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<title>Entendendo DJANGO</title> |
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<meta name="author" content="Hakim El Hattab"> |
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img { |
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height: 400px; |
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} |
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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-background='_images/django-allauth.png' data-header> |
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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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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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├── __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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<pre><code class="hljs"> |
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from __future__ import unicode_literals |
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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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System check identified no issues (0 silenced). |
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October 25, 2016 - 21:01:40 |
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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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Cade os migrations? |
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</aside> |
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</section> |
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<section> |
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<h2>App: Adicionando ao projeto</h2> |
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<pre><code class="hljs"> |
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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> |
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<pre><code class="hljs"> |
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$ python manage.py makemigrations |
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Migrations for 'customers': |
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customers/migrations/0001_initial.py: |
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- Create model Customer |
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</code></pre> |
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<pre><code class="hljs"> |
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$ python manage.py migrate |
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Operations to perform: |
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Apply all migrations: admin, auth, contenttypes, customers, sessions |
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Running migrations: |
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Applying customers.0001_initial... OK |
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</code></pre> |
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</section> |
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<section> |
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<h2>App: Admin</h2> |
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<pre><code class="hljs"> |
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from django.contrib import admin |
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from customers.models import Customer |
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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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<pre><code class="hljs"> |
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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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price = models.DecimalField(max_digits=8, decimal_places=2) |
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@property |
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def total(self): |
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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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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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class Itemadmin(admin.TabularInline): |
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model = Item |
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class OrderAdmin(admin.ModelAdmin): |
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inlines = [Itemadmin] |
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admin.site.register(Order, OrderAdmin) |
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</code></pre> |
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</section> |
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</section> |
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