Javascript 在firebase.push（）之后读取创建的密钥和数据 我的问题

我已经读了好几篇关于这方面的问答（比如），但无法使我的代码正常工作

我想做什么 在

firebase.push

之后，获取创建的密钥并读取

push

调用中写入的数据

代码如下： 现在，在'id'变量中有了自动生成的键，在'body'变量中有了推送的数据

希望有帮助

addCard = async ({
    number, expMonth, expYear, cvc,
  }) => {
    this.setState({ addingCardInProcess: true });
    try {
      const tokenObject = await stripe.createTokenWithCard({
        number, expMonth, expYear, cvc
      });
      firebase
        .database()
        .ref(`/stripe_customers/${uid()}/sources`)
        .push({ token: tokenObject.tokenId })
        .then(() => {
          // I want to get the key and read the pushed data here.
          // How do I do it? 
          this.setState({ addingCardInProcess: false });
          this.cardAlert(true);
        })
        .catch((err) => {
          this.setState({ addingCardInProcess: false });
          this.cardAlert(false, err.message);
        });
    } catch(err) {
      this.cardAlert(false, err.message);
      this.setState({ addingCardInProcess: false })
    }
  };

addCard = async ({
    number, expMonth, expYear, cvc,
}) => {
this.setState({ addingCardInProcess: true });
try {
  const tokenObject = await stripe.createTokenWithCard({
    number, expMonth, expYear, cvc
  });
  let id = firebase.database().ref().push().key;
  let body = { token: tokenObject.tokenId };
  firebase
    .database()
    .ref(`/stripe_customers/${uid()}/sources`).child(id)
    .set(body)
    .then(() => {
      // I want to get the key and read the pushed data here.
      // Now you have your key here in "id" variable and data in "body" variable
      this.setState({ addingCardInProcess: false });
      this.cardAlert(true);
    })
    .catch((err) => {
      this.setState({ addingCardInProcess: false });
      this.cardAlert(false, err.message);
    });
} catch(err) {
  this.cardAlert(false, err.message);
  this.setState({ addingCardInProcess: false })
}
};