django模板原理
# 創建template對象,由context對象傳遞template所需要的值, 有render方法進行模板的呈現
# 寫模板，創建 Template 對象，創建 Context ， 調用 render() 方法。
# Python 字符串都有 upper() 和 isdigit() 方法，你在模板中調用
# 執行變量
{{ abc }}
# 判斷
{% if x > 0 %}
{% else %}
{% endif %}
例:
{% if today_is_weekend %}
<p>Welcome to the weekend!</p>
{% endif %}
注意: 模板中不能包括 ()
{% if athlete_list or coach_list %}
There are some athletes or some coaches.
{% endif %}
# 循環
{% for i in items_list %}
例:
{% for athlete in athlete_list reversed %}
<li>{{ athlete.name }}</li>
{% empty %}
<p>There are no athletes. Only computer programmers.</p>
{% endfor %}
# forloop的一個用法
# forloop循環的結構控制語法
{% for link in links %}{{ link }}{% if not forloop.last %} | {% endif %}{% endfor %}
# forloop實現結構控制的變量 forloop.parentloop.counter 父計數器
# forloop.counter 當前計數器 接下來可以採用 if 進行邏輯控制
{% for country in countries %}
<table>
{% for city in country.city_list %}
<tr>
<td>Country #{{ forloop.parentloop.counter }}</td>
<td>City #{{ forloop.counter }}</td>
<td>{{ city }}</td>
</tr>
{% endfor %}
</table>
{% endfor %}
# 比較兩個變量的值
{% ifequal section 'sitenews' %}
<h1>Site News</h1>
{% else %}
<h1>No News Here</h1>
{% endifequal %}
#註釋及多行註釋
{# This is a comment #}
{% comment %}
This is a
multi-line comment.
{% endcomment %}
# 過濾器之後管道給lower ,,, truncatewords
{{ name | lower }}
{{ pub_date | date:"F j, Y" }}
# 模板加載
import os.path
TEMPLATE_DIRS = (
os.path.join(os.path.dirname(__file__), 'templates').replace('\\','/'),
)
from django.shortcuts import render_to_response
return render_to_response('current_datetime.html', {'current_date': now})
# 模板的繼承 base.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html lang="en">
<head>
<title>{% block title %}{% endblock %}</title>
</head>
<body>
<h1>My helpful timestamp site</h1>
{% block content %}{% endblock %}
{% block footer %}
<hr>
<p>Thanks for visiting my site.</p>
{% endblock %}
</body>
</html>
{% extends "base.html" %}
{% block title %}The current time{% endblock %}
{% block content %}
<p>It is now {{ current_date }}.</p>
{% endblock %}