liminspace/django-mjml

django-mjml

The simplest way to use MJML in Django templates.

Installation

Requirements:

• Django from 2.2 to 4.2
• requests from 2.24.0 (only if you are going to use API HTTP-server for rendering)
• mjml from 3.6.3 to 4.14.0

1. Install mjml.

Follow https://github.com/mjmlio/mjml#installation and https://documentation.mjml.io/#installation to get more info.

2. Install django-mjml.

$ pip install django-mjml

If you want to use API HTTP-server you also need requests (at least version 2.24):

$ pip install django-mjml[requests]

To install development version use git+https://github.com/liminspace/django-mjml.git@main instead django-mjml.

3. Set up settings.py in your django project.

INSTALLED_APPS = (
  ...,
  'mjml',
)

Usage

Load mjml in your django template and use mjml tag that will compile MJML to HTML:

{% load mjml %}

{% mjml %}
    <mjml>
        <mj-body>
            <mj-section>
                <mj-column>
                    <mj-text>Hello world!</mj-text>
                </mj-column>
            </mj-section>
        </mj-body>
    </mjml>
{% endmjml %}

Advanced settings

There are three backend modes for compiling: cmd, tcpserver and httpserver.

cmd mode

This mode is very simple, slow and used by default.

Configure your Django:

MJML_BACKEND_MODE = 'cmd'
MJML_EXEC_CMD = 'mjml'

You can change MJML_EXEC_CMD and set path to executable mjml file, for example:

MJML_EXEC_CMD = '/home/user/node_modules/.bin/mjml'

Also you can pass addition cmd arguments, for example:

MJML_EXEC_CMD = ['node_modules/.bin/mjml', '--config.minify', 'true', '--config.validationLevel', 'strict']

Once you have a working installation, you can skip the sanity check on startup to speed things up:

MJML_CHECK_CMD_ON_STARTUP = False

tcpserver mode

This mode is faster than cmd but it needs the MJML TCP-Server.

Configure your Django:

MJML_BACKEND_MODE = 'tcpserver'
MJML_TCPSERVERS = [
    ('127.0.0.1', 28101),  # the host and port of MJML TCP-Server
]

You can set several servers and a random one will be used:

MJML_TCPSERVERS = [
    ('127.0.0.1', 28101),
    ('127.0.0.1', 28102),
    ('127.0.0.1', 28103),
]

httpserver mode

don't forget to install requests to use this mode.

This mode is faster than cmd and a bit slower than tcpserver, but you can use official MJML API https://mjml.io/api or run your own HTTP-server (for example https://github.com/danihodovic/mjml-server) to render templates.

Configure your Django:

MJML_BACKEND_MODE = 'httpserver'
MJML_HTTPSERVERS = [
    {
        'URL': 'https://api.mjml.io/v1/render',  # official MJML API
        'HTTP_AUTH': ('<Application ID>', '<Secret Key>'),
    },
    {
        'URL': 'http://127.0.0.1:38101/v1/render',  # your own HTTP-server
    },
]

You can set one or more servers and a random one will be used.