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Djangoでウェブアプリ - templateでif-then条件分岐

Last updated at Posted at 2018-09-06

Djangoを使ってウェブアプリを作ります
templateでif-thenの条件分岐をしてみます

  • このページで作成されたDjango環境はここからダウンロード可能です

#1. ファイルを用意します

  • penguinフォルダのurls.pyに以下を追加します
penguin/urls.py
from django.urls import path
from . import views

urlpatterns = [
    path('exercise', views.exercise, name='exercise'),
    path('', views.index, name='index'),
]
  • penguinフォルダのviews.pyに以下を記述します
penguin/views.py
from django.shortcuts import render

def index(request):
    return render(request, 'index.html')

def exercise(request):

    p = { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71 }

    return render(request, 'exercise.html', { 'prime': p } )
  • staticフォルダに下記のようなcssを用意します
test.css
.a1 {
  background-color:  #98d98e;
  height: 120px;
  padding: 20px;
}
.b1 {
  background-color:  #e4de8a;
  padding-left: 20px;
  height: 120px;
  text-align:left;
  padding: 20px;
  font-size: 18pt
}
  • penguinフォルダのtemplatesサブフォルダに下記のようなhtmlを用意します
penguin/templates/exercise.html
{% load static %}
<html>
<head>
</head>
<body>
  {% block extrahead %}
  <link href="{% static 'test.css' %}" rel="stylesheet">
  {% endblock %}

  <div class='a1'>
    <h1>テストページ</h1>
  </div>

  <div class='b1'>
    <p>
      <b>30以下の素数:</b><br>
      {% for p in prime %}
        {% if p <= 30 %}
          {{ p }}
        {% endif %}
      {% endfor %}
    </p>
  </div>

</body>
</html>

#2. 稼働を確認します

  • python manage.py runserverを実行し、Djangoを起動します
  • ブラウザでlocalhost:8000/exerciseへアクセスし、views.pyからのデータが表示されていることを確認します
スクリーンショット 2018-09-06 9.58.14.png
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