I have a product, user, and like model. A user can like a product. I am trying to implement a simple like button which, upon a click, allows a user to like a product. Then the like button transforms into an unlike button, allowing the user to unlike a product. Pretty straightforward.
I have implemented the model/controller logic for the above. I am not very good with javascript/ajax and was wondering what the best way would be to implement the above functionality. I want the like/unlike actions to be handled via ajax. I am using rails 3 and jquery ujs for my app.
Thanks.
My answer to your question is long, so I wrote up an example application. Here's a snippet:
There are many ways to skin this cat, but I like to render a partial and a single ujs template.
_like_button.html.erb
:
<% if like = current_user.likes.find_by_product_id(@product.id) %>
<%= form_for like, :html => { :method => :delete },
:remote => true do |f| %>
<%= f.submit "Unlike" %>
<% end %>
<% else %>
<%= form_for current_user.likes.build(:product_id => @product.id), :remote => true do |f| %>
<%= f.hidden_field :product_id %>
<%= f.hidden_field :user_id %>
<%= f.submit "Like" %>
<% end %>
<% end %>
toggle.js.erb
, where "#like"
is the div enclosing the form:
$("#like").html("<%= escape_javascript render('like_button') %>");