python-Web-django-钩子验证

全局钩子验证：

‘’’ 打包前端input，views数据处理，链接moduls数据库,用来验证 ’’’

Views:

Form=UserForm(request.POST)实例化对象

Form.cleaned_data #干净字段和值

Form.errors #dict---{‘效验错误字段’:’错误信息’}----form.errors.get(‘效验错误字段’)

form.errors.get(‘__all__’) #全局钩子错误信息

UserForm类定义：

From django import forms #自动验证

From django.forms import widgets

From django.core.exception import ValidationError

from django.core.validators import RegexValidator #正则

Wid_02 = widgets.PasswordInput(attrs={‘class’:’form-control’})#形成密码输入框

Pwd = forms.CharField(max_length=6,min_length=2,widget=wid_02,label=’密码’，validators=[RegexValidator(‘\d+’,’只能是数字’)]，error_messages={‘required’:’该字段必填’'min_length': '密码长度不能小于8','max_length': '密码长度不能大于18','invalid': '密码格式错误',})  #对输入框进行限制

#局部钩子---判断输入是否在数据库中

Def clean_member_name:

　　Val = self.cleaned_data.get(‘username’)

　　Res = Member.objects.filter(username=val)

　　If判断res:

　　　　Return val

　　Else:

　　　　Raise ValidationError(‘用户名已存在’)

#全局钩子（前端和前端）

Def xxx:

　　密码==重复密码

Html:

Form表单里：

1：

<lable for=’pwd’>{{form.username.lable}}</lable>   //标签名

<p>{{form.username}}<span class=’’pull-right error’’>{{form.username.errors.0}}</span></p>  

//输入框----错误信息

2：

<lable for=’pwd’>{{form.username.lable}}</lable>   //标签名

<p><input type=’password’ name=’pwd’ value={{ request.POST.pwd }}<span class=’’pull-right error’’>{{form.username.errors.0}}</span></p>

// request.POST.pwd ==  request.POST.get(‘pwd’)

3:

如果不想加error_message来显示中文信息，可以在setting里修改配置

LANGUAGE_CODE = ‘zh-hans’

这样错误信息自动转为中文

my_form:

from django import forms #自动验证
from django.forms import widgets
from django.core.exceptions import ValidationError
from app01.models import Member

class UserForm(forms.Form):
    ''''''
    wid_email = widgets.EmailInput(attrs={'class':'form - control'})
    wid_phone = widgets.TextInput(attrs={'class':'form - control'})
    wid_username = widgets.TextInput(attrs={'class':'form - control'})
    wid_displyname = widgets.TextInput(attrs={'class':'form - control'})
    wid_password = widgets.PasswordInput(attrs={'class':'form - control'})
    wid_rpassword = widgets.PasswordInput(attrs={'class':'form - control'})
    member_email = forms.EmailField(max_length=120, min_length=2, widget=wid_email, label='邮箱',error_messages = {'required':'该字段必填'})
    member_tel = forms.CharField(max_length=13, min_length=4, widget=wid_phone, label='手机号',error_messages = {'required':'该字段必填'})
    member_name = forms.CharField(max_length=30, min_length=2, widget=wid_username, label='用户名',error_messages = {'required':'该字段必填'})
    member_nickname = forms.CharField(max_length=20, min_length=2, widget=wid_displyname, label='昵称',error_messages = {'required':'该字段必填'})
    member_pwd = forms.CharField(max_length=30, min_length=8, widget=wid_password, label='密码',error_messages = {'required':'该字段必填'})
    r_pwd = forms.CharField(max_length=30, min_length=8, widget=wid_rpassword, label='重复密码',error_messages = {'required':'该字段必填'})

    def clean_member_name(self):
        ''''''
        val = self.cleaned_data.get('member_name')
        res = Member.objects.filter(member_name=val)
        print(res)
        if not res:
            return val
        else:
            return ValidationError('用户名已存在！')

    def clean(self):
        ''''''
        member_pwd = self.cleaned_data.get('member_pwd')
        r_pwd = self.cleaned_data.get('r_pwd')
        if member_pwd and r_pwd:
            if member_pwd == r_pwd:
                return self.cleaned_data
            else:
                return ValidationError('两次密码不一致!')
        else:
            return self.cleaned_data

views:

from django.shortcuts import render,HttpResponse,redirect
from app01.models import *
from app01.my_form import UserForm
import json

def enroll(request):
    ''''''
    res = {'s':None,'info':None}
    print(request.POST)
    if request.method == 'POST':
        form = UserForm(request.POST)
        print(form)
        print(form.errors)
        print(1)
        if not form.is_valid():
            res['s'] = 0
            res['info'] = form.errors
            print(2)
            return HttpResponse(json.dumps(res))
        email = request.POST.get('member_email')
        print(email)
        phone = request.POST.get('member_tel')
        username = request.POST.get('member_name')
        displyname = request.POST.get('member_nickname')
        password = request.POST.get('member_pwd')
        member_obj = Member.objects.create(member_email=email,member_tel=phone,member_name=username,member_nickname=displyname,member_pwd=password)
        print(3)
        if member_obj:
            res['s'] = 1
            res['info'] = '注册成功'
        else:
            res['s'] = 2
            res['info'] = '注册失败'
        response = HttpResponse(json.dumps(res))
        request.session['username'] = member_obj.member_name
        request.session['member_id'] = member_obj.id
        print(4)
        return response

    return render(request, 'app01_enroll.html', locals())