要求:
(对作业要求的"Student"稍作了变换,表单名称为"Index"。)获得后台 Index 数据,作展示,要求使用分页器,包含上一页、下一页、当前页/总页。
结果:
① preparation (创建用户、app、注册、链接总路由等)
// 创建超级用户 terminal
python manage.py createsuperuser
// 8000端口admin
superuser login
( Create new app, install: )
terminal //
python manage.py startapp page_app
setting //
install
total url //
path('page/', include('page_app.urls', namespace="page")),
② 编写Index table,编写用于展示的views、sub-urls等
models //
python
from django.db import models
class Index(models.Model):
name = models.CharField(max_length=32, verbose_name="statistical index")
category = models.CharField(max_length=32, verbose_name="application field")
preference = models.FloatField(verbose_name="subjective recommendation degree")
description = models.CharField(max_length=128, verbose_name="brief documentation", null=True)
def __str__(self):
return f"{self.name}_{self.category}"
class Meta:
verbose_name = "Index"
verbose_name_plural = verbose_name + 'es'
@classmethod
def get_list(cls, **kwargs):
filters = {}
return cls.objects.filter(**filters) # objects.all()
app admin 注册表单到admin主页,添加测试数据// //
python
from django.contrib import admin
from page_app.models import Index
models = [
Index,
]
admin.site.register(models)
views //
python
from django.shortcuts import render
from django.core.paginator import Paginator, InvalidPage
from djangoProject.settings import PAGE_SIZE
from page_app.models import Index
def list_index(request):
page_num = request.GET.get("page_num", default=1) # 页码 可以通过/?page=k传参,路由与视图函数不必维护param
indexes = Index.get_list() # <queryset>
paginator = Paginator(indexes, PAGE_SIZE)
try:
data = paginator.page(page_num)
except InvalidPage:
data = paginator.page(1)
return render(request, "staticindex.html", {"data": data, "paginator": paginator})
# 记得不要locals().减少缓存中的数据量。
setting //
设置分页大小
PAGE_SIZE = 3
templates //