How to customize tag and filter of jinja2 by django

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Django uses jinja2 templates by default.

Jinja2 templates come with all kinds of filter and tag, and can also be customized.

Main format

{{variable}}

{{variable | filter:arg}}

{% tag%}

The official website http://jinja.pocoo.org/docs/2.10/

The customization process is as follows: 1. Create the fixed package name templatetags under the app directory, and create the py file

2. Mytags.py#/usr/bin/env python3from django import templateregister=template.Library () @ register.filter () def myfilter_name1 (XMagney): return x+y@register.filter () def myfilter_name2 (x): return x*x@register.simple_tag () def mytag_name1 (xMagy): return xonomy

Decorate filter with @ register.filter ()

Decorate tag with @ register.simple_tag ()

Note that service loading needs to be restarted

3. Html file {% load mytags%} Title case filterori: {{n}} {{n | myfilter_name1:5}} {{n | myfilter_name2}} case simple tag {% mytag_name1 3 5%}

The first line {% load mytags%}, that is, the file name of load py, can be used directly by tag

Filter format {{variable | filter: parameter}}

Simpletag format {% tag parameter%}

Functionally, some of the same operations can be achieved.

Some scenarios filter is better to use, such as {% if n | filter > 10%}

4. Page

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