我正在尝试通过与Rails 5的关联使用has_many。在保存“类别”时遇到此错误。

CategoriesController＃create中的activeModel :: MissingAttributeError

无法写入未知属性followings_count

以下型号：

class Following < ApplicationRecord  
  belongs_to :category,touch: true,counter_cache: true
  belongs_to :followed_category,counter_cache: :followers_count,class_name: 'Category'
end

类别模型：

class Category < ApplicationRecord
    has_many :followings
    has_many :followed_categories,through: :followings
    
    has_many :followers,foreign_key: :followed_category_id,class_name: 'Following'
    has_many :follower_categories,through: :followers,source: :category
end

类别控制器：

class CategoriesController < InheritedResources::Base
  private
    def category_params
      params.require(:category).permit(:name,:description,:display_in_navbar,post_ids: [],followed_category_ids: [])
    end
end

_form.html.rb

<%= simple_form_for(@category) do |f| %>
  <%= f.error_notification %>
  <%= f.error_notification message: f.object.errors[:base].to_sentence if f.object.errors[:base].present? %>

  <div class="form-inputs">
    <%= f.input :name %>
    <%= f.association :followed_categories,as: :check_boxes %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>