🐙 FakerElixir

FakerElixir is an Elixir package that generates fake data for you. Whether you need to seed your database, create factories for your project, FakerElixir is here for you 👊.

If you like this library ... you could star it 🌟

Installation

Can't wait to generate some fake data ? Follow the steps:

Add faker_elixir_octopus to your list of dependencies in mix.exs:

def deps do
  [{:faker_elixir_octopus, "~> 1.0.0",  only: [:dev, :test]}]
end

Ensure faker_elixir_octopus is started before your application:

def application do
  [applications: [:faker_elixir_octopus]]
end

Note: This step can be skipped if you are using Elixir 1.4+ (see CHANGELOG#application-inference).

Run in the root of your project:

$ mix deps.get

Faker Elixir is now a part of your application and ready to use!

Usage

Since I'm quite sure you are using Phoenix, I will show you a basic example:

defmodule Zombie.AwesomeController do
  use Zombie.Web, :controller

  def index(conn, _params) do
    text conn, FakerElixir.Helper.pick(["zombie", "human"])
  end
end

Now if you keep refreshing your browser, the value should change. Awesome, you just understood how to use Faker 👏.

💬 "Sounds cool, but what about that `FakerElixir` namespace, it's quite boring to write that everytime 😕"

You are right, you could use alias of elixir:

defmodule Zombie.AwesomeController do
  use Zombie.Web, :controller

  alias FakerElixir, as: Faker

  def index(conn, _params) do
    text conn, Faker.Helper.pick(["zombie", "human"])
  end
end

💬 "I followed the steps to install the package, but it doesn't work 😠 !!"

I guess you have an error similar to something .... Store.has?() ..... something. Well you just forgot to add :faker_elixir_octopus:

# mix.exs file

  def application do
    [mod: {Test, []},
     applications: [:phoenix, :phoenix_html, :cowboy, :logger, :gettext,
                    :phoenix_ecto, :postgrex, :faker_elixir_octopus]] # <---- here
  end

Cheatsheet

Each functions of FakerElixir are well documented here: documentation.

But I know you, you will forget the syntax to generate a city and so on ... Don't waste your time in the documentation, just use this simple cheatsheet:

Faker.Address
Faker.App
Faker.Avatar
Faker.Bank
Faker.Boolean
Faker.Color
Faker.Commerce
Faker.Crypto
Faker.Currency
Faker.Date
Faker.File
Faker.Helper
Faker.Internet
Faker.Lorem
Faker.Name
Faker.Number
Faker.Phone

FakerElixir.Address

FakerElixir.Address.building_number # "542"
FakerElixir.Address.city # "Portland"
FakerElixir.Address.country # "Iceland"
FakerElixir.Address.country_code # "NY"
FakerElixir.Address.latitude # -71.67369045432866
FakerElixir.Address.longitude # -114.67722189422487
FakerElixir.Address.make_country # %{code: "MY", name: "Malaysia"}
FakerElixir.Address.secondary_address # "Apt. 752"
FakerElixir.Address.state # "New Jersey"
FakerElixir.Address.state_code # "TX"
FakerElixir.Address.street_address # "786 Willow Parkways"
FakerElixir.Address.street_name # "McLaughlin Mills"
FakerElixir.Address.street_suffix # "Lodge"
FakerElixir.Address.time_zone # "Europe/Sarajevo"
FakerElixir.Address.zip_code # "59146-7626"

FakerElixir.App

FakerElixir.App.author # "Antonio Konopelski"
FakerElixir.App.name # "Chocolada"
FakerElixir.App.version # "8.1.7"

FakerElixir.Avatar

FakerElixir.Avatar.robohash # "https://robohash.org/fceuxke.png?size=300x300"
FakerElixir.Avatar.robohash("zombies-must-die") # "https://robohash.org/zombies-must-die.png?size=300x300"
FakerElixir.Avatar.robohash("zombies-forever", "400x400") # "https://robohash.org/zombies-forever.png?size=400x400"
FakerElixir.Avatar.robohash("i-love-a-zombie", "300x300", "jpg") # "https://robohash.org/i-love-a-zombie.jpg?size=300x300"
FakerElixir.Avatar.robohash("boring-slug", "230x230", "bmp", "set1") # "https://robohash.org/boring-slug.bmp?size=230x230&set=set1"
FakerElixir.Avatar.robohash("ahahahaha", "198x198", "jpg", "set2", "bg2") # "https://robohash.org/ahahahaha.jpg?size=198x198&set=set2&bgset=bg2"

FakerElixir.Bank

FakerElixir.Bank.credit_card_cvv # 914

# Context: 22 august 2016
FakerElixir.Bank.credit_card_expiration_date # "08/2017"
FakerElixir.Bank.credit_card_expiration_date(:valid) # "06/2023"
FakerElixir.Bank.credit_card_expiration_date(:invalid) # "12/2011"

FakerElixir.Bank.credit_card_number # "34521702751096"
FakerElixir.Bank.credit_card_type # "MasterCard"

FakerElixir.Bank.make_credit_card # %{cvv: "188", expiration_date: "12/2006", name: "LLEWELLYN WEBER", number: "601141761193874", type: "Discover Card"}

FakerElixir.Bank.name # "Goldman Sachs Group"

FakerElixir.Boolean

FakerElixir.Boolean.boolean # true

# Return a boolean with a ratio chance to be true
# 1 = always true / 0 = always false / 0.1 = 10% chance to be true
FakerElixir.Boolean.boolean(1) # true
FakerElixir.Boolean.boolean(0) # false
FakerElixir.Boolean.boolean(0.1) # false

FakerElixir.Color

FakerElixir.Color.hex # "#1671B0"

FakerElixir.Color.hsl # "hsl(130, 40%, 41%)"
FakerElixir.Color.make_hsl # [236, "13%", "77%"]

FakerElixir.Color.rgb # "rgb(152, 228, 47)"
FakerElixir.Color.make_rgb # [65, 137, 5]

FakerElixir.Color.name # "white"

FakerElixir.Commerce

FakerElixir.Commerce.coupon # "AmazingDeal35"
FakerElixir.Commerce.coupon(5) # "AmazingDeal20250"

FakerElixir.Commerce.product # "Sleek Frozen Table"
FakerElixir.Commerce.sku # "4OY026FR"

FakerElixir.Crypto

FakerElixir.Crypto.md5 # "9FE3CFD7113162785ED3D59C73166766"
FakerElixir.Crypto.sha1 # "7D6757DDD455FC6AA25C0D78C1CDE73B21028CD7"
FakerElixir.Crypto.sha224 # "824B34965B6A3E48BE71E09A54F63BC216845D794EB378E756EE759D"
FakerElixir.Crypto.sha256 # "4762E04FB860A8A7C4D58B495DE133355D069CF618A55BBACA98583DF105818C"
FakerElixir.Crypto.sha384 # "9C01EBA98F4A52F76948D48A0FB3C63C26DE451667F8957C6420B6D26183F93C28A3A344406C77FF74C877EE5AA3AD10"
FakerElixir.Crypto.sha512 # "06C1CC54DC49E53B1274D9A0DD951B76DD45731E0AB319D98575DEA1955F6A0B20D5B70548190119AED52A5254127A60511257673C332F759F9510B8F32AAC26"

FakerElixir.Currency

FakerElixir.Currency.code # "ZMK"
FakerElixir.Currency.make # %{code: "UAH", country: "Ukraine", name: "Ukrainian Hryvnia", symbol: "₴"}
FakerElixir.Currency.name # "East Caribbean Dollar"
FakerElixir.Currency.symbol # "€"

FakerElixir.Date

# Generate a random date time for yesterday
FakerElixir.Date.backward(1) # "2016-08-18 05:58:04Z"

# Generate a random date time between yesterday and the day before yesterday
FakerElixir.Date.backward(1..2) # "2016-08-17 03:48:32Z"

FakerElixir.Date.birthday # "1988-03-07 16:28:37Z"

FakerElixir.Date.forward(1) # "2016-08-20 19:29:28Z"
FakerElixir.Date.forward(1..2) # "2016-08-20 11:18:18Z"

FakerElixir.File

FakerElixir.File.extension # "png"

# Allowed: :image, :audio, :text, :video, :office
FakerElixir.File.extension(:audio) # "mp3"

FakerElixir.File.mime # "application/javascript"

# Allowed: :application, :audio, :image, :message, :model, :multipart, :text, :video
FakerElixir.File.mime(:message) # "message/rfc822"

FakerElixir.File.name # "aut.css"

# Allowed: :image, :audio, :text, :video, :office
FakerElixir.File.name(:video) # "mollitia.avi""

FakerElixir.Helper

# Check out the documentation for this helper:
# https://hexdocs.pm/faker_elixir_octopus/FakerElixir.Helper.html#cycle/2
FakerElixir.Helper.cycle(:zombies, ["Peter", "Audrey"]) # "Peter"
FakerElixir.Helper.cycle(:zombies, ["Peter", "Audrey"]) # "Audrey"
FakerElixir.Helper.cycle(:zombies, ["Peter", "Audrey"]) # "Peter"

FakerElixir.Helper.letterify("#.#.#.#") # "k.e.n.u"
FakerElixir.Helper.numerify("Apt. ###") # "Apt. 902"

FakerElixir.Helper.pick(["paris", "athens", "london"]) # "london"
FakerElixir.Helper.pick(0..100) # 51

# Check out the documentation for this helper:
# https://hexdocs.pm/faker_elixir_octopus/FakerElixir.Helper.html#unique!/2
FakerElixir.Helper.unique!(:emails, fn -> FakerElixir.Internet.email(:popular) end) # "gutkowski@hotmail.com"

FakerElixir.Internet

FakerElixir.Internet.email # "demarcus@ezra.io"
FakerElixir.Internet.email("Peter Moleski") # "peter.moleski@ethel.net"

FakerElixir.Internet.email(:popular) # "candelario@gmail.com"
FakerElixir.Internet.email(:popular, "Peter Sobieska") # "peter.sobieska@hotmail.com"

FakerElixir.Internet.email(:school) # "trycia@uab.edu"
FakerElixir.Internet.email(:school, "Harry Potter") "harry.potter@stanford.edu"

FakerElixir.Internet.password(:weak) # "robbie"
FakerElixir.Internet.password(:normal) # "francesco6"
FakerElixir.Internet.password(:strong) # "tOu%Mt*B16ueLs!0uA3rDA"

FakerElixir.Internet.url # "http://www.alejandra-connelly.com/"
FakerElixir.Internet.url(:safe) # "https://www.stefan-little.org/"

FakerElixir.Internet.user_name # "chadrick"
FakerElixir.Internet.user_name("Jeremie GES") # "jeremie.ges"

FakerElixir.Internet.user_agent # "Mozilla/5.0 (iPad; CPU OS 8_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B411 Safari/600.1.4"

# Allowed: :bot, :browser, :chrome, :desktop, :firefox, :console, :ie, :opera, :phone, :playstation, :safari, :tablet, :wii, :xbox
FakerElixir.Internet.user_agent(:safari) # "Mozilla/5.0 (iPad; CPU OS 8_1_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B436 Safari/600.1.4"

FakerElixir.Lorem

FakerElixir.Lorem.character # "c"

FakerElixir.Lorem.characters # "0ycp0x"
FakerElixir.Lorem.characters(2) # "rj"
FakerElixir.Lorem.characters(10..30) # "rhch0bceu38240vds"

FakerElixir.Lorem.sentence # "Qui maiores quaerat iusto quod in totam consequatur perspiciatis necessitatibus vitae."

FakerElixir.Lorem.sentences(2) # "Qui omnis distinctio optio quisquam non optio id sequi assumenda corrupti distinctio et et inventore libero mollitia et. Cum doloremque sapiente mollitia nulla harum pariatur natus voluptates maxime consequuntur sunt commodi blanditiis ut nam."
FakerElixir.Lorem.sentences(3..5) # "Culpa velit labore tenetur quia ipsum ullam dolore ut et commodi. Fuga quia dolore nihil non laudantium molestias nemo voluptas ea voluptatum aut aspernatur voluptatem. Repellendus illo dolorem incidunt quasi possimus quam quae alias recusandae unde aliquam optio rem velit sint eum. Quo aliquid itaque ratione eum blanditiis commodi explicabo perspiciatis nesciunt pariatur dolor eius voluptas."

FakerElixir.Lorem.word # "et"

FakerElixir.Lorem.words # "pariatur ea eos quibusdam velit debitis et"
FakerElixir.Lorem.words(3) # "sapiente optio dolor"
FakerElixir.Lorem.words(2..4) # "laudantium rem saepe qui"

FakerElixir.Name

FakerElixir.Name.first_name # "Ari"
FakerElixir.Name.last_name # "Miller"
FakerElixir.Name.name # "Louie Corkery"
FakerElixir.Name.name_with_middle # "Annalise Francesco Schowalter"
FakerElixir.Name.prefix # "Mr."
FakerElixir.Name.suffix # "PhD"
FakerElixir.Name.title # "Principal Branding Orchestrator"

FakerElixir.Number

FakerElixir.Number.between(15..150) # 130
FakerElixir.Number.between(15, 150) # 18
FakerElixir.Number.between(11.22, 13.88) # 11.24
FakerElixir.Number.between(12, 12.35) # 12.11

FakerElixir.Number.decimal # "70.8"

# 3 left digits
FakerElixir.Number.decimal(3) # "918.43"

# 1 left digit and 3 right digits
FakerElixir.Number.decimal(1, 3) # "2.298"

FakerElixir.Number.digit # 3
FakerElixir.Number.digits # 452

# 4 digits please!
FakerElixir.Number.digits(4) # 7025

FakerElixir.Phone

FakerElixir.Phone.cell # "1-714-443-8836"
FakerElixir.Phone.home # "355.369.3998 x19434"

Locales

General

The default locale used by FakerElixir is :en. Right now only 4 locales are available: :fr, :en, :es, :it.

If you set a different locale, FakerElixir will just fallback to :en (If you didn't provide a custom locale)

Note: Keep in mind you can set the locale at the runtime, the locale set will keep his state until you set another locale.

Basic example

FakerElixir.set_locale(:en) # :ok
FakerElixir.Address.city # "Baltimore"

FakerElixir.set_locale(:fr) # :ok
FakerElixir.Address.city # "Issy-les-Moulineaux"

FakerElixir.set_locale(:es) # :ok
FakerElixir.get_locale # :es

Phoenix Example

defmodule Zombie.AwesomeController do
  use Zombie.Web, :controller
  alias FakerElixir, as: Faker

  def index(conn, _params) do

    Faker.set_locale(:en)
    city_en = Faker.Address.city

    Faker.set_locale(:fr)
    city_fr = Faker.Address.city

    text conn, "#{city_en} / #{city_fr}"
  end
end

# Will produce something like: Charlotte / Courbevoie

Custom locale

Since this package is quite new we don't have enough locales out of the box. It could be possible you don't like the data provided too. That's why we let you the possibility to define / update the data !

Add a new locale

Let's say you are spanish and you want to create the :es locale, you just need to define a new module in your elixir / mix project:

# locales/faker_elixir/es.ex
# It doesn't matter where you define your module tho.

defmodule FakerElixir.LocalesCustom.Es do

  # Let's "localize" the cities
  @cities ["Barcelona", "Madrid", "La Jonquera"]

  def cities, do: cities

end

Now when you will set the locale :es, FakerElixir will pick your data:

defmodule Test do

  alias FakerElixir, as: Faker

  def try do
    Faker.set_locale(:es)
    Faker.Address.city # Barcelona
  end

end

Edit a locale

Let's say you want to update the locale :fr for the method FakerElixir.Address.secondary_address:

# locales/faker_elixir/fr.ex
# It doesn't matter where you define your module tho.

defmodule FakerElixir.LocalesCustom.Fr do

  @secondary_addresses ["Sonnette. ##"]

  def secondary_addresses, do: @secondary_addresses

end

Now when you will set the locale :fr, FakerElixir will pick your data:

defmodule Test do

  alias FakerElixir, as: Faker

  def try do
    Faker.set_locale(:fr)
    Faker.Address.secondary_address # Sonnette. 12
  end

end

Skeleton

The default skeleton for a locale is available here: Skeleton

Customisation

💬 "Hey dude, your package is "great" but you forgot that, that and ... that, whaddup ? 😎"

Well, depending the domain of your application, sure you will need some other fake data. That's why FakerElixir provides some useful things such as: FakerElixir.get_locale/0 and the FakerElixir.Helper module.

You could create your own module inside your application:

defmodule FakerElixir.Custom do

  @pokemons_en ["Charizard", "Bulbasaur", "Charmander"]
  @pokemons_fr ["Dracaufeu", "Bulbizarre", "Salameche"]

  def pokemon do
    locale = FakerElixir.get_locale

    case locale do
      :fr ->
        FakerElixir.Helper.pick(@pokemons_fr)

      _ ->
        FakerElixir.Helper.pick(@pokemons_en)
    end
  end

end