Rails ajax ActionController::Parameters permitted: false - ruby-on-rails

Question

I'm trying to do a Ajax call that return all of my reviews when click on a link. When I click on the link I'm calling to a method of User model passing a parameter and I receiving this error <ActionController::Parameters {"controller"=>"users", "action"=>"show_all_reviews"} permitted: false>
My user_controller:
class UsersController < ApplicationController
def show
#user = User.find(params[:id])
#my_reviews = #user.my_reviews.where.not(comment: [nil, ""])
#my_reviews = #my_reviews.paginate(:page => params[:page], :per_page => 1)
#friends = #user.get_friends_list
end
def show_all_reviews
#user = User.find(params[:user_id])
#my_reviews = #user.my_reviews.where.not(comment: [nil, ""])
end
private
def user_params
params.require(:user).permit(:description, :phone)
end
end
That's my button that do the Ajax call
<%= link_to 'Mostrar todos los comentarios', '#', remote: true, id: 'show_more_link', data: {user: #user.id} %>
And my jquery function:
$('#show_more_link').on('click', function(event) {
event.preventDefault();
var user_id = $(this).data("user");
console.log(user_id);
$.ajax({
url: "/show_all_reviews",
type: "POST",
data: {
"user_id": user_id,
},
dataType: "json",
success: function(data) {
alert('done');
}
});
});
I add this to routes.rb
get '/show_all_reviews', to: 'users#show_all_reviews', as: :show_all_reviews

Answer 1

You don't need to use $.ajax(). This can be done in simple way: -
Route: -
get '/show_all_reviews/:user_id', to: 'users#show_all_reviews', as: :show_all_reviews
Add path to link_to including remote: true
<%= link_to 'Mostrar todos los comentarios', show_all_reviews_path(user_id: #user.id), remote: true, id: 'show_more_link' %>

Answer 2

You made a mistake. Change type to GET inside your ajax code. As I see in your routes the custom action with GET type.
Or you can also modify approach here. Use namespace.
in your routes.rb add:
namespace :users, path: nil, as: nil do
resources :users, only: [] do
resources :reviews, only: :index
end
end
create new folder under controllers /users. Add new controller there:
controllers/users/reviews_controller.rb
class Users::ReviewsController < ApplicationController
def index
#user = User.find(params[:user_id])
#reviews = #user.my_reviews.where.not(comment: [nil, ""])
render json: #reviews
end
end
inside view file:
<%= link_to 'reviews', user_reviews_path(user), remote: true %>