为什么不在 Cloud Firebase 中创建新集合？

Question

I've returned a promise 'db' to access the collection. The collection doesn't exist yet because when I allow the user to signup Firebase should automatically create the collection. I then created a doc by passing in a id so when I save to that document it's going to create an autoid for that document.

I then set a property called email and then passed the email value to this. Now the document will have the same id as the users.

The problem is it isn't creating a new collection, any ideas?

   function signup(){

  var userEmail = document.getElementById("email_field").value;
  var userPass = document.getElementById("password_field").value;

  firebase.auth().createUserWithEmailAndPassword(userEmail, userPass)(cred => {
    return db.collection('users').doc(cred.user.uid).set({
      email: document.getElementById("email_field").value
    }).then
  })
  .catch(function(error) {
    // Handle Errors here.
    var errorCode = error.code;
    var errorMessage = error.message;
    window.alert("Error : " + errorMessage);
    // ...
  });
}

Here is what I set in Cloud Firebase Rules and allowed documents to be created:

service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write;
    }
}
}

Answer 1

If you are not able to see any errors when calling the set method, I'd suggest you to use the firebase authenticatio triggers (to keep some logic separated and not a lot of promises in your current implementation)in that way you can make reference to the user information with the parameter that is given at the trigger

PS: do you need that "then" at the db invocation? (as doug has mentioned on his comment)