Why is the document not being published from the collection?

Question

MongoDB

Good afternoon.
When a collection is published, it is not passed to the client.
Publishing occurs in the following way

Meteor.publish('battles', function ()
{
    var x=this.user().username;
    return battles.find({ $or: [ { name1: x}, { name2: x} ] },{fields:{name1:1,name2:1,battleID:1}})
});

At the same request, the correct document is displayed in the database console. When the code is executed on the site or when requested through the browser console, undef is returned without a document.
The user is logged in, there are documents in the collection that satisfy the condition by name for this user.

Answer 1

Unfinished address to the field is all to blame

Meteor.publish('battles', function ()
{
    var x = Meteor.users.findOne({_id: this.userId});
    return battles.find({ $or: [ { name1: x.username}, { name2: x.username} ] },{fields:{name1:1,name2:1,battleID:1}});
});