add trailing slash to Backbone.Model urls

gistfile1.js

// example

User = Backbone.Model.extend({
    url: function() {
        var origUrl = Backbone.Model.prototype.url.call(this);
        return origUrl + (origUrl.charAt(origUrl.length - 1) == '/' ? '' : '/');
    }
});

Here is a combination of above answers that worked for me

var _sync = Backbone.sync;
Backbone.sync = function(method, model, options){

    // Add trailing slash to backbone model views
    var _url = _.isFunction(model.url) ?  model.url() : model.url;
    _url += _url.charAt(_url.length - 1) == '/' ? '' : '/';

    options = _.extend(options, {
        url: _url
    });

    return _sync(method, model, options);
};

Here is a version, that handles GET params in correct way

var _sync = Backbone.sync;
Backbone.sync = function(method, model, options){
    // Add trailing slash to backbone model views
    var parts = _.result(model, 'url').split('?'),
        _url = parts[0],
        params = parts[1];

    _url += _url.charAt(_url.length - 1) == '/' ? '' : '/';

    if (!_.isUndefined(params)) {
        _url += '?' + params;
    };

    options = _.extend(options, {
        url: _url
    });

    return _sync(method, model, options);
};