Rails 5.2.1 / Mongoid 7.0.1 incompatibility

numericality.rb

# frozen_string_literal: true

begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  # Activate the gem you are reporting the issue against.
  gem "activemodel", "5.2.1"
  gem "activerecord", "5.2.1"
  gem "mongoid", "7.0.1"
  gem "sqlite3"
end

require "active_model"
require "active_record"
require "mongoid"
require "minitest/autorun"
require "logger"

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :items, force: true do |t|
    t.integer :quantity
  end
end

class Item < ActiveRecord::Base
  validates :quantity,
    numericality: {only_integer: true, greater_than: 0}
end

class Item1
  include ActiveModel::Model
  attr_accessor :quantity
  validates :quantity,
    numericality: {only_integer: true, greater_than: 0}
end

class Item2
  include Mongoid::Document
  field :quantity, type: Integer
  validates :quantity,
    numericality: {only_integer: true, greater_than: 0}
end

class BugTest < Minitest::Test
  def test_active_record
    item = Item.new(quantity: 1)
    assert item.valid?

    item = Item.new(quantity: 'invalid')
    refute item.valid?
    assert_match /not a number/, item.errors.to_a.first
  end

  def test_active_model
    item = Item1.new(quantity: 1)
    assert item.valid?

    item = Item1.new(quantity: 'invalid')
    refute item.valid?
    assert_match /not a number/, item.errors.to_a.first
  end

  def test_mongoid
    item = Item2.new(quantity: 1)
    assert item.valid?

    item = Item2.new(quantity: 'invalid')
    refute item.valid?
    assert_match /not a number/, item.errors.to_a.first
  end
end