Gain insights into building real-time web apps with Phoenix LiveView. Learn about creating interactive code, building a game from scratch, and managing distributed real-time dashboards.

Programming Phoenix LiveView by The Pragmatic Programmer_468 x 60 copy.png

liveview.tar.gz

Installation

LiveView_Sockets

Simple_App

Wrong_Guess_Number

Plug_Conn

Wrong_Guess_Number-auth

Wrong_Guess_Number-auth-gen

Wrong_Guess_Number-auth-gen-final

Generator

Generator-ecto

Generator-ected

Generator-web-ected

Forms-ected

Forms

Stateless

Stateless-ected

Stateful

Stateful-ected

Dashboard

Dashboard-ected

Distributed_Dashboard

Distributed_Dashboard-ected

Unit_Test

Unit_Test-ected

Core-ected

Core

phoenix_start_server

phoenix_build_only

phoenix_build_only_pento

phoenix_build_intro

test

intro_build_ected

intro_build_server

auth_build_server

auth_build_ected

generate_web_build_ected

generate_web_build_server

generator_build_server

generator_build_ected

forms_build_server

setup

forms_build_edcted

interactive_build_server

interactive_build_ected

distributed_build_server

distributed_build_ected

stateless_build_server

stateless_build_ected

stateful_build_server

stateful_build_ected

test_build_server

test_build_ected

core_build_server

core_build_ected

graphics_build_server

graphics_build_ected

test_build_terminal

test_build_GUI

test_build_server-copy

test_build_server-copy-copy

test_build_server-chrome-fix

test_build_server-docker_fix

intro-tester

If you want to program just for the joy of creating, LiveView will be an excellent opportunity for you. This programming model keeps your brain firmly on the server and lets you explore one concept at a time. Layering on graphics makes this kind of exploratory programming almost magical.

Programmers learn by writing code, and that’s exactly how this course will work. We’ll work on a project together as if we’re a fictional game company. You’ll write lots of code, starting with small tweaks of generated code and building up to major enhancements that extract common features with components.

As you build the application, you’ll encounter more complexity. A distributed dashboard will show a real-time view of other users and processes. You’ll even build a game from scratch—because that’s the best way to learn how to layer the most sophisticated LiveView applications.

Building Real-Time Web Applications with Phoenix LiveView

CRC core code is predictable (no side effects) so it allows specific test conditions

CRC functions are composable, so each one can be tested in isolation

CRC structure allows composition within tests

Mocks are easier because the core's side effects are explicit

Which one of these topics is _not_ a benefit of testing with CRC?

Which one of these topics is not a benefit of testing with CRC?

Fixtures set up data so the tests don't have to

Fixtures check actual values against expectations

Fixtures report test results to the end user

What is the purpose of a fixture?

A composable setup function used in tests

A standalone setup function used in tests

`assert_keys` probably relies on side effects in `assert`, and is probably a reducer returning an unchanged context

`assert_keys` is probably a converter that returns the result of an assertion

`assert_keys` is probably a constructor that builds the result of an assertion

In this example, without seeing `assert_keys`, how could `assert_keys` work both as a reducer and as an assertion?

```Elixir
...
socket
|> SurveyResultsLive.assign_age_group_filter()
|> assert_keys(:age_group_filter, "all")
|> update_socket(:age_group_filter, "18 and under")
|> SurveyResultsLive.assign_age_group_filter()
|> assert_keys(:age_group_filter, "18 and under")
```

In this example, without seeing <code>assert_keys</code>, how could <code>assert_keys</code> work both as a reducer and as an assertion?
<pre><code class="language-Elixir">...
socket
|&gt; SurveyResultsLive.assign_age_group_filter()
|&gt; assert_keys(:age_group_filter, &quot;all&quot;)
|&gt; update_socket(:age_group_filter, &quot;18 and under&quot;)
|&gt; SurveyResultsLive.assign_age_group_filter()
|&gt; assert_keys(:age_group_filter, &quot;18 and under&quot;)
</code></pre>

Introduction

Phoenix and Authentication

Generators: Contexts and Schemas

Generators: Live Views and Templates

Forms and Changesets

Stateless Components

Stateful Components

Build an Interactive Dashboard

Build a Distributed Dashboard

Test Your Live Views

Build The Game Core

Render Graphics With SVG

Conclusion

Quiz