ArgumentError in Topics#show Possible Devise error? - ruby-on-rails

Question

I'm a bit of a rails newb here and need some help figuring this out. I have an argument error that is thrown every time I try and create or edit a new "topic."
ArgumentError
Here is the code for the "show:"
<h1><%= #topic.title %></h1>
<%= link_to "Edit", edit_topic_path(#topic), class: 'btn btn-success' %>
<%= link_to "Delete Topic", #topic, method: :delete, class: 'btn btn-danger', data: {confirm: 'Are you sure you want to delete this topic?'} %>
<% if policy(Bookmark.new).create? %>
<%= link_to "New Bookmark", new_topic_bookmark_path(#topic), class: 'btn btn-success' %>
<% end %>
<% #topic.bookmarks.each do |bookmark| %>
<div class="media-body">
<div class="row">
<div class="col-md-2">
<div class="container">
<img src="http://icons.better-idea.org/icon?url=<%= bookmark.url %>&size=120">
<div class="media-heading">
<%= link_to bookmark.name, topic_bookmark_path(#topic, bookmark) %>
</div>
</div>
</div>
</div>
<div class="col-md-1">
<%= render partial: 'likes/like', locals: {bookmark: bookmark} %>
</div>
</div>
<% end %>
Here is the "topics" controller:
class TopicsController < ApplicationController
def index
#topics = Topic.all
end
def show
#topic = Topic.find(params[:id])
end
def new
#topic = Topic.new
end
def create
#topic = Topic.new(topic_params)
if #topic.save
flash[:notice]= "Topic was saved."
redirect_to #topic
else
flash.now[:alert]= "The topic could not be saved. Please try again"
render :new
end
end
def edit
#topic = Topic.find(params[:id])
end
def update
#topic = Topic.find(params[:id])
#topic.assign_attributes(topic_params)
if #topic.save
flash[:notice]= "The topic was saved sucessfully."
redirect_to #topic
else
flash.now[:alert]= "There was an error saving the topic. Please try again."
render :edit
end
end
def destroy
#topic = Topic.find(params[:id])
if #topic.destroy
flash[:notice]= "\"#{#topic.title}\" was deleted successfully."
redirect_to topics_path
else
flash.now[:alert] = "There was an error in deleting this topic."
render :show
end
end
def topic_params
params.require(:topic).permit(:title)
end
end
Update(1): New error after deleting "policy" New Error
Here is the "application policy that uses Pundit:
class ApplicationPolicy
attr_reader :user, :record
def initialize(user, record)
raise Pundit::NotAuthorizedError, "must be logged in" unless user
#user = user
#record = record
end
def index?
false
end
def show?
scope.where(:id => record.id).exists?
end
def create?
user.present?
end
def new?
create?
end
def update?
user.present? && ( record.user == user )
end
def edit?
update?
end
def destroy?
user.present? && (record.user == user)
end
def scope
Pundit.policy_scope!(user, record.class)
end
class Scope
attr_reader :user, :scope
def initialize(user, scope)
#user = user
#scope = scope
end
def resolve
scope
end
end
end

Answer 1

Problem is with Policy made with the Pundit gem. Can you check something called the BookmarkPolicy or something similar, or at least post that here. Did you forget to include Pundit in your controller ?

Answer 2

You're using the Pundit gem but I don't see the authorize method in your controller. From Pundit's documentation:
Supposing that you have an instance of class Post, Pundit now lets you
do this in your controller:
def update
#post = Post.find(params[:id])
authorize #post
if #post.update(post_params)
redirect_to #post
else
render :edit
end
end
The authorize method automatically infers that Post will have a
matching PostPolicy class, and instantiates this class, handing in the
current user and the given record.

Answer 3

The source code in the screenshot and the code you posted is not the same. Your code:
<% if policy(Bookmark.new).create? %>
Screenshot:
<% if (Bookmark.new).create? %>
Rails is correctly reporting that Bookmark.new does not have a create? method, because it's missing the policy() method call.
Is your file saved? Are you sure you're changing the correct file?