title: Rails : Wrong number of arguments (given 1, expected 0)
body: <p>I get this error on my <code>posts</code> index page :</p>
  
  <p><a href="https://i.stack.imgur.com/QaXGQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QaXGQ.png" alt="enter image description here"></a></p>
  
  <p>This the model :</p>
  
  <pre><code>class Post &lt; ApplicationRecord
  
    include Filterable
  
    belongs_to :region
    belongs_to :category
    belongs_to :topic
    validates :title, presence: true, length: { maximum: 500 }
    validates :content, presence: true
    validates :published_at, presence: true
    translates :title, :content, :slug, touch: true, fallbacks_for_empty_translations: true
    has_attached_file :image, styles: { thumb: "100x70#", featured: "1560x868#", small: "760x868#", big: "&gt;1600x1600" }
    validates_attachment :image, content_type: { content_type: ["image/jpeg", "image/gif", "image/png"] }
    validates_attachment_presence :image
  
    scope :published, -&gt; (published) { where(published: (['true', true].include? published)).order(featured: :desc, published_at: :desc) }
    scope :published_until_now, -&gt; { where("published_at &lt; ?", Time.now).merge(Post.published(true)) }
    scope :topic, -&gt; (topic_id) {
      joins(:topic).where('topic_id = ?', topic_id) }
    scope :category, -&gt; (post_category) {
      joins(:category).where('category_id = ?', post_category) }
    scope :match, -&gt; (search_term) {
      with_translations(I18n.locale).where('content like ? or title like ?', "%#{search_term}%", "%#{search_term}%") }
  
    self.per_page = 10
  
    after_save :unfeature_older_posts, if: Proc.new { |post| post.featured? }
  
    extend FriendlyId
    friendly_id :title, use: :globalize
  
    def unfeature_older_posts
      featured_posts = Post.where(featured: true).where.not(id: id).order(published_at: :desc)
      if featured_posts.size == 1
        featured_posts.last.update(featured: false)
      end
    end
  
  end
  </code></pre>
  
  <p>This the controller :</p>
  
  <pre><code>class PostsController &lt; ApplicationController
  
    before_action :get_pages_tree, :get_privacy_policy, only: [:index, :show]
  
    def index
      @filters = params.slice(:topic, :category)
      @posts = Post.published_until_now
        .filter(@filters)
        .paginate(:page =&gt; params[:page], per_page: 11)
    end
  
    def show
      @post = Post.friendly.find(params[:id])
    end
  end
  </code></pre>
  
  <p>and <code>filter</code> is defined here :</p>
  
  <pre><code>module Filterable
    extend ActiveSupport::Concern
  
    module ClassMethods
      def filter(filtering_params)
        results = self.where(nil)
        filtering_params.each do |key, value|
          results = results.public_send(key, value) if value.present?
        end
        results
      end
    end
  end
  </code></pre>
  
  <p>I'm not sure where to go from here. I recently upgraded to Ruby on Rails 5 and Ruby 2.7.0, I don't know if it's related.</p>