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valar for morghulis

1. installation

  • you need to install valar in a django project
pip install valar

2. root app

  • you only need 3 files in your root app
    • settings.py
    • asgi.py
    • urls.py
    • __init__.py

settings.py

from pathlib import Path

""" Compulsory settings """
DEBUG = True
BASE_DIR = Path(__file__).resolve().parent.parent
BASE_APP = str(BASE_DIR.name)
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
SECRET_KEY = 'django-insecure-of@tfouoq^_f$l!yki#m=6j7)@&kjri$1_$!mca-=%7=+@f@5^'

""" Minimized compulsory settings """

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}

INSTALLED_APPS = [
    'django.contrib.sessions',
    "corsheaders",
    'channels',
    'valar.apps.ValarConfig',
]

MIDDLEWARE = [
    'django.contrib.sessions.middleware.SessionMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    'valar.system.middleware.ValarMiddleware'
]

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels.layers.InMemoryChannelLayer"
    }
}

CORS_ORIGIN_ALLOW_ALL = True
CORS_ALLOW_CREDENTIALS = True
ROOT_URLCONF = "%s.urls" % BASE_APP
ASGI_APPLICATION = "%s.asgi.application" % BASE_APP

""" Optional settings """

ALLOWED_HOSTS = ['*']
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'Asia/Shanghai'
USE_I18N = True
USE_TZ = False
SESSION_SAVE_EVERY_REQUEST = True
SESSION_COOKIE_AGE = 60 * 60
FILE_UPLOAD_MAX_MEMORY_SIZE = 1024 * 1024 * 100
DATA_UPLOAD_MAX_MEMORY_SIZE = 1024 * 1024 * 100

""" Valar Options """

VALAR_HANDLER_MAPPING = "%s.urls.channel_mapping" % BASE_APP
VALAR_MINIO_URL = "s3://admin:__password__@___host__:___port___"

""" Email Options """

EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'smtp.____.com'
EMAIL_PORT = 25
EMAIL_HOST_USER = "______@____.com"
EMAIL_HOST_PASSWORD = '______'

init.py (when using MySQL)

import pymysql

pymysql.install_as_MySQLdb()

asgi.py

import os
from pathlib import Path
from typing import cast, Callable, Any

from channels.routing import ProtocolTypeRouter, URLRouter
from django.core.asgi import get_asgi_application
from django.urls import re_path

from valar.system.socket.consumer import ValarConsumer

asgi_router_list = [
    re_path(
        r'(?P<client>\w+)/$',
        cast(Callable[..., Any], ValarConsumer.as_asgi())
    ),
]

os.environ.setdefault('DJANGO_SETTINGS_MODULE', '%s.settings' % Path(__file__).resolve().parent.parent.name)
application = ProtocolTypeRouter({
    'http': get_asgi_application(),
    'websocket': URLRouter(cast(Any, asgi_router_list))
})

urls.py

urlpatterns = [
]

channel_mapping = {
}
  • go to section 4 to see how to register channel handlers (a Vue - Django async communication tool) in urls.

3. migrate

  • no need to makemigrations and migrate for valar, valar will auto migration

4. how to register a channel handler for Morghulis async methods

4.1 create a handler


4.2 create a dict (e.g. using the name 'channel_mapping') to save your handler

  • I'd like to put it in the root urls.py, you can put it anywhere

4.3 register the channel_mapping in the settings.py


4.4 you can copy the following codes to your urls.py


5. create an orm model extends the AbstractUser class, enable the authentication of Valar

class User(AbstractUser):
    """
        any fields you want
    """
    description = models.TextField(null=True, verbose_name='备注')

    class Meta:
        verbose_name = 'User'

Metadata

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