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Django + MJML

django-mjml

The simplest way to use MJML in Django templates.


Installation

Requirements:

  • Django v1.8+
  • mjml v2.3+ (under node v8)

1. Install mjml.

See https://github.com/mjmlio/mjml#installation and https://mjml.io/documentation/#installation

2. Install django-mjml.

  • Via pip:

    $ pip install django-mjml
    
  • Via setuptools:

    $ easy_install django-mjml
    
For install development version use git+https://github.com/liminspace/django-mjml.git@develop 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-container>
        <mj-section>
            <mj-column>
                <mj-text>Hello world!</mj-text>
            </mj-column>
        </mj-section>
    </mj-container>
    </mj-body>
    </mjml>
{% endmjml %}

Advanced settings

There are two backend modes for compiling: cmd and tcpserver.

cmd mode

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

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 run a server process in background.

MJML_BACKEND_MODE = 'tcpserver'
MJML_TCPSERVERS = [
    ('127.0.0.1', 28101),  # host and port
]

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

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

You can run servers by commands:

# NODE_PATH=/home/user/node_modules node /home/user/.virtualenv/default/lib/python2.7/site-packages/mjml/node/tcpserver.js --port=28101 --host=127.0.0.1 --touchstop=/tmp/mjmltcpserver.stop

28101 - port, 127.0.0.1 - host, /tmp/mjmltcpserver.stop - file that will stop server after touch.

For daemonize server process you can use, for example, supervisor:

/etc/supervisor/conf.d/mjml.conf

[program:mjmltcpserver]
user=user
environment=NODE_PATH=/home/user/node_modules
command=node
    /home/user/.virtualenv/default/lib/python2.7/site-packages/mjml/node/tcpserver.js
    --port=28101 --host=127.0.0.1 --touchstop=/tmp/mjmltcpserver.stop --mjml.minify=true --mjml.validationLevel=strict
stdout_logfile=/home/user/project/var/log/supervisor/mjml.log
autostart=true
autorestart=true
redirect_stderr=true
stopwaitsecs=10
stopsignal=INT

Or you can use docker-compose:

services:
  mjml-1:
    image: liminspace/mjml-tcpserver:latest
    restart: always
    ports:
      - "28101:28101"

  mjml-2:
    image: liminspace/mjml-tcpserver:latest
    restart: always
    environment:
      HOST: "0.0.0.0"
      PORT: "28102"
      MJML_ARGS: "--mjml.minify=true --mjml.validationLevel=strict"
    expose:
      - "28102"
    ports:
      - "28102:28102"