一个py文件也能构建Django应用

DeanWu 2020-11-16 12:52:32
django 文件 构建 一个 py


今天在使用vue框架开发系统的时候,需要用到后端接口,但是接口还没有开发。便想使用最简单的方式构建一个极简的API服务,由于本人偏爱Django框架,便想能不能用Django框架简单的构建想Flask那样的单文件web服务。果然,被我找到了,摘录分享给大家。

# app.py
import os
import sys
from dataclasses import dataclass
from django.conf import settings
from django.core.wsgi import get_wsgi_application
from django.http import HttpResponseRedirect, JsonResponse
from django.urls import path
from django.utils.crypto import get_random_string
# django 的配置文件,相当于 settings.py 配置文件,可直接在这里添加和删除
# 下边已经是最简的Django 启动需要的参数了
settings.configure(
DEBUG=(os.environ.get("DEBUG", "") == "1"),
ALLOWED_HOSTS=["*"], # Disable host header validation
ROOT_URLCONF=__name__, # Make this module the urlconf
SECRET_KEY=get_random_string(
50
), # We aren't using any security features but Django requires this setting
MIDDLEWARE=["django.middleware.common.CommonMiddleware"],
)
# 使用dataclass 装饰器模拟了 model。
@dataclass
class Character:
name: str
age: int
def as_dict(self, id_):
return {
"id": id_,
"name": self.name,
"age": self.age,
}
# 列举数据,完全可以直接使用字段来构造需要返回的数据
characters = {
1: Character("Rick Sanchez", 70),
2: Character("Morty Smith", 14),
}
# Django View 部分,为方便简单直接使用 function base view
def index(request):
return HttpResponseRedirect("/characters/")
def characters_list(request):
return JsonResponse(
{"data": [character.as_dict(id_) for id_, character in characters.items()]}
)
def characters_detail(request, character_id):
try:
character = characters[character_id]
except KeyError:
return JsonResponse(
status=404,
data={"error": f"Character with id {character_id!r} does not exist."},
)
return JsonResponse({"data": character.as_dict(character_id)})
# Django route 部分,同 url.py
urlpatterns = [
path("", index),
path("characters/", characters_list),
path("characters/<int:character_id>/", characters_detail),
]
# 构建 uwsgi 使用 application 可使用 uwsgi 等 WSGI 协议的软件启动。
app = get_wsgi_application()
if __name__ == "__main__":
# 引入命令行启动方式函数,方便直接启动测试, 同 manage.py 文件
from django.core.management import execute_from_command_line
execute_from_command_line(sys.argv)

直接运行如下命令即可启动服务:

python app.py runserver

还可以使用 uwsgi 等应用程序启动。如使用 gunicorn 如下:

gunicorn app:app

希望可以帮助到你~

更多的Django 单文件的测试及构建方法可以到Adam Johnson(Django 技术委员会成员,英国Django MeetUp的组织者)的博客查阅。

版权声明
本文为[DeanWu]所创,转载请带上原文链接,感谢
https://segmentfault.com/a/1190000038182101

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