AddThis Static, Provided Solution

fb_click_event.js

// ...
  events: {
    'click .facebook-share' : 'postToFeed',
  },

  postToFeed: function() {
    FB.init({appId: fb_app_id, status: true, cookie: true});

    // calling the API ...
    var obj = {
      method: 'feed',
      link: 'http://www.google.com',
      picture: 'http://athena.cornell.edu/images/rovers/rover_sundial.jpg',
      name: 'My text about ' + this.model.get('something_interesting'),
      caption: '',
      description: 'Sweet! This is so great and about something interesting!',
      redirect_uri: 'your redirect URI'
    };

    var self = this;
    FB.ui(obj, function(response) {
      self.callback(response);
    });
  },

  callback: function(response) {
    // callback where you do something with the response
  }

// ...
  var fb_app_id = 'your facebook application id';
// ...

meta_tags.js

// ...

  render: function() {
    this.setMetaTags();
    // ...
  },


  setMetaTags: function() {
    var self, title, url, tags;
    self  = this;
    title = {'metaName': 'property', 'name': 'og:title', 'value': this.model.get('location_from') + ' to ' + this.model.get('location_to')}
    url = {'metaName': 'property', 'name': 'og:url', 'value': app_uri + '/#posts/' + this.model.get('id')}
    tags = [title, url];
    
    _.each(tags, function(item) {
      self.setOrCreateMetaTag(item.metaName, item.name, item.value);
    });
  },

  setOrCreateMetaTag: function(metaName, name, value) {
    var t = 'meta['+metaName+'="'+name+'"]';
    var mt = $(t);
    if (mt.length === 0) {
      t = '<meta '+metaName+'="'+name+'" />';
      mt = $(t).appendTo('head');
    }
    mt.attr('content', value);

    return mt;
  }

// ...

mixin.js

var GeneralMixins = {
  preventHref: function(e) {
    e.preventDefault();
  }
};

// ...
// note: the view is titled ShareLinks
// ...
  events: {
    'click .facebook-share' : 'postToFeed',
    'click a[href="#"]' : 'preventHref'
  }
// ...

_.extend(ShareLinks.prototype, GeneralMixins);

static_solution.html.erb

<!-- AddThis Button BEGIN -->
<div class="addthis_toolbox addthis_default_style addthis_32x32_style">
<a class="addthis_button_preferred_1"></a>
<a class="addthis_button_preferred_2"></a>
<a class="addthis_button_preferred_3"></a>
<a class="addthis_button_preferred_4"></a>
<a class="addthis_button_compact"></a>
<a class="addthis_counter addthis_bubble_style"></a>
</div>
<script type="text/javascript" src="http://s7.addthis.com/js/300/addthis_widget.js#pubid=xa-505de6c2446fedb4"></script>
<!-- AddThis Button END -->

styles.css

.facebook-share { float: left; }
.facebook-share:hover {
  -khtml-opacity: 0.7;
    -moz-opacity: 0.7;
         opacity: 0.7;
          filter: progid:DXImageTransform.Microsoft.Alpha(opacity=(70));   
}
​

updated_static_solution.html.erb

<div class="addthis_toolbox addthis_default_style addthis_32x32_style"
  addthis:url="http://starvingdeveloper.wordpress.com"
  addthis:title="My custom title!"
  addthis:description="Sweet! This is my default text about <%= item.get('something_interesting') %>!">

  <a class="addthis_button_facebook"></a>
  <a class="addthis_button_twitter" 
    addthis:title="Sweet! This is my custom Twitter text about <%= item.get('something_interesting') %>!"></a>
  <a class="addthis_button_linkedin" 
    addthis:description="Sweet! This is my custom LinkedIn text about <%= item.get('something_interesting') %>!"></a>
  <a class="addthis_button_email"></a>
</div>

with_new_fb.html.erb

<div class="addthis_toolbox addthis_default_style addthis_32x32_style"
  addthis:url="http://starvingdeveloper.wordpress.com"
  addthis:title="My custom title!"
  addthis:description="Sweet! This is my default text about <%= item.get('something_interesting') %>!">

  <div id='fb-root'></div>
  <a class="facebook-share" href="javascript:void(0)">
    <img src="http://starvingdeveloper.files.wordpress.com/2012/09/addthis-facebook.png" />
  </a>
  <a class="addthis_button_twitter" 
    addthis:title="Sweet! This is my custom Twitter text about <%= item.get('something_interesting') %>!"></a>
  <a class="addthis_button_linkedin" 
    addthis:description="Sweet! This is my custom LinkedIn text about <%= item.get('something_interesting') %>!"></a>
  <a class="addthis_button_email"></a>
</div>