link_to not passing params properly - ruby-on-rails

Question

the view
<td><%= link_to "+1", :controller => :profiles, :action => :addpoints, :profile_id => profile.id, :task_id => #task.id%></td>
When trying to access profile.id via :profile_id rails returns an error, the id was not passed at all. How do I fix this? What's the best way to pass two params through two models? rake routes
Prefix Verb URI Pattern Controller#Action
welcome_index GET /welcome/index(.:format) welcome#index
static_pages_home GET /static_pages/home(.:format) static_pages#home
static_pages_dashboard GET /static_pages/dashboard(.:format) static_pages#dashboard
static_pages_pending GET /static_pages/pending(.:format) static_pages#pending
static_pages_taskcompleted GET /static_pages/taskcompleted(.:format) static_pages#taskcompleted
tasks_index GET /tasks/index(.:format) tasks#index
tasks_complete GET /tasks/complete(.:format) tasks#complete
tasks_delete GET /tasks/delete(.:format) tasks#delete
profiles_addpoints GET /profiles/addpoints(.:format) profiles#addpoints
profiles_index GET /profiles/index(.:format) profiles#index
root GET / static_pages#home
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) devise/sessions#destroy
user_password POST /users/password(.:format) devise/passwords#create
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
PATCH /users/password(.:format) devise/passwords#update
PUT /users/password(.:format) devise/passwords#update
cancel_user_registration GET /users/cancel(.:format) devise/registrations#cancel
user_registration POST /users(.:format) devise/registrations#create
new_user_registration GET /users/sign_up(.:format) devise/registrations#new
edit_user_registration GET /users/edit(.:format) devise/registrations#edit
PATCH /users(.:format) devise/registrations#update
PUT /users(.:format) devise/registrations#update
DELETE /users(.:format) devise/registrations#destroy
tasks GET /tasks(.:format) tasks#index
POST /tasks(.:format) tasks#create
new_task GET /tasks/new(.:format) tasks#new
edit_task GET /tasks/:id/edit(.:format) tasks#edit
task GET /tasks/:id(.:format) tasks#show
PATCH /tasks/:id(.:format) tasks#update
PUT /tasks/:id(.:format) tasks#update
DELETE /tasks/:id(.:format) tasks#destroy
profiles GET /profiles(.:format) profiles#index
POST /profiles(.:format) profiles#create
new_profile GET /profiles/new(.:format) profiles#new
edit_profile GET /profiles/:id/edit(.:format) profiles#edit
profile GET /profiles/:id(.:format) profiles#show
PATCH /profiles/:id(.:format) profiles#update
PUT /profiles/:id(.:format) profiles#update
DELETE /profiles/:id(.:format) profiles#destroy

Answer 1

Replace profile.id with #profile.id. Verify that profile is actually an instance. A nil value may be being passed in (as opposed to things being wired incorrectly).

Answer 2

Can we see the method content ?
If the error is about the id, the route is correct. What's in params[:profile_id] ? We need more info here..

Answer 3

I think this is what you wanted to do in Rails 4 way.
<%= link_to "+1", profiles_addpoints_path(:profile_id => profile.id, :task_id => #task.id) %>
That code above will call addpoints method in profiles controller with parameter {:profile_id => profile.id, :task_id => #task.id}. You can access parameter like this.
params[:profile_id] and params[:task_id].
Another thing that's worrysome about your code is that in the routes.rb, profiles_addpoints route is called via GET HTTP verb. This is potentially dangerous because Google search bots will visit these paths and result in a spike in upvotes. Respect HTTP convention and use PUT.