目录
views/asset_data.py
asset_data/asset_data.html
搜索与分页笔记:
搜索
整数搜索
字符串搜索
分页
views/asset_data.py
# -*- coding:utf-8 -*-
from django.shortcuts import render, redirect, HttpResponse
from django.utils.safestring import mark_safe
from demo_one import models
from django import forms
import random
# 正则校验
from django.core.validators import RegexValidator
# 异常类
from django.core.exceptions import ValidationError
# 资产信息展示
def asset_data(request):
# 直接写入列表数据
data_time = ["2024-5-14", "2024-5-13", "2024-5-12", "2024-5-11", "2024-5-10", "2024-5-18"]
name_list = ["一灯大师", "马青雄", "马钰", "小沙弥", "木华黎", "丘处机", "沈青刚",
"书生", "天竺僧人", "王处一", "王罕", "尹志平", "包惜弱", "冯衡",
"孙不二", "札木合", "华筝", "李萍", "刘玄处", "刘瑛姑", "吕文德",
"乔寨主", "曲三", "曲傻姑", "全金发", "汤祖德", "朱聪", "陈玄风",
"灵智上人", "陆乘风", "陆冠英", "沙通天", "完颜洪烈", "完颜洪熙", "吴青烈",
"杨铁心", "余兆兴", "张阿生", "张十五", "忽都虎", "欧阳峰", "欧阳克",
"者勒米", "周伯通", "段天德", "郭靖", "郭啸天", "郝大通", "洪七公",
"姜文", "柯镇恶", "枯木", "南希仁", "胖妇人", "胖丐", "胖子",
"都史", "钱青健", "桑昆", "铁木真", "盖运聪", "黄蓉", "黄药师",
"梁子翁", "梅超风", "渔人", "博尔忽", "博尔术", "程瑶迦", "韩宝驹",
"焦木和尚", "鲁有脚", "穆念慈", "彭长老", "彭连虎", "童子", "窝阔台",
"简管家", "裘千仞", "裘千丈", "瘦丐", "察合台", "酸儒文人", "谭处端", ]
for name in name_list:
number = str(name_list.index(name) + 1)
if len(number) <= 1:
number = "2024" + "00" + number
# models.Asset.objects.create(name=name, mobile=f"153{random.randint(11111111, 99999999)}",
# data_time=random.choice(data_time), data_id=number)
elif len(number) <= 2:
number = "2024" + "0" + number
# models.Asset.objects.create(name=name, mobile=f"153{random.randint(11111111, 99999999)}",
# data_time=random.choice(data_time), data_id=number)
else:
number = "2024" + number
# models.Asset.objects.create(name=name, mobile=f"153{random.randint(11111111, 99999999)}",
# data_time=random.choice(data_time), data_id=number)
# data_list = models.Asset.objects.filter(data_id__contains="00")
# 搜索
dict_data = {}
# 获取搜索框当中的内容
value = request.GET.get("search")
# 如果value有值，则进行搜索，没有值，全部展示
if value:
# 字典的键是查询条件，值是查询的内容
dict_data["data_id__contains"] = value
# print(data_list)
# 分页
page = int(request.GET.get("page", 1)) # 当前所在的页面
page_size = 10 # 每页展示十条信息
# 寻找切片的开始和结束
start = (page-1) * page_size
end = page * page_size
# 字典当中如果有条件，则根据条件进行查询，如果是空，则查询全部,最终返回列表格式
data_list = models.Asset.objects.filter(**dict_data)[start:end]
# 查询总共有多少条数据
data_asset_count = models.Asset.objects.filter(**dict_data).count()
# 总数除以10，如果有余数，则单独添加一页
page_count, div = divmod(data_asset_count, page_size)
if div:
page_count += 1
# 见算出当前页的前两页和后两页
plus = 2
# 如果当前数据表的总页码小于 5页
if page_count <= 2*plus + 1:
start_page = 1
end_page = page_count
else:
# 当前选中的页数小于等于三
if page <= plus:
start_page = 1
end_page = 2 * plus + 1
else:
# 当前页 + 2
if(page + plus) > page_count:
start_page = page_count - plus * 2
end_page = page_count
else:
start_page = page - plus
end_page = page + plus
# 存放分页的li标签
page_str_list = []
# 首页
page_str_list.append(
f'<li><a href="?page=1" aria-label="Previous"><span aria-hidden="true">首页</span></a></li>')
# 上一页
if page > 1:
page_str_list.append(f'<li><a href="?page={page -1}" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')
else:
page_str_list.append(
f'<li class="disabled"><a href="#" aria-label="Previous"><span aria-hidden="true">«</span></a></li>')
for page_num in range(start_page, end_page+1):
if page_num == page:
page_ele = f'<li class="active"><a href="?page={page_num}">{page_num}</a></li>'
else:
page_ele = f'<li><a href="?page={page_num}">{page_num}</a></li>'
page_str_list.append(page_ele)
# 下一页
if page < page_count:
page_str_list.append(f'<li><a href="?page={page+1}" aria-label="Next"><span aria-hidden="true">»</span></a></li>')
else:
page_str_list.append(
f'<li class="disabled"><a href="#" aria-label="Next"><span aria-hidden="true">»</span></a></li>')
# 尾页
page_str_list.append(
f'<li><a href="?page={page_count}" aria-label="Previous"><span aria-hidden="true">尾页</span></a></li>')
# 将列表当中的字符串传递给html，并且一标签的形式展示
page_string = mark_safe("".join(page_str_list))
return render(request, "asset_data/asset_data.html", {
"data_list": data_list,
"page_string": page_string
})
# 添加资产
class Addasset(forms.ModelForm):
# 创建一个手机号输入框，校验手机号的格式
mobile = forms.CharField(
label="手机号",
validators=[RegexValidator(r"^1[3-9]\d{9}$", "请输入正确格式的手机号")]
)
class Meta:
model = models.Asset
fields = ["name", "mobile", "data_time", "data_id", "ret_data"]
# 排除某些字段
# exclude = ["name"]
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
for name, field in self.fields.items():
field.widget.attrs = {"class": "form-control", "autocomplete": "off"}
# 数据库做重复值判断 clean_字段(self)
def clean_data_id(self):
# 获取页面input框输入的资产编号
data_id_txt = self.cleaned_data["data_id"]
# 进入数据库，判断输入的资产编号是否存在
# .exists() filter条件满足，则返回True
exists = models.Asset.objects.filter(data_id=data_id_txt).exists()
if exists:
raise ValidationError("该资产已经被借用")
# 如果资产编号不在数据库，则返回编号
return data_id_txt
# 增加资产信息
def add_asset(request):
title = "添加资产"
if request.method == "GET":
form = Addasset()
return render(request, "asset_data/add_modify.html", {"title": title, "form": form})
form = Addasset(data=request.POST)
if form.is_valid():
form.save()
return redirect("/asset/data/")
return render(request, "asset_data/add_modify.html", {"title": title, "form": form})
class Modifyasset(forms.ModelForm):
data_time = forms.CharField(disabled=True, label="借用时间")
class Meta:
model = models.Asset
fields = "__all__"
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
for name, field in self.fields.items():
field.widget.attrs = {"class": "form-control", "autocomplete": "off"}
def clean_data_id(self):
# 获取页面input框输入的资产编号
data_id_txt = self.cleaned_data["data_id"]
# 进入数据库，判断输入的资产编号是否存在
# .exists() filter条件满足，则返回True
# exclude(id=self.instance.pk) 忽略当前字段，你某个值的验证
exists = models.Asset.objects.exclude(id=self.instance.pk).filter(data_id=data_id_txt).exists()
if exists:
raise ValidationError("该资产已经被借用,请重新修改")
# 如果资产编号不在数据库，则返回编号
return data_id_txt
# 修改信息
def modify_asset(request, nid):
title = "编辑资产信息"
data_obj = models.Asset.objects.filter(id=nid).first()
if request.method == "GET":
form = Modifyasset(instance=data_obj)
return render(request, "asset_data/add_modify.html", {"title": title, "form": form})
form = Modifyasset(data=request.POST, instance=data_obj)
if form.is_valid():
form.save()
return redirect("/asset/data/")
return render(request, "asset_data/add_modify.html", {"title": title, "form": form})
# 删除操作
def delete_asset(request, nid):
models.Asset.objects.filter(id=nid).delete()
return redirect("/asset/data/")
asset_data/asset_data.html
{% extends "index/index.html" %}
{% block content %}
<div class="container">
<div style="margin-bottom: 10px">
<a class="btn btn-success" href="/add/asset/"><span class="glyphicon glyphicon-plus" aria-hidden="true"></span>添加资产</a>
<div style="float: right;width: 300px">
<form method="get">
<div class="input-group">
<input type="text" class="form-control" placeholder="请输入资产编号" name="search">
<span class="input-group-btn">
<button class="btn btn-default" type="submit">Go!</button>
</span>
</div>
</form>
</div>
</div>
<div class="panel panel-warning">
<div class="panel-heading">
<h3 class="panel-title">资产表</h3>
</div>
<div class="panel-body">
<table class="table">
<thead>
<tr>
<th>id</th>
<th>姓名</th>
<th>电话</th>
<th>借用日期</th>
<th>资产编号</th>
<th>归还状态</th>
<th>操作</th>
</tr>
</thead>
<tbody>
{% for data in data_list %}
<tr>
<th>{{ data.id }}</th>
<td>{{ data.name }}</td>
<td>{{ data.mobile }}</td>
<td>{{ data.data_time }}</td>
<td>{{ data.data_id }}</td>
{% if data.ret_data == 1 %}
<td style="color: green">{{ data.get_ret_data_display }}</td>
{% else %}
<td style="color: red">{{ data.get_ret_data_display }}</td>
{% endif %}
<td>
<a href="/modify/{{ data.id}}/asset/"><span style="color: green" class="glyphicon glyphicon-pencil" aria-hidden="true"></span></a>
<a href="/delete/{{ data.id}}/asset/"><span style="color: red" class="glyphicon glyphicon-trash" aria-hidden="true"></span></a>
</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
</div>
<ul class="pagination">
{{ page_string }}
</ul>
</div>
{% endblock %}搜索与分页笔记:
搜索
models.Asset.objects.filter(name="Sakura",id=1)
-
整数搜索
# 搜索id为1的数据 models.Asset.objects.filter(id=1) # 搜索id大于1的数据 models.Asset.objects.filter(id__gt=1) # 搜索id大于等于1的数据 models.Asset.objects.filter(id__gte=1) # 搜索id小于1的数据 models.Asset.objects.filter(id__lt=1) # 搜索id小于等于1的数据 models.Asset.objects.filter(id__lte=1)
-
字符串搜索
# 包含在内 models.Asset.objects.filter(data_id__contains="2024") # 搜索开头 models.Asset.objects.filter(data_id__startswidth="2024") # 搜索结尾 models.Asset.objects.filter(data_id__endswidth="2024")
分页
1、每一页展示10条数据
models.Asset.objects.filter(**dict_data)[0~9] 第一页
models.Asset.objects.filter(**dict_data)[10~19] 第二页
models.Asset.objects.filter(**dict_data)[20~29] 第一页
2、计算数据表总共有多少条数据：
page = 500 / 10 (50页)
page = 501 / 10 (51页)
3、页面只展示五个li标签
如果在第一页， 则展示1,2,3,4,5
如果在第三页， 则展示1,2,3,4,5
如果在第四页， 则展示2,3,4,5,6
如果总页数小于5页
开始页 1
结束页 总页数
否则
如果当前选择的是第一页或者第二页
开始页=1
结束页=5
如果总共有20页
16，17，18，19，20
否则，在其他页面
比如点到了第九页
开始页 = page - plue
结束页 = page + plue
