Rails AJAX a Destroy Action - ajax

Question

I'm trying to use AJAX on a friendships list where the "Request Friendship" button turns into a "Cancel Request" button and then back again if clicked a second time. The first click works, the ajax on the "Cancel Request" button does not.
On line 2 of the destroy.js.erb I get a:
undefined method `id' for nil:NilClass
I know it's not working because the user_id is not passed in the URL for the destroy as it is for the create, but I don't know how to fix it.
Friendships Controller
before_action :authenticate_user!
before_action :set_user, only: [:create]
before_action :set_friendship, only: [:destroy, :accept]
def create
#friendship = current_user.request_friendship(#user)
respond_to do |format|
format.html {redirect_to users_path, notice: "Friendship Requested"}
format.js
end
end
def destroy
#friendship.destroy
respond_to do |format|
format.html {redirect_to users_path, notice: "Friendship Removed"}
format.js
end
end
def accept
#friendship.accept_friendship
#friendship.create_activity key: 'friendship.accepted', owner: #friendship.user, recipient: #friendship.friend
#friendship.create_activity key: 'friendship.accepted', owner: #friendship.friend, recipient: #friendship.user
respond_to do |format|
format.html {redirect_to users_path, notice: "Friendship Accepted"}
format.js
end
end
private
def set_user
#user = User.find(params[:user_id])
end
def set_friendship
#friendship = Friendship.find(params[:id])
end
Create JS
$('.js-not-friend-btn').bind('ajax:success', function() {
$('.action-button-for-<%= #user.id %>').html('<%= j action_buttons(#user) %>');
});
Destroy JS
$('.js-cancel-request-btn').bind('ajax:success', function() {
$('.action-button-for-<%= #user.id %>').html('<%= j action_buttons(#user) %>');
});
Users Helper
def action_buttons(user)
case current_user.friendship_status(user) when "friends"
link_to "Cancel Friendship", friendship_path(current_user.friendship_relation(user)), method: :delete, :remote => true, class: "js-cancel-friendship-btn btn btn-danger btn-xs mr10"
when "pending"
link_to "Cancel Request", friendship_path(current_user.friendship_relation(user)), method: :delete, :remote => true, class: "js-cancel-request-btn btn btn-danger btn-xs mr10"
when "requested"
link_to("Accept Friendship", accept_friendship_path(current_user.friendship_relation(user)), method: :put, :remote => true, class: "js-accept-friendship-btn btn btn-success btn-xs mr10") +
link_to("Decline", friendship_path(current_user.friendship_relation(user)), method: :delete, :remote => true, class: "js-decline-friendship-btn btn btn-default btn-xs mr10")
when "not_friends"
link_to "Add as Friend", friendships_path(user_id: user.id), method: :post, :remote => true, class: "js-not-friend-btn btn btn-success btn-xs mr10"
end
end
Thanks for any help you can offer.

Answer 1

I had to add the following line to my destroy action in order to use #user in the destroy.js.erb:
#user = #friendship.user == current_user ? #friendship.friend : #friendship.user