Django3 创建项目/app全流程=7

一、创建项目目录

1.1 预备环境

需要有python, django, 而且版本要匹配。

1.2、创建项目总文件夹

django-admin startproject <project_name>

1.3 创建app目录

进入到项目录，然后执行命令

python manage.py startapp <app_name>

二、创建项目文件

2.1 编写models模型代码

这里我们定义两个字段：name和age

from django.db import models

class showInfo(models.Model):
    name = models.CharField(max_length=20)
    addr = models.CharField(max_length=40)

    def __str__(self):
        return self.name

2.2 编写views视图代码

from django.views import generic

from .models import showInfo

class IndexView(generic.ListView):
    template_name = 'learn/index.html'
    context_object_name = 'showw'

    def get_queryset(self):
        return showInfo.objects.filter()

def add(request):
    name = request.POST['name']
    addr = request.POST['addr']
    showInfo.objects.create(name=name, addr=addr)
    return HttpResponseRedirect(reverse('learn:index'))

2.3 编写urls.py路由配置

from django.urls import path

from . import views

app_name = 'learn'
urlpatterns = [
    path('', views.IndexView.as_view(), name='index'),
    path('add/', views.add, name='add'),
]

2.5 编写admin.py将应用注册到管理台

from django.contrib import admin

from .models import showInfo

admin.site.register(showInfo)

2.6 编写learn/templates/learn/index.html视图模版

{% load static %}
<link rel="stylesheet" type="text/css" href="{% static 'learn/index.css' %}">

{% load static %}
<link rel="stylesheet" type="text/css" href="{% static 'learn/index.css' %}">

<h1>这里是learn.index</h1>

{% if showw %}
    <ul>
    {% for item in showw %}
        <li>{{ item.name }} {{ item.addr }}</li>
    {% endfor %}
    </ul>
{% else %}
    <p>没有结果</p>
{% endif %}

<form action="{% url 'learn:add' %}" method="POST">
    {% csrf_token %}
    <input type="text" name="name">
    <input type="text" name="addr">
    <button type="submit">add</button>
</form>

2.7 编写learn/static/learn/index.css样式表文件

h1 {
    color: greenyellow;
}

h1:hover {
    color: red;
}

2.8 在mysite的INSTALLED_APPS中将应用注册

INSTALLED_APPS = [
    'learn.apps.LearnConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

2.9 编写mysite/urls.py主路由配置

urlpatterns = [
    path('', include('learn.urls')),
    path('learn/', include('learn.urls')),
    path('admin/', admin.site.urls),
]

2.10 访问管理后台添加信息再访问主页

点击add后，会添加项：