The road to WeChat applet development (3) Application of Django framework learning template 2
view：｛"HTML变量名" : "views变量名"｝
HTML：｛｛变量名｝｝
HelloWorld/HelloWorld/views.py file code:
runoob.html in templates:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>中国矿业大学计算机信息安全专业</title>
</head>
<body>
<p>{
{ name }}</p>
</body>
</html>
Visit http://127.0.0.1:8000/runoob again, you can see the page
filter
template syntax:
{
{ 变量名 | 过滤器：可选参数 }}
The template filter can modify the variable before it is displayed. The filter uses pipe characters, as shown below:
{
{ name|lower }}
After the {
{name }} variable is processed by the filter lower, the uppercase of the document is converted to lowercase.
The filter pipeline can be *socketed*, which means that the output of one filter pipeline can also be used as the input of the next pipeline:
{
{ my_list|first|upper }}
The above example takes the first element and converts it to uppercase.
Some filters have parameters. The filter parameters follow the colon and are always enclosed in double quotes. E.g:
{
{ bio|truncatewords:"30" }}
This will display the first 30 words of the variable bio.
Other filters:
addslashes : 添加反斜杠到任何反斜杠、单引号或者双引号前面。
date : 按指定的格式字符串参数格式化 date 或者 datetime 对象，实例：
{
{ pub_date|date:"F j, Y" }}
length : 返回变量的长度。
default
default provides a default value for the variable.
If the boolean value of the variable passed by views is false, the specified default value is used.
The following values are false:
0 0.0 False 0j "" [] () set() {} None
length
returns the length of the object for a list of strings and
the dictionary returns the number of key-value pairs, the length is set to return to the re
filesizeformat
display size of the file in a more readable manner (i.e. '13 KB ',' 4.1 MB', '102 bytes', etc.) The
dictionary returns the number of key-value pairs, and the collection returns the length after deduplication.
date
formats a date variable according to a given format.
The format Ymd H:i:s returns the time in the format of year-month-day hour:minute:second.
truncatechars
If the total number of characters in the string is more than the specified number of characters, the latter part will be truncated.
The truncated string will end with...