undefined method `amoeba' rails 5.2

Question

I'm following this tutorial for implementing a bookingsystem to my rails app. I'm currently stuck, because when I hit the 'New booking' button I get this error

undefined method `amoeba' for #<Class:0x00007fa37f7862a0>

![NoMethodError in BookingsController#create ]1

I have included gem 'amoeba' in my gem file, but it still doesn't work. Anyone know how to fix it? It would be very much appreciated.

schedule.rb

class Schedule < ApplicationRecord

  # Tenant Of
  belongs_to :account, :inverse_of => :schedules
  accepts_nested_attributes_for :account

  belongs_to :practitioner, :inverse_of => :schedules
  accepts_nested_attributes_for :practitioner

  has_many :bookings, :inverse_of => :schedule
  accepts_nested_attributes_for :bookings

  validates :start, uniqueness: { scope: :practitioner_id, message: "You have already made this time available" }

  amoeba do
    enable
    exclude_associations :bookings
  end

end

bookings_controller.rb

class BookingsController < ApplicationController
  before_action :set_booking, only: [:show, :edit, :update, :destroy]

  # GET /bookings
  # GET /bookings.json
  def index
    @bookings = Booking.all
  end

  # GET /bookings/1
  # GET /bookings/1.json
  def show
  end

  # GET /bookings/new
  def new
    @booking = Booking.new
  end

  # GET /bookings/1/edit
  def edit
  end

  # POST /bookings
  # POST /bookings.json
  def create
    @booking = Booking.new(booking_params)

    respond_to do |format|
      if @booking.save
        format.html { redirect_to @booking, notice: 'Booking was successfully created.' }
        format.json { render :show, status: :created, location: @booking }
      else
        format.html { render :new }
        format.json { render json: @booking.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /bookings/1
  # PATCH/PUT /bookings/1.json
  def update
    respond_to do |format|
      if @booking.update(booking_params)
        format.html { redirect_to @booking, notice: 'Booking was successfully updated.' }
        format.json { render :show, status: :ok, location: @booking }
      else
        format.html { render :edit }
        format.json { render json: @booking.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /bookings/1
  # DELETE /bookings/1.json
  def destroy
    @booking.destroy
    respond_to do |format|
      format.html { redirect_to bookings_url, notice: 'Booking was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_booking
      @booking = Booking.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def booking_params
      params.require(:booking).permit(:status, :title, :cost, :start, :cancellation_reason, :refunded, :practitioner_id, :schedule_id, :lesson_id, :account_id)
    end
end

Log

Started POST "/bookings" for ::1 at 2020-03-23 12:42:06 +0100
Processing by BookingsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"IE78VI28UqOkuhXUnyY5bdvsN1S4wHw38Uu5BTZ+7ZdT0+6Ii50EThTELTiUWHuQOsOjy+MO4Dw6HyOwxJwWEw==", "booking"=>{"status"=>"Testing", "title"=>"Testing title", "cost"=>"3", "start(1i)"=>"2020", "start(2i)"=>"3", "start(3i)"=>"23", "start(4i)"=>"11", "start(5i)"=>"39", "cancellation_reason"=>"", "refunded"=>"0", "practitioner_id"=>"2", "schedule_id"=>"-1", "lesson_id"=>"2", "account_id"=>"1"}, "commit"=>"Create Booking"}
  User Load (1.4ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 104 ORDER BY `users`.`id` ASC LIMIT 1
  ↳ /Users/kaspervalentin/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activerecord-5.2.4.1/lib/active_record/log_subscriber.rb:98
   (0.3ms)  BEGIN
  ↳ app/controllers/bookings_controller.rb:30
  Account Load (0.4ms)  SELECT  `accounts`.* FROM `accounts` WHERE `accounts`.`id` = 1 LIMIT 1
  ↳ app/controllers/bookings_controller.rb:30
  Lesson Load (0.4ms)  SELECT  `lessons`.* FROM `lessons` WHERE `lessons`.`id` = 2 LIMIT 1
  ↳ app/controllers/bookings_controller.rb:30
   (0.3ms)  ROLLBACK
  ↳ app/controllers/bookings_controller.rb:30
Completed 500 Internal Server Error in 63ms (ActiveRecord: 2.8ms)



NoMethodError (undefined method `amoeba' for #<Class:0x00007fa37f7862a0>):

app/models/schedule.rb:15:in `<class:Schedule>'
app/models/schedule.rb:1:in `<main>'
app/controllers/bookings_controller.rb:30:in `block in create'
app/controllers/bookings_controller.rb:29:in `create'

Answer 1

First of all try to inherit your model class from ActiveRecord::Base also when you are using amoeba in model you can avoid enable method which you called in amoeba do block cause you don't need to write enable if you are using somth like include_association or exclude_association