ECサイト作成中 rails にてLoadError

Question

railsでECサイトを作っていて管理画面から見れる会員一覧ページを製作中です
contorollerでいろいろ定義したのですが、どうやらそれを持ってこれてないみたいで解決方法が分かる方、アドバイスお願いします。
LoadErroor
Unable to autoload constant CustomersController, expected /home/vagrant/work/vagrant/nagano-cake/app/controllers/customers_controller.rb to define it
が出てきてます

class Hosts::CustomersController < ApplicationController
  def index
  	@customers = Customers.all
  end

  def show
  	@customer =Customers.find(params[:id])
  end

  def edit
  	@customer = Customers.find(params[:id])
  end

  def update
  	@customer =Customer.find(params[:id])
  	if @customer.update(params_customer)
  		redirect_to host_customer_path(@customer)
  	else
  		render 'edit'
  	end
  end

  private
  def params_customer
  	params.require(:customer).permit(
  		:family_name,
  		:first_name,
  		:family_name_kana,
  		:first_name_kana,
  		:postal_code,
  		:address,
  		:phone_number,
  		:email,
  		)
  end


end

<div class="container">
  <div class="row">
    <h3 class="login-title col-xs-offset-2">会員一覧</h3>
    <table class="table table-bordered">
				<thead>
						<th>会員ID</th>
						<th>氏名</th>
						<th>メールアドレス</th>
						<th>ステータス</th>
				</thead>
				<tbody>
					<%= @customers.each do |customer| %>
					  <tr>
						<td><%= customer.id %></td>
						<td>
							<%= link_to  hosts_customer_path(customer) do %>
							<%= customer.family_name%><%= customer.first_name %>
						</td>
						<td><%= customer.email %></td>
						<td>
							<% if customer.is_deleted ==true %>
							有効
							<% else %>
							退会済み
							<% end %>
						</td>
					  </tr>
					<% end %>
				</tbody>
			</table>
		</div>
	</div>

class Host < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable
end

# This file is auto-generated from the current state of the database. Instead
# of editing this file, please use the migrations feature of Active Record to
# incrementally modify your database, and then regenerate this schema definition.
#
# Note that this schema.rb definition is the authoritative source for your
# database schema. If you need to create the application database on another
# system, you should be using db:schema:load, not running all the migrations
# from scratch. The latter is a flawed and unsustainable approach (the more migrations
# you'll amass, the slower it'll run and the greater likelihood for issues).
#
# It's strongly recommended that you check this file into your version control system.

ActiveRecord::Schema.define(version: 2020_08_18_044619) do

  create_table "customers", force: :cascade do |t|
    t.string "email", default: "", null: false
    t.string "encrypted_password", default: "", null: false
    t.string "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "family_name", null: false
    t.string "first_name", null: false
    t.string "family_name_kana", null: false
    t.string "first_name_kana", null: false
    t.string "postal_code", null: false
    t.string "address", null: false
    t.string "phone_number", null: false
    t.boolean "is_deleted", default: false, null: false
    t.index ["email"], name: "index_customers_on_email", unique: true
    t.index ["reset_password_token"], name: "index_customers_on_reset_password_token", unique: true
  end

  create_table "hosts", force: :cascade do |t|
    t.string "email", default: "", null: false
    t.string "encrypted_password", default: "", null: false
    t.string "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.index ["email"], name: "index_hosts_on_email", unique: true
    t.index ["reset_password_token"], name: "index_hosts_on_reset_password_token", unique: true
  end

  create_table "items", force: :cascade do |t|
    t.integer "genre_id"
    t.string "name"
    t.text "description"
    t.integer "non_tax_price"
    t.string "image_id"
    t.boolean "is_active"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

end

Answer 1

Unable to autoload constant CustomersController,
つまり CustomersController　が欲しいのに定義されているのは
class Hosts::CustomersController

なのでそうなります。
app/controllers/customers_controller.rb
に定義するなら　Hosts::　なしの　CustomersController　でなければなりません。
rails では class名とそれを定義するfile名は（あるルール下で）一致している必要があります