Getting the Data in snapshot.val() but not able to treat it-CodePudding

I was making an app and had to fetch data from Realtime Database. I am getting the data in snapshot.val() like this

►{xz0ezxzrpkb:{…}}
▼xz0ezxzrpkb:{blood_group:"B ",cause:"Random Cause",created_on:"08-02-2022",email:"[email protected]",location:"Random Location",message:"Random Message",name:"Any_Name",phone_number:" 91 *********"}

And Now I want to access this data. When I am trying snapshot.val()[0].email and
snapshot.val().[0].email I am Getting

undefined (2)

So, I am working in React Native and this is the code

db.ref('/requests/').on('value', (snapshot) => {
       console.log(snapshot.val())
       console.log(snapshot.val()[0].email)
       console.log(snapshot.val().[0].email)
});

Please help me out.

CodePudding user response：

The snapshot value is not an object. Try refactoring the code using Object.keys() as shown below:

db.ref('/requests/').on('value', (snapshot) => {
  Object.keys(snapshot.val()).forEach((key) => {
    const request = snapshot.val()[key];
    console.log(key, request.email)
  })
});

CodePudding user response：

While the approach in Dharmaraj's answer works, I recommend using Firebase's built-in forEach operation, since that ensures that you process the results in the same order the database returns them:

db.ref('/requests/').on('value', (snapshot) => {
  snapshot.forEach((childSnapshot) => {
     console.log(childSnapshot.key)                  // "xz0ezxzrpkb"
     console.log(childSnapshot.val())                // {blood_group:"B ",cause:"Random Cause", ...
     console.log(childSnapshot.val().email)          // "[email protected]"
     console.log(childSnapshot.child('email').val()) // "[email protected]"
  })
})