Favouriting a picture in a Rails app -

i trying figure out how execute "favourite picture" method in rails app, new to, going js/meteor background.

the point have user, favpic, pic classes:

class user < activerecord::base   #some user oauth stuff here    has_many :fav_pics   has_many :pics_favorited,     class_name: 'pic',     through: :fav_pics  end  class favpic < activerecord::base   belongs_to :user   belongs_to :pic end  class pic < activerecord::base   has_many :fav_pics   has_many :fav_users,     class_name: 'user',     through: :fav_pics end 

and here's template:

<% if current_user %>   <%= form_tag(root_path, :method => "get") %>     <p>       <%= text_field_tag :username, params[:username] %>       <%= submit_tag "search", :name => nil %>     </p>   <% end %>    <ul>     <% @mentions.each |mention| %>       <li>         <%= mention.text %>         <div class="row">         <% mention.media.each |media| %>            <div class="col-xs-3">             <%=image_tag(media.media_url, class:"img-responsive")%>             <a href="#" class="fav-img"><i class="fa fa-star fa-2x"></i></a>           </div>          <% end %>         </div>       </li>     <% end %>   </ul> <% else %>   <p>     sign in able use app.   </p> <% end %> 

current_user user signed in through twitter , @mentions list of tweets has username inputed in form mentioned. media.media_url picture url associated tweet.

i trying link (or whatever way it's done in rails) add media url db can list images @ separate url.

you've got choice: change <a href="#"> form, or have action link include url encoded url parameter. either way, can still use ajax invoke call server.

your server have action on controller accepted appropriate call mark favorite. since don't have controller code listed let's call piccontroller i'm assuming pic class has url property on it.

i highly recommend primer: http://guides.rubyonrails.org/association_basics.html , basic http://guides.rubyonrails.org/getting_started.html covers how action links , forms.

class piccontroller < applicationcontroller     def favorite         pic = pic.find(params[:url])          favorite = favpic.new         favorite.pic = pic         favorite.user = current_user # @ this...         favorite.save          pic.fav_users.add(favorite)         pic.save          current_user.fav_pics.add(favorite)         current_user.save     end end 

the above code covers how create new favpic instance , save appropriately.