How to make a filter with != or Isnotiqualto in the Firestore?

Question

Hello!

I need to make an appointment with filter on firestore but I read in the documentation that they do not have "!=" or "Isnotiqualto" to create a restriction. I wanted to do something like:

Search for books that are not registered with the user’s email.

var snapshots = Firestore.instance
    .collection('livros')
    .where('email', isNotEqualTo: _email )
    .snapshots();

Does anyone have any suggestions?

Answer 1

It is now possible to use the "not Equal" query in the firestore. basically use collection('colecao').where('campo', '!=', 'valor');

read more on: https://firebase.googleblog.com/2020/09/cloud-firestore-not-equal-queries.html

Answer 2

Just use:

var snapshots = Firestore.instance
.collection('livros')
.where('email', '!=', _email )
.snapshots();