from django import  forms
class UserInfo_form(forms.Form):name=forms.CharField(max_length=10,label='姓名')email = forms.CharField(max_length=20, label='邮箱')pwd=forms.CharField(max_length=20,label='密码')def register(request):if request.method=='GET':form=UserInfo_form()return render(request,'register.html',{'form':form})form=UserInfo_form(request.POST)             #这是实例化一个forms类的一个实例化对象res={'state':True,'error':{}}name=request.POST.get('name')email=request.POST.get('email')pwd=request.POST.get('pwd')r_pwd=request.POST.get('r_pwd')if not form.is_valid():                  #is_valid，这就是对实例化对象进行校验。然后form.errors里面放的是错误信息，form.clean_data放的是没问题的信息    res['error'] = form.errorsres['state'] = Falseif pwd != r_pwd :res['error']['r_pwd']=['密码不统一']if pwd==r_pwd and form.is_valid():User.objects.create_user(username=name,password=pwd,email=email)return JsonResponse(res)

Fieldrequired=True,               是否允许为空widget=None,                 HTML插件label=None,                  用于生成Label标签或显示内容initial=None,                初始值help_text='',                帮助信息(在标签旁边显示)error_messages=None,         错误信息 {'required': '不能为空', 'invalid': '格式错误'}show_hidden_initial=False,   是否在当前插件后面再加一个隐藏的且具有默认值的插件（可用于检验两次输入是否一直）validators=[],               自定义验证规则localize=False,              是否支持本地化disabled=False,              是否可以编辑label_suffix=None            Label内容后缀CharField(Field)max_length=None,             最大长度min_length=None,             最小长度strip=True                   是否移除用户输入空白IntegerField(Field)max_value=None,              最大值min_value=None,              最小值FloatField(IntegerField)...DecimalField(IntegerField)max_value=None,              最大值min_value=None,              最小值max_digits=None,             总长度decimal_places=None,         小数位长度BaseTemporalField(Field)input_formats=None          时间格式化  DateField(BaseTemporalField)    格式：2015-09-01
TimeField(BaseTemporalField)    格式：11:12
DateTimeField(BaseTemporalField)格式：2015-09-01 11:12DurationField(Field)            时间间隔：%d %H:%M:%S.%f...RegexField(CharField)regex,                      自定制正则表达式max_length=None,            最大长度min_length=None,            最小长度error_message=None,         忽略，错误信息使用 error_messages={'invalid': '...'}EmailField(CharField)     ...FileField(Field)allow_empty_file=False     是否允许空文件ImageField(FileField)     ...注：需要PIL模块，pip3 install Pillow以上两个字典使用时，需要注意两点：- form表单中 enctype="multipart/form-data"- view函数中 obj = MyForm(request.POST, request.FILES)URLField(Field)...BooleanField(Field) ...NullBooleanField(BooleanField)...ChoiceField(Field)...choices=(),                选项，如：choices = ((0,'上海'),(1,'北京'),)required=True,             是否必填widget=None,               插件，默认select插件label=None,                Label内容initial=None,              初始值help_text='',              帮助提示ModelChoiceField(ChoiceField)...                        django.forms.models.ModelChoiceFieldqueryset,                  # 查询数据库中的数据empty_label="---------",   # 默认空显示内容to_field_name=None,        # HTML中value的值对应的字段limit_choices_to=None      # ModelForm中对queryset二次筛选

ModelMultipleChoiceField(ModelChoiceField)...                        django.forms.models.ModelMultipleChoiceFieldTypedChoiceField(ChoiceField)coerce = lambda val: val   对选中的值进行一次转换empty_value= ''            空值的默认值MultipleChoiceField(ChoiceField)...TypedMultipleChoiceField(MultipleChoiceField)coerce = lambda val: val   对选中的每一个值进行一次转换empty_value= ''            空值的默认值ComboField(Field)fields=()                  使用多个验证，如下：即验证最大长度20，又验证邮箱格式fields.ComboField(fields=[fields.CharField(max_length=20), fields.EmailField(),])MultiValueField(Field)PS: 抽象类，子类中可以实现聚合多个字典去匹配一个值，要配合MultiWidget使用SplitDateTimeField(MultiValueField)input_date_formats=None,   格式列表：['%Y--%m--%d', '%m%d/%Y', '%m/%d/%y']input_time_formats=None    格式列表：['%H:%M:%S', '%H:%M:%S.%f', '%H:%M']FilePathField(ChoiceField)     文件选项，目录下文件显示在页面中path,                      文件夹路径match=None,                正则匹配recursive=False,           递归下面的文件夹allow_files=True,          允许文件allow_folders=False,       允许文件夹required=True,widget=None,label=None,initial=None,help_text=''GenericIPAddressFieldprotocol='both',           both,ipv4,ipv6支持的IP格式unpack_ipv4=False          解析ipv4地址，如果是::ffff:192.0.2.1时候，可解析为192.0.2.1， PS：protocol必须为both才能启用SlugField(CharField)           数字，字母，下划线，减号（连字符）...UUIDField(CharField)           uuid类型

# 单radio，值为字符串
# user = fields.CharField(
#     initial=2,
#     widget=widgets.RadioSelect(choices=((1,'上海'),(2,'北京'),))
# )# 单radio，值为字符串
# user = fields.ChoiceField(
#     choices=((1, '上海'), (2, '北京'),),
#     initial=2,
#     widget=widgets.RadioSelect
# )# 单select，值为字符串
# user = fields.CharField(
#     initial=2,
#     widget=widgets.Select(choices=((1,'上海'),(2,'北京'),))
# )# 单select，值为字符串
# user = fields.ChoiceField(
#     choices=((1, '上海'), (2, '北京'),),
#     initial=2,
#     widget=widgets.Select
# )# 多选select，值为列表
# user = fields.MultipleChoiceField(
#     choices=((1,'上海'),(2,'北京'),),    #这是写死的情况　　　 choices=Author.objects.all().value_list('pk','name')
#     initial=[1,],
#     widget=widgets.SelectMultiple
# )# 单checkbox
# user = fields.CharField(
#     widget=widgets.CheckboxInput()
# )# 多选checkbox,值为列表
# user = fields.MultipleChoiceField(
#     initial=[2, ],
#     choices=((1, '上海'), (2, '北京'),),
#     widget=widgets.CheckboxSelectMultiple

from django.forms import Form
from django.forms import widgets
from django.forms import fields
from django.core.validators import RegexValidatorclass MyForm(Form):user = fields.ChoiceField(# choices=((1, '上海'), (2, '北京'),),initial=2,widget=widgets.Select)def __init__(self, *args, **kwargs):super(MyForm,self).__init__(*args, **kwargs)# self.fields['user'].widget.choices = ((1, '上海'), (2, '北京'),)# 或self.fields['user'].widget.choices = models.Classes.objects.all().value_list('id','caption')

from django import forms
from django.forms import fields
from django.forms import widgets
from django.forms import models as form_model
from django.core.exceptions import ValidationError
from django.core.validators import RegexValidatorclass FInfo(forms.Form):authors = form_model.ModelMultipleChoiceField(queryset=models.NNewType.objects.all())# authors = form_model.ModelChoiceField(queryset=models.NNewType.objects.all())

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title><!-- 最新版本的 Bootstrap 核心 CSS 文件 --><link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>
<body>
<h3>注册页面</h3>
<div class="container"><div class="row"><div class="col-md-6 col-lg-offset-3"><form action="" method="post">{% csrf_token %}<div><label for="">用户名</label>{{ form.name }}</div><div><label for="">密码</label>{{ form.pwd }}</div><div><label for="">确认密码</label>{{ form.r_pwd }}</div><div><label for=""> 邮箱</label>{{ form.email }}</div><input type="submit" class="btn btn-default pull-right"></form></div></div>
</div></body>
</html>

<form action="" method="post">{% csrf_token %}{% for field in form %}<div><label for="">{{ field.label }}</label>{{ field }}</div>{% endfor %}<input type="submit" class="btn btn-default pull-right"></form>

<form action="" method="post">{% csrf_token %}{{ form.as_p }}<input type="submit" class="btn btn-default pull-right"></form>

def register(request):if request.method=='GET':form=UserInfo_form()return render(request,'register.html',{'form':form})form=UserInfo_form(request.POST)res={'state':True,'error':{}}name=request.POST.get('name')email=request.POST.get('email')pwd=request.POST.get('pwd')r_pwd=request.POST.get('r_pwd')if not form.is_valid():print(form)print(form.cleaned_data)print(form.errors)res['error'] = form.errorsres['state'] = Falseif pwd != r_pwd :res['error']['r_pwd']=['密码不统一']if pwd==r_pwd and form.is_valid():User.objects.create_user(username=name,password=pwd,email=email)return JsonResponse(res)

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title><link rel="stylesheet" href="/static/css/bootstrap.css"><script src="/static/jquery-3.3.1.js"></script><script src="/static/js/bootstrap.js"></script><style>.outer{margin-top: 200px;}.title{margin-bottom: 50px;}</style>
</head>
<body>
{% csrf_token %}
<div class="container outer">{% csrf_token %}<div class="row"><div class="col-md-6 col-md-offset-3"><div style="color: blue;font-size: 50px;text-align: center;font-family: 华文隶书" class="title">注册页面</div>{% for field in form %}<div class="form-group "><label for="id_{{ field.name }}">{{ field.label }}</label>{{ field }}<span class="right_span" style="color: red"></span></div>{% endfor %}<button class="register btn btn-info">注册</button></div></div>
</div><script>$('input').addClass('form-control');$('#id_pwd').attr('type','password').attr('placeholder','只能有数字、字母、下划线组成的，长度5到20');$('#id_r_pwd').attr('type','password');$('#id_name').attr('placeholder','长度在4到10，不能全为数字');$('#id_email').attr('placeholder','例764517831@qq.com');{#$('#id_pwd').attr('placeholder','只能有数字、字母、下划线组成的，长度5到20');#}$('.register').click(function () {$('span').html('');$.ajax({url:'',type:'post',data:{csrfmiddlewaretoken:$('[name="csrfmiddlewaretoken"]').val(),name:$('[name="name"]').val(),pwd:$('[name="pwd"]').val(),r_pwd:$('[name="r_pwd"]').val(),email:$('[name="email"]').val()},success:function (res) {state=res['state'];if (state){location.href='/login/'}else {$.each(res['error'],function(key,val) {console.log(key,val)$('#id_'+key).next().html(val[0])       #每个字段错误的信息都会放在一个列表里})}}})})</script>
</body>

class UserInfo_form(forms.Form):name=forms.CharField(max_length=10,label='姓名')email = forms.CharField(max_length=20, label='邮箱')pwd=forms.CharField(max_length=20,label='密码')r_pwd=forms.CharField(max_length=20,label='确认密码')　　下面的局部钩子，必须在上面的对应的过滤条件通过之后，才会走到对应的钩子，局部钩子只能对对应的字段进行操作def clean_name(self):                 #clean_字段名,固定写法val=self.cleaned_data.get('name')if val.isdigit():           #如果不符合要求，要抛错误raise ValidationError('不能全为数字')elif len(val)<4 or len(val)>10:raise ValidationError('长度只能在4到10之间')elif User.objects.filter(username=val):raise ValidationError('用户名已存在')else:                #如果正确的话，必须返回取进来的值，因为在进行钩子验证时，会把值给清空的。return valdef clean_email(self):val=self.cleaned_data.get('email')if re.search(r'^\w+@\w+.com$',val):return valelse:raise ValidationError('邮箱格式不对')def clean_pwd(self):val=self.cleaned_data.get('pwd')if re.search('^[0-9a-zA-Z_]{5,20}$',val):return valelif len(val)<5 or len(val)>20:raise ValidationError('长度只能在5到20之间')else:raise ValidationError('密码只能有数字、下划线、字母组成')def clean_r_pwd(self):val = self.cleaned_data.get('r_pwd')if re.search('^[0-9a-zA-Z_]{5,20}$', val):return valelif len(val) < 5 or len(val) > 20:raise ValidationError('长度只能在5到20之间')else:raise ValidationError('密码只能有数字、下划线、字母组成')

def clean(self):      #在这里能拿到所有字段的值。pwd=self.cleaned_data.get("pwd")r_pwd=self.cleaned_data.get("r_pwd")if pwd==r_pwd:return self.cleaned_dataelse:raise ValidationError('两次密码不一致!')

from django.forms import Form
from django.forms import widgets
from django.forms import fields
from django.core.validators import RegexValidatorclass MyForm(Form):user = fields.CharField(validators=[RegexValidator(r'^[0-9]+$', '请输入数字'), RegexValidator(r'^159[0-9]+$', '数字必须以159开头')],)

import re
from django.forms import Form
from django.forms import widgets
from django.forms import fields
from django.core.exceptions import ValidationError# 自定义验证规则
def mobile_validate(value):mobile_re = re.compile(r'^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$')if not mobile_re.match(value):raise ValidationError('手机号码格式错误')class PublishForm(Form):title = fields.CharField(max_length=20,min_length=5,error_messages={'required': '标题不能为空','min_length': '标题最少为5个字符','max_length': '标题最多为20个字符'},widget=widgets.TextInput(attrs={'class': "form-control",'placeholder': '标题5-20个字符'}))# 使用自定义验证规则phone = fields.CharField(validators=[mobile_validate, ],error_messages={'required': '手机不能为空'},widget=widgets.TextInput(attrs={'class': "form-control",'placeholder': u'手机号码'}))email = fields.EmailField(required=False,error_messages={'required': u'邮箱不能为空','invalid': u'邮箱格式错误'},widget=widgets.TextInput(attrs={'class': "form-control", 'placeholder': u'邮箱'}))

from django import formsfrom django.forms import fieldsfrom django.forms import widgetsfrom django.core.exceptions import ValidationErrorfrom django.core.validators import RegexValidatorclass FInfo(forms.Form):username = fields.CharField(max_length=5,validators=[RegexValidator(r'^[0-9]+$', 'Enter a valid extension.', 'invalid')], )email = fields.EmailField()def clean_username(self):"""Form中字段中定义的格式匹配完之后，执行此方法进行验证:return:"""value = self.cleaned_data['username']if "666" in value:raise ValidationError('666已经被玩烂了...', 'invalid')return value

from django.forms import Form
from django.forms import widgets
from django.forms import fieldsfrom django.core.validators import RegexValidator############## 自定义字段 ##############
class PhoneField(fields.MultiValueField):def __init__(self, *args, **kwargs):# Define one message for all fields.error_messages = {'incomplete': 'Enter a country calling code and a phone number.',}# Or define a different message for each field.f = (fields.CharField(error_messages={'incomplete': 'Enter a country calling code.'},validators=[RegexValidator(r'^[0-9]+$', 'Enter a valid country calling code.'),],),fields.CharField(error_messages={'incomplete': 'Enter a phone number.'},validators=[RegexValidator(r'^[0-9]+$', 'Enter a valid phone number.')],),fields.CharField(validators=[RegexValidator(r'^[0-9]+$', 'Enter a valid extension.')],required=False,),)super(PhoneField, self).__init__(error_messages=error_messages, fields=f, require_all_fields=False, *args,**kwargs)def compress(self, data_list):"""当用户验证都通过后，该值返回给用户:param data_list::return:"""return data_list############## 自定义插件 ##############
class SplitPhoneWidget(widgets.MultiWidget):def __init__(self):ws = (widgets.TextInput(),widgets.TextInput(),widgets.TextInput(),)super(SplitPhoneWidget, self).__init__(ws)def decompress(self, value):"""处理初始值，当初始值initial不是列表时，调用该方法:param value::return:"""if value:return value.split(',')return [None, None, None]