where.not

where clauses can be negated using the where.not syntax:

class Person < ApplicationRecord#attribute :first_name, :stringendpeople = Person.where.not(first_name: ['Mark', 'Mary'])# => SELECT "people".* FROM "people" WHERE "people"."first_name" NOT IN ('Mark', 'Mary')

Supported by ActiveRecord 4.0 and later.

Found a mistake? Have a question or improvement idea? Let me know.

ActiveRecord:

*ActiveRecord

*Creating a Model via generator

*.where

*.where with an array

*Scopes

*Creating a Model manually

*Introduction to Callbacks

*where.not

*Manually Testing Your Models

*Creating A Migration

*Create a Join Table using Migrations

*Using a model instance to update a row

*when record not found

Table Of Contents

0Getting started with Ruby on Rails

1Routing

2ActiveRecord

3Views

4ActiveRecord migrations

5Rails best practices

6Naming conventions

7ActionCable

8ActiveModel

9User Authentication in Rails

10ActiveRecord Associations

11ActiveRecord validations

12ActiveRecord Query Interface

13ActionMailer

14Rails generate commands

15Configuration

16I18N - internalization

17Using Google Maps with Rails

19Caching

23Rails 5

24Authorization with CanCan

25Mongoid

26Gems

27Change default timezone

28Asset pipeline

29Upgrading Rails

30ActiveRecord locking

31Debugging

32Configure Angular with Rails

33Rails logger

34Prawn PDF

35Rails API

36Deploying a Rails app on Heroku

37ActiveSupport

38Form Helpers

39ActiveRecord transactions

40RSpec and Ruby on Rails

45Multi-purpose ActiveRecord columns

46Class organization

47Shallow Routing

48Model states AASM

49Rails 5 API Authentication

50Testing Rails Applications

51Active Jobs

52Rails frameworks over the years

53Nested form

54Factory Girl

55CSV

56Tools for code optimization and cleanup

57ActiveJob

58Active Model serializers

59Rails Engine - Modular Rails

60Single Table inheritance

61ActiveRecord transactions

62Turbolinks

63Friendly ID

64Securely storing authentications keys

65Authenticate API using Devise

66Integrating React.js with Rails using Hyperloop

67Change a default Rails application environment

68Reserved words

69Rails-Engines

70Adding an Amazon RDS

71Payment features in Rails

72Rails on docker

73Contributors