/gems/sequel-3.38.0/lib/sequel/model/base.rb:1756:in `block in set_restricted': shopper is a restricted column (Sequel::Error)

restrictedcolumn.rb

# You just need sequel, fabrication, ffaker, and sqlite3 gems

require 'sequel'
require 'sqlite3'
require 'logger'
require 'fabrication'
require 'ffaker'

DB = Sequel.sqlite
# DB.loggers << Logger.new($stdout)

Sequel::Model.raise_on_save_failure = false

DB.instance_eval do
  create_table :orders do
    primary_key :id
    Integer :quantity
    Integer :price_in_cents
    foreign_key :shopper_id, :shoppers
  end

  create_table :shoppers do
    primary_key :id
    String :email
  end
end

class Order < Sequel::Model
  many_to_one :shopper
  set_allowed_columns :quantity, :price_in_cents
end

class Shopper < Sequel::Model
  one_to_many :orders
end

Fabricator :order do
  quantity          { rand 1..10 }
  price_in_cents    { rand 100..999_99 }
  shopper
end

Fabricator :shopper do
  email { Faker::Internet.email }
end

shopper = Fabricate(:shopper)
order = Fabricate(:order)