python 创建django环境以及结合react作为前端的基础demo
env configuration
on macos or linux , use conda to create a python env
conda create -n django python=3.12
conda activate django
# 查看python版本号是否OK
python --version
Python 3.12.12
# OKhow to select a python version
https://docs.djangoproject.com/zh-hans/5.2/faq/install/#faq-python-version-support
install django
pip install djangobase python files
mkdir -p ~/django
cd ~/django
# create a new project named sample
django-admin startproject sample
cd samplestart to run base admin
python ./manage.py runserver(django) ~/dev/django/sample $ python ./manage.py runserver
#Watching for file changes with StatReloader
#Performing system checks...
#System check identified no issues (0 silenced).
#You have 18 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
#Run 'python manage.py migrate' to apply them.
#November 02, 2025 - 10:08:12
#Django version 5.2.7, using settings 'sample.settings'
#Starting development server at http://127.0.0.1:8000/
#Quit the server with CONTROL-C.
#WARNING: This is a development server. Do not use it in a production setting. Use a production WSGI or ASGI server instead.
#For more information on production servers see: https://docs.djangoproject.com/en/5.2/howto/deployment/add a module such as category
python ./manage.py startapp category
# will create a folder named category and files lie views.py models.py etc.
cd category
ls
(django) ~/dev/django/sample/catalog $ ls
__init__.py admin.py migrations tests.py views.py
__pycache__ apps.py models.py urls.pyset url map (route)
create model (example from appsite)
from django.db import models
# Create your models here.
class CategoryModel(models.Model):
id = models.AutoField(primary_key=True, verbose_name="自增ID")
uid = models.CharField(max_length=8, unique=True, null=False, verbose_name="分类ID")
saasid = models.ForeignKey( to='saas.SaaSModel', to_field='uid', db_column='uid', on_delete=models.CASCADE, null=True, verbose_name="租户ID" )
alias = models.CharField(max_length=24, unique=True, null=True, verbose_name="别称")
title = models.CharField(max_length=64, null=False, verbose_name="分类名")
authorid = models.CharField(max_length=8, null=True, db_index=True, verbose_name="创建人ID")
parentid = models.CharField(max_length=8, null=True, db_index=True, verbose_name="上一级ID")
type = models.CharField(max_length=32, null=True, verbose_name="类型")
description = models.CharField(max_length=256, null=True, verbose_name="描述")
cover = models.CharField(max_length=256, null=True, verbose_name="封面")
status = models.CharField(max_length=12, null=False, default='enabled', verbose_name="状态 ")
createtime = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
lasttime = models.DateTimeField(auto_now=True, verbose_name="最后修改时间")
featured = models.BooleanField(null=False, default=False, db_index=True, verbose_name="置顶")
sort = models.IntegerField(null=False, default=0, db_index=True, verbose_name="优先排序")
class Meta:
db_table = "item_category"
verbose_name = "通用分类"
verbose_name_plural = "通用分类"
def __str__(self):
return self.title
@classmethod
def list_child(cls, uid, page=1, size=50, sort=None, more_filters=None):
filters = more_filters if more_filters is not None else {}
filters['parentid'] = uid
query = cls.objects.filter(**filters)
if sort:
query = query.order_by(sort)
start = (page - 1) * size
end = start + size
return query[start:end]
@classmethod
def count_child(cls, uid, more_filters=None):
filters = more_filters if more_filters is not None else {}
filters['parentid'] = uid
return cls.objects.filter(**filters).count()
field types introduction
https://developer.mozilla.org/zh-CN/docs/Learn_web_development/Extensions/Server-side/Django/Models
references
MDN introduction / docs
django official docs
https://docs.djangoproject.com/zh-hans/5.2/faq/install/#faq-python-version-support
Conda env
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