Question

I am trying to use the Pagination plugin for backbone.js to create an infinite scroll feature like in Twitter, where clicking the button/link #pagination a will load the next page of results from the backend and append it to the current view PhotoListView.

Problem: I am trying to follow the plugin’s examples here and source here. So far, I manage to get the JSON data data from the backend on clicking the link #pagination a.

How do I make use of the model-view binding of backbone.js to append new views photoListItemView to the view photoListView when the button #pagination a in the view PaginationView is clicked?

I thought that when this.collection.requestNextPage() of method appendRender in paginationView is called, the newly retrieved models will be added to the collection photoCollection which will trigger photoListView‘s this.collection.bind('change', this.render, this); event trigger, causing the newly retrieved models to be appended?

Views

PhotoListView = Backbone.View.extend({
    el: '#photo_list',

    initialize: function() {
        this.collection.bind('change', this.render, this);
        this.collection.bind('add', function() {
            console.log('added to collection');
        }, this);
    },

    render: function() {
        //$(this.el).html('');
        this.collection.each(function(photo, index) {
            if(index % 7 < 3) {
                $(this.el).append(new PhotoListItemView({ model: photo }).render().el);
            } else {
                $(this.el).append(new PhotoListQuadItemView({ model: photo }).render().el);
            }
            console.log('render');
        }, this);
        return this;
    }
});

PhotoListItemView = Backbone.View.extend({
    tagNAme: 'div',
    className: 'photo_box',

    template: _.template( $('#tpl_PhotoListItemView').html() ),

    initialize: function() {
        this.model.bind('destroy', this.close, this);
    },

    render: function() {
        $(this.el).html( this.template( this.model.toJSON() ) );
            console.log('render item');
        return this;
    },

    close: function() {
        this.unbind();
        this.remove();
    }
});

PhotoListQuadItemView = Backbone.View.extend({
    tagNAme: 'div',
    className: 'photo_box',

    template: _.template( $('#tpl_PhotoListQuadItemView').html() ),

    initialize: function() {
        this.model.bind('destroy', this.close, this);
    },

    render: function() {
        $(this.el).html( this.template( this.model.toJSON() ) );
        return this;
    },

    close: function() {
        this.unbind();
        this.remove();
    }
});

PaginationView = Backbone.View.extend({
    el: $('#pagination'),

    events: {
        'click #pagination a': 'appendRender'
    },

    initialize: function() {
        this.render();
    },

    template: _.template( $('#tpl_pagination').html() ),

    render: function() {
        $(this.el).html( this.template() );
    },

    appendRender: function() {
        this.collection.requestNextPage()
            .done(function(data, textStatus, jqXHR) {
                // HOW DO I APPEND THE NEW DATA VIEWS?
        });
    }
});

Collection

PhotoCollection = Backbone.Paginator.requestPager.extend({
    model: Photo,

    paginator_core: {
            dataType: 'json',
            url: 'http://www.domain.com/explore/all?'
        },

    paginator_ui: {
        firstPage: 1,
        currentPage: 1,
        perPage: 7,
        totalPages: 10
    },

    server_api: {
        '$page': function() { return this.currentPage; }
    },

    parse: function (response) {
        return response;
    }

});

Router

var AppRouter = Backbone.Router.extend({
    routes: {
        '': 'explore'
    },

    initialize: function() {

    },

    explore: function() {
        console.log('explore!');
        this.photoList = new PhotoCollection();
        this.paginationView = new PaginationView({ collection: this.photoList });
        var self = this;
        this.photoList.fetch({
            success: function() {
                self.photoListView = new PhotoListView({ collection: self.photoList });
                self.photoListView.render();

            }
        });
    }

});

var app = new AppRouter();
Backbone.history.start();

Answer 1

As Kishore has said. Binded to the reset event and it works now.