Django Form组件
1 验证
2 生成HTML(保留上次输入内容)
3 初始化默认值
FORM重点
-字段
ChoiceField 单选框
MultipleChoiceField 多选框
CharField
IntegerField
DecimalField 小数
DateField
DateTimeField
EmailField
GenericIPAddressField IP
RegexField 自定义正则
-HTML插件
通过attrs(class="jj") 给字段添加属性
自定义字段时的views文件
from django.shortcuts import render from django import forms from django.forms import fields from django.forms import widgets class TestForm(forms.Form): user = fields.CharField( required=False, max_length=12, min_length=3, error_messages={"required":'不能为空'}, ) age = fields.IntegerField() email = fields.EmailField() city =fields.ChoiceField( choices=[(1,"北京"),(2,"上海"),(3,"广州"),], #单选下拉框 initial=2 ) gender =fields.CharField( widget=widgets.Select(choices=[(1,"男"),(2,"女"),]), #单选下拉框 选男不选女 initial=2 ) hobby=fields.CharField( widget=widgets.RadioSelect(choices=[(1,"男"),(2,"女"),]), #单选radio initial = 2, ) province=fields.MultipleChoiceField( choices=[(1,'安徽'),(2,'江苏'),(3,'广东')], #d多选下拉框 initial=[1,2] ) cc=fields.CharField( widget=widgets.CheckboxInput(), #单选checkbox ) dd=fields.MultipleChoiceField( #多选 checkbox initial=[2,], choices=((1,'a'),(2,'b'),(3,"c")), widget=widgets.CheckboxSelectMultiple ) def test(request): if request.method == "GET": obj=TestForm() render(request,'test.html',{"obj":obj}) if request.method == 'POST': obj =TestForm(request.POST) return render(request,'test.html',{'obj':obj})
对应的HTML文件
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="" method="post" novalidate> {% csrf_token %} <p>{{ obj.user.label }} {{ obj.user }}</p> <p>{{ obj.age.label }} {{ obj.age }}</p> <p>{{ obj.email.label }} {{ obj.email }}</p> <p>{{ obj.city.label }} {{ obj.city }}</p> <p>{{ obj.gender.label }} {{ obj.gender }}</p> <p>{{ obj.hobby.label }} {{ obj.hobby.0 }}{{ obj.hobby.1 }}</p> <p>{{ obj.province.label }} {{ obj.province }}</p> <p>{{ obj.cc.label }} {{ obj.cc }}</p> <p>{{ obj.dd.label }} {{ obj.dd }}</p> <p>{{ obj.dd.label }} {% for row in obj.dd %} {{ row }}{{ '      ' }} {% endfor %} </p> <input type="submit" value="提交"> </form> </body> </html>
对应的效果
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用单选下拉框是，下拉框内的内容需要从数据库中取，
如果直接去，浏览器会将数据库的内容加载然后存到内存。后期数据库更新时，浏览器也不会更新的，所以需要添加__int__()属性
from app01 import models class LoveForm(forms.Form):
price = fields.IntegerField() user_id = fields.IntegerField( # widget=widgets.Select(choices=[(0,'alex'),(1,'杨建'),(2,'刘昊辰')]) widget = widgets.Select() ) def __init__(self,*args,**kwargs): #实时根据数据库更新，每次运行时，都会执行__int__（）,得到choices super(LoveForm, self).__init__(*args,**kwargs) self.fields['user_id'].widget.choices=models.UserInFo.objects.values_list('id','username') def love(request): obj=LoveForm() return render(request,'love.html',{'obj':obj})