Question

我正在创建一个应用程序，其中使用frontend中的reactjs和firebase作为后端注册用户数据。我可以将数据保存到firebase。我可以编辑和删除数据，但无法将编辑后的数据保存到firebase。我该怎么做才能编辑数据？我使用了Dim emptyRow As Long, addr as string emptyRow = Range("Z100000").End(xlUp).Offset(1, 0).Row addr = Cells(emptyRow,40).Address() Cells(emptyRow, 43).Formula = "=IF(" & addr & "=0, """", VLOOKUP(" & _ addr & ",'Job Category'!$G$10:$I$12, 3, TRUE))"但仍然没有用。

child_changed

Answer 1

根据文件：https://www.firebase.com/docs/web/guide/
var ref = new Firebase（＆＃34; https://docs-examples.firebaseio.com/web/saving-data/fireblog＆＃34;）;

//suppose you have similar kind of data in your data base which was created like this

var usersRef = ref.child("users");
usersRef.set({
  alanisawesome: {
    date_of_birth: "June 23, 1912",
    full_name: "Alan Turing"
  },
  gracehop: {
    date_of_birth: "December 9, 1906",
    full_name: "Grace Hopper"
  }
});

//then to change data 

usersRef.child("alanisawesome").set({
  date_of_birth: "June 23, 1912",
  full_name: "Alan Turing"
});
usersRef.child("gracehop").set({
  date_of_birth: "December 9, 1906",
  full_name: "Grace Hopper"
});

//remember that using 'set' causes overwrite data at that localtion to avoid this you can also use 'update' . like if your db looks like this

{
  "users": {
    "alanisawesome": {
      "date_of_birth": "June 23, 1912",
      "full_name": "Alan Turing",
      "nickname": "A Machine"
    },
    "gracehop": {
      "date_of_birth": "December 9, 1906",
      "full_name": "Grace Hopper",
      "nickname": "A Grace"
    }
  }
}


//then you can do this

usersRef.update({
  "alanisawesome/nickname": "Alan The Machine"
  "gracehop/nickname": "Amazing Grace"
});

Answer 2

您可以在loadData函数中保存id来获取id。所以你可以这样做

saveUser(oldUser, newUser){
    console.log('olduser',oldUser);
    console.log('newuser', newUser);
    // TODO - optimize this code
    const foundUser = _.find( this.state.userInfo, user =>
        user.name === oldUser.name
    );
    const foundContact = _.find( this.state.userInfo, user =>
        user.contact === oldUser.contact
    );
    const foundAddress = _.find( this.state.userInfo, user =>
        user.address === oldUser.address
    );
    const foundEmail = _.find( this.state.userInfo, user =>
        user.email === oldUser.email
    );
    const foundUsername = _.find( this.state.userInfo, user =>
        user.username === oldUser.username
    );
    const foundPassword = _.find( this.state.userInfo, user =>
        user.password === oldUser.password
    );
    console.log('foundUser', foundUser);
    console.log('foundUser.name',foundUser.name);
    foundUser.name = newUser.name;
    foundContact.contact = newUser.contact;
    foundAddress.address = newUser.address;
    foundEmail.email = newUser.email;
    foundUsername.username = newUser.username;
    foundPassword.password = newUser.password;
  }
const editUserRef = new Firebase('https://***.firebaseio.com/users').child(oldUser.id);
console.log('edit',editUserRef);
editUserRef.update(foundUser);

使用reactjs将编辑后的数据保存到firebase

2 个答案: