Firebase newest feed for following users

问题

I'm working with Angularjs and Firebase. Right now I'm new at firebase for this I'm struggling to find solutions for my issues.

Imagine I'm sorting users like this

users:{
    facebook:123456789:{
        blog: [{
            // List of blogs
        }],
        following: [{
            // List of users auth.ids
        }]
    },
    facebook:123456780:{
        blog: [{
            // List of blogs
        }],
        following: [{
            // List of users auth.ids
        }]
    }
}

And getting logged in user blog object and iterating and pushing it to the array like this

var blogRef = new Firebase(FirebaseUrl + "/users/" + authData.uid + "/blog");
var userBlog = $firebaseArray(blogRef);
var userBlogDatas = []
blogRef.limitToLast(10).on("child_added", function(snapshot) {
    var snap = snapshot.val();                
    userBlogDatas.push(snap);
});

So far everything working fine.

But how can i get latest blogposts from feeds from following users. Right now I have some idea which represents getting user blog datas and pushing them into array. I'm not sure is it right way or not...

I also read https://github.com/firebase/firefeed/blob/master/www/js/firefeed.js code but I could not get any information for myself.

Any ideas will be really helpfull.

Thank you

回答1:

There's a couple of ways to do this if I am understanding the question correctly.

One way is that instead of storing the user_id, store the user id as a key and the blog id as the value like

users
    facebook:123456789
        blog
            // List of blogs
        following
            user_id_0: blog_id_x
            user_id_1: blog_id_y

Then you can add an observer to each blog in the following node. You can get the path from the key/value pair. In this case Facebook:123456789 is following:

/users/user_id_0/blog/blog_id_x
/users/user_id_1/blog/blog_id_y

Another option would be to create a child node within the following node that contains two values: the user_id and blog_id.

users
    facebook:123456789
        blog
            // List of blogs
        following
            follow_id_0
              userid: user_id_0
              blog: blog_id_0
            follow_id_1
              userid: user_id_0
              blog: blog_id_1

In this case, facebook:123456789 is following user_id_0's blog 0 and blog 1

Note: user_id_0 and user_id_1 are actually Facebook:abcdefg users id's

来源：https://stackoverflow.com/questions/33593378/firebase-newest-feed-for-following-users