Rarible clone 教程如何捕获并向用户显示重复的电子邮件和用户名？

如何解决Rarible clone 教程如何捕获并向用户显示重复的电子邮件和用户名？

我想提醒用户注意重复错误。我怎么能用道德来做到这一点？它在浏览器的控制台上向我显示此错误

Uncaught (in promise) Error: Account already exists for this username.
    at handleError (moralis.js:22042)

还有这个>

moralis.js:21909 POST https://imgvpmtqkpng.moralis.io:2053/server/classes/_User/7vcpyk1eiAZWbpUae4b5f2rN 400 (Bad Request)


saveUserInfo = async() => {
    user.set('email',userEmail.value); //same changes have applied to the validate email function from user to functin 
    user.set('username',textUsrName.value);
    if (userAvatarFile.files.length > 0) {
        const avatar = new Moralis.File("avatarprfl.jpg",userAvatarFile.files[0]);
        user.set('avatar',avatar);
      }try {
          user.save();
      } catch (error) {
         window.alert("Ижилхэн нэртэй байна.") 
         return openUsrInfo();
      }
      await user.save();
      alert("Таны мэдээлэл амжилттай хадгалагдлаа");
      console.log("123",error)
      openUsrInfo();
}

解决方法

我做了一些调试。函数 saveUserInfo 可以正常工作，但有一些更改。

请尝试下面的代码，让我知道它是否适合您 --

saveUserInfo = async () => {
      let user = Moralis.User.current(); // delete this if setted globaly
      if (userEmail.value !== user.get("email")){
        user.set('email',userEmail.value); //same changes have applied to the validate email function from user to functin 
      } else {
        alert("duplication email error")
      }
      user.set('username',textUsrName.value);
      if (userAvatarFile.files.length > 0) {
        const avatar = new Moralis.File("avatarprfl.jpg",userAvatarFile.files[0]);
        user.set('avatar',avatar);
      }
      try {
        user.save();
      } catch (error) {
        window.alert("Ижилхэн нэртэй байна.")
        console.log("123",error)
        return openUsrInfo();
      }
      await user.save();
      alert("Таны мэдээлэл амжилттай хадгалагдлаа");
      openUsrInfo();
    }