname)){
    Session.set('error', regAlert("A user with this talkname already exists", tmpl));
  }
}).wait();