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<!doctype html>
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<html lang="en">
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<title>Entendendo DJANGO</title>
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<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
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<meta name="author" content="Hakim El Hattab">
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<link rel="stylesheet" href="reveal.js/css/reveal.css">
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<link rel="stylesheet" href="reveal.js/css/theme/solarized.css" id="theme">
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link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'reveal.js/css/print/paper.css';
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.semi-opaque {
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background-color: rgba(0, 0, 0, 0.7);
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}
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img {
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height: 400px;
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}
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</style>
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</head>
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<body>
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<div class="reveal">
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<div class="slides">
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<section data-backgroun='_images/django-allauth.png'>
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<p class='semi-opaque'>
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<h1>Django</h1>
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<h2>Uma Introdução</h2>
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</p>
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</section>
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<section>
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<section>
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<img src="_images/AYV1X0yv.png" alt="Me" style="float:left;">
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<div>
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<ul>
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<li>Júlio Biason</li>
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<li>CWI Software</li>
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<li>@juliobiason</li>
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<li>julio.biason@gmail.com</li>
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</ul>
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</div>
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</section>
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<section>
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<img src="_images/meetings.png" alt="Eu consigo detonar com reuniões" styl>
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</section>
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</section>
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<section>
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<section>
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<h2>Projeto</h2>
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<p>"Projeto" é como Django chama a base do sistema,
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que não passa de um conjunto de apps.</p>
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<p>Criado com <code>django-admin startproject [PROJECTNAME] .</code>.</p>
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</section>
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<section>
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<h2>Projeto: startproject</h2>
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<pre><code class="hljs" data-trim>
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project/
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├── manage.py
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└── project
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├── __init__.py
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├── settings.py
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├── urls.py
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└── wsgi.py
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</pre></code>
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<aside class="notes">
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startproject cria a estrutura do projeto.
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manage.py contem a estrutura de execução do projeto
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project contém a base do projeto.
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settings são as configuração do projeto.
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urls define a base das rotas.
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wsgi serve para a execução por wsgi.
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</aside>
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</section>
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<section>
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<h2>Time out: rodando o servidor de desenvolvimento</h2>
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<pre><code class="hljs" data-trim>
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$ python manage.py runserver
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Performing system checks...
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System check identified no issues (0 silenced).
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You have 13 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
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Run 'python manage.py migrate' to apply them.
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October 24, 2016 - 23:04:50
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Django version 1.10.2, using settings 'project.settings'
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Starting development server at http://127.0.0.1:8000/
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Quit the server with CONTROL-C.
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</code></pre>
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<aside class="notes">
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O que diabos aconteceu?
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primeiro, "runserver" carrega o servidor de desenvolvimento.
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qualquer alteração em arquivos irá recarregar o serviço.
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13 migrações não aplicadas; o django já vem com
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um conjunto de aplicações.
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</aside>
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</section>
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<section>
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<pre><code class="hljs" data-trim>
|
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$ python manage.py migrate
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|
|
Operations to perform:
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|
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Apply all migrations: admin, auth, contenttypes, sessions
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|
|
|
Running migrations:
|
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|
|
|
Applying contenttypes.0001_initial... OK
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|
Applying auth.0001_initial... OK
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Applying admin.0001_initial... OK
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Applying admin.0002_logentry_remove_auto_add... OK
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Applying contenttypes.0002_remove_content_type_name... OK
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Applying auth.0002_alter_permission_name_max_length... OK
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Applying auth.0003_alter_user_email_max_length... OK
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Applying auth.0004_alter_user_username_opts... OK
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Applying auth.0005_alter_user_last_login_null... OK
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Applying auth.0006_require_contenttypes_0002... OK
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Applying auth.0007_alter_validators_add_error_messages... OK
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Applying auth.0008_alter_user_username_max_length... OK
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Applying sessions.0001_initial... OK
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</code></pre>
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<aside class="notes">
|
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fazendo o migrate resolve tudo.
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</aside>
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</section>
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</section>
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<section>
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<section>
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<h2>App</h2>
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<p>
|
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|
|
App é como o Django chama as pequenas partes que
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compõem o sistema.
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</p>
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<p>
|
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|
Uma app pode ser entendida como uma tabela, ou um
|
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conjunto de tabelas que trabalham em conjunto ou
|
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conjunto de funções auxiliares.
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</p>
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</section>
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<section>
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<h2>App: startapp</h2>
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<pre><code class="hljs" data-trim>
|
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|
|
django-admin startapp customers
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</code></pre>
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</section>
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<section>
|
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|
|
<pre><code class="hljs">
|
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|
|
|
project/
|
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|
|
├── customers
|
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|
|
│ ├── admin.py
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|
│ ├── apps.py
|
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│ ├── __init__.py
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│ ├── migrations
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|
|
│ │ └── __init__.py
|
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|
│ ├── models.py
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│ ├── tests.py
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|
│ └── views.py
|
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|
|
├── db.sqlite3
|
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|
|
|
├── manage.py
|
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|
└── project
|
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|
|
|
|
├── __init__.py
|
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|
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├── __init__.pyc
|
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|
|
|
├── settings.py
|
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|
|
|
├── settings.pyc
|
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|
|
|
├── urls.py
|
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|
|
├── urls.pyc
|
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|
└── wsgi.py
|
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</code></pre>
|
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</section>
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<section>
|
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<h2>App: models.py</h2>
|
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|
|
|
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<pre><code class="hljs">
|
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|
|
|
from __future__ import unicode_literals
|
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|
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|
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|
|
from django.db import models
|
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class Customer(models.Model):
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name = models.CharField(max_length=100)
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def __str__(self):
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return self.name
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</code></pre>
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|
</section>
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|
<section>
|
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|
|
|
|
<pre><code class="hljs">
|
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|
|
|
|
$ python manage.py runserver
|
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|
|
|
Performing system checks...
|
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|
|
|
|
|
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|
System check identified no issues (0 silenced).
|
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|
|
|
October 25, 2016 - 21:01:40
|
|
|
|
|
|
Django version 1.10.2, using settings 'project.settings'
|
|
|
|
|
|
Starting development server at http://127.0.0.1:8000/
|
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|
|
|
|
Quit the server with CONTROL-C.
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|
|
</code></pre>
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|
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<aside class="notes">
|
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|
|
Cade os migrations?
|
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|
|
|
</aside>
|
|
|
|
|
|
</section>
|
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<section>
|
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|
|
|
|
<h2>App: Adicionando ao projeto</h2>
|
|
|
|
|
|
|
|
|
|
|
|
<pre><code class="hljs">
|
|
|
|
|
|
INSTALLED_APPS = [
|
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|
|
|
'django.contrib.admin',
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|
|
'django.contrib.auth',
|
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|
|
'django.contrib.contenttypes',
|
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|
|
'django.contrib.sessions',
|
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|
'django.contrib.messages',
|
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|
|
'django.contrib.staticfiles',
|
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'customers'
|
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]
|
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</code></pre>
|
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|
</section>
|
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|
<section>
|
|
|
|
|
|
<pre><code class="hljs">
|
|
|
|
|
|
$ python manage.py makemigrations
|
|
|
|
|
|
Migrations for 'customers':
|
|
|
|
|
|
customers/migrations/0001_initial.py:
|
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|
|
- Create model Customer
|
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|
|
</code></pre>
|
|
|
|
|
|
|
|
|
|
|
|
<pre><code class="hljs">
|
|
|
|
|
|
$ python manage.py migrate
|
|
|
|
|
|
Operations to perform:
|
|
|
|
|
|
Apply all migrations: admin, auth, contenttypes, customers, sessions
|
|
|
|
|
|
Running migrations:
|
|
|
|
|
|
Applying customers.0001_initial... OK
|
|
|
|
|
|
</code></pre>
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
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|
<section>
|
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|
|
|
|
<h2>App: Admin</h2>
|
|
|
|
|
|
|
|
|
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|
|
<pre><code class="hljs">
|
|
|
|
|
|
from django.contrib import admin
|
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|
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|
|
from customers.models import Customer
|
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|
|
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|
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class CustomerAdmin(admin.ModelAdmin):
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pass
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admin.site.register(Customer, CustomerAdmin)
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</code></pre>
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</section>
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</section>
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<section>
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<section>
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|
<h2>Outro App</h2>
|
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|
|
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|
<pre><code class="hljs">
|
|
|
|
|
|
from __future__ import unicode_literals
|
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|
|
|
|
|
|
|
|
|
|
from django.db import models
|
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|
from customers.models import Customer
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class Order(models.Model):
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customer = models.ForeignKey(Customer)
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date = models.DateField(auto_now_add=True)
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def __str__(self):
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return '{name} - {items} item'.format(
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name=self.customer.name,
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items=self.item_set.count())
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class Item(models.Model):
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order = models.ForeignKey(Order)
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item = models.CharField(max_length=30)
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qtd = models.PositiveIntegerField()
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|
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price = models.DecimalField(max_digits=8, decimal_places=2)
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|
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@property
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|
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def total(self):
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|
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return self.qtd * self.price
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</code></pre>
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|
</section>
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|
|
<section>
|
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|
|
<h2>Admin</h2>
|
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<pre><code class="hljs">
|
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|
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|
|
from django.contrib import admin
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from orders.models import Order
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from orders.models import Item
|
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|
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class Itemadmin(admin.TabularInline):
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model = Item
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|
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class OrderAdmin(admin.ModelAdmin):
|
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|
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inlines = [Itemadmin]
|
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|
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|
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|
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admin.site.register(Order, OrderAdmin)
|
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|
|
|
</code></pre>
|
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|
|
|
|
</section>
|
|
|
|
|
|
</section>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
<script src="reveal.js/lib/js/head.min.js"></script>
|
|
|
|
|
|
<script src="reveal.js/js/reveal.js"></script>
|
|
|
|
|
|
|
|
|
|
|
|
<script>
|
|
|
|
|
|
// Full list of configuration options available at:
|
|
|
|
|
|
// https://github.com/hakimel/reveal.js#configuration
|
|
|
|
|
|
Reveal.initialize({
|
|
|
|
|
|
controls: true,
|
|
|
|
|
|
progress: true,
|
|
|
|
|
|
history: true,
|
|
|
|
|
|
center: true,
|
|
|
|
|
|
|
|
|
|
|
|
transition: 'slide', // none/fade/slide/convex/concave/zoom
|
|
|
|
|
|
|
|
|
|
|
|
// Optional reveal.js plugins
|
|
|
|
|
|
dependencies: [
|
|
|
|
|
|
{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
|
|
|
|
|
|
{ src: 'plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
|
|
|
|
|
|
{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
|
|
|
|
|
|
{ src: 'reveal.js/plugin/highlight/highlight.js', async: true, callback: function() { hljs.configure({languages: ['python']}); hljs.initHighlightingOnLoad(); } },
|
|
|
|
|
|
{ src: 'reveal.js/plugin/zoom-js/zoom.js', async: true },
|
|
|
|
|
|
{ src: 'reveal.js/plugin/notes/notes.js', async: true }
|
|
|
|
|
|
]
|
|
|
|
|
|
});
|
|
|
|
|
|
</script>
|
|
|
|
|
|
</body>
|
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|
|
|
</html>
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