后台:
from django.shortcuts import render
from django.shortcuts import redirect
from django.shortcuts import HttpResponse from django import forms
# 模版
class LoginForm(forms.Form):
# 模版中的元素
user = forms.CharField(min_length=6,error_messages={"required": '用户名不能为空','min_length': '用户名长度不能小6'})
email = forms.EmailField(error_messages={"required": '邮箱不能为空','invalid': '邮箱格式错误'}) class IndexForm(forms.Form):
# 模版中的元素
user = forms.CharField(min_length=6,error_messages={"required": '用户名不能为空','min_length': '用户名长度不能小6'})
email = forms.EmailField(error_messages={"required": '邮箱不能为空','invalid': '邮箱格式错误'})
favor = forms.MultipleChoiceField(
choices=[(1,'小虎'),(2,'小小虎'),(3,'小B虎')]
) import json
from datetime import date
from datetime import datetime def index(request):
obj = IndexForm()
return render(request,'index.html',{'obj': obj}) def edit_index(request):
obj = IndexForm({'user': 'root','email': 'root@live.com','favor': [2,3]})
return render(request,'index.html',{'obj': obj}) def login(request):
if request.method == "GET":
# 数据库中获取
obj = LoginForm()
return render(request,'login.html',{'oo': obj})
elif request.method == "POST":
"""
obj = LoginForm(request.POST)
# 验证
status = obj.is_valid()
print(status) value_dict = obj.clean()
print(value_dict) error_obj = obj.errors.as_json()
print(error_obj)
"""
obj = LoginForm(request.POST)
if obj.is_valid():
value_dict = obj.clean()
print(value_dict)
# create(**value_dict)
else:
# 封装了所有的错误信息
# print(obj.errors['email'][0])
# print(obj.errors["user"][0])
# print(type(error_obj))
from django.forms.utils import ErrorDict
pass return render(request, 'login.html',{'oo': obj}) def login_ajax(request):
if request.method == "GET":
return render(request, 'login_ajax.html')
elif request.method == "POST":
ret = {'status': True, 'error':None, 'data': None}
obj = LoginForm(request.POST)
if obj.is_valid():
print(obj.clean())
else:
# 方式一
# res_str = obj.errors.as_json() # res_str是一个字符串
# ret['status'] = False
# ret['error'] = res_str
# 两次反序列化
# 方式二：
ret['status'] = False
ret['error'] = obj.errors.as_data() # # {'user': [ValidationError(['用户名长度不能小6'])], 'email': [ValidationError(['邮箱格式错误'])]}
# # 一次反序列化
return HttpResponse(json.dumps(ret,cls=JsonCustomEncoder)) from django.core.validators import ValidationError
class JsonCustomEncoder(json.JSONEncoder):
def default(self, field):
if isinstance(field, ValidationError):
return {'code': field.code, 'message': field.message}
else:
return json.JSONEncoder.default(self, field)
"""
def login(request):
if request.method == "GET":
return render(request,'login.html')
elif request.method == "POST":
# 不爽
u = request.POST.get('user')
e = request.POST.get('email')
p = request.POST.get('pwd')
# 判断用户输入是否为空，提示用户那个错误
# ...
# 判断某种格式是否正确,提示用户那个错误
# ..
# 数据库校验：
# filter(user=u,email=e,pwd=p) # filter(**{})
# create(user=u,email=e,pwd=p) # create(**{})
# 只要上述条件有一个不满足， # 页面上一次提交的数据，无法保留（Form提交）
return render(request,'login.html', {})
# return redirect('/login.html')
"""
前端:
login:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>Form提交数据</h1>
<form method="POST" action="/login.html">
<p>
{{ oo.user }}
<span>{{ oo.errors.user.0 }}</span> </p>
<p>
{{ oo.email }}
<span>{{ oo.errors.email.0 }}</span>
</p>
<p>
<input type="text" name="pwd" placeholder="密码" />
</p>
<input type="submit" value="提交" /> {{ msg }}
<input id="ajax_submit" type="button" value="Ajax提交" />
</form>
<script src="/static/jquery-2.1.4.min.js"></script>
<script>
$(function () { $('#ajax_submit').click(function () {
$.ajax({
url:"/login.html",
data: {user:'root', email: 'root@live.com', pwd: '123123'},
type: 'POST',
success:function (arg) {
console.log(arg)
}
}) }) })
</script>
</body>
</html>
index:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<p>{{ obj.user }}</p>
<p>{{ obj.email }}</p>
<p>{{ obj.favor }}</p>
</body>
</html>
login_ajax:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.error-msg{
color: red;
font-size: 12px;
}
</style>
</head>
<body>
<h1>Form提交数据</h1>
<form id="f1">
<p>
<input id="u" type="text" name="user" placeholder="用户名" /> </p>
<p>
<input id="e" type="text" name="email" placeholder="邮箱" />
</p>
<p>
<input id="p" type="text" name="pwd" placeholder="密码" />
</p>
<input id="ajax_submit" type="button" value="Ajax提交" />
</form>
<script src="/static/jquery-2.1.4.min.js"></script>
<script>
$(function () {
$('#ajax_submit').click(function () {
$.ajax({
url:"/login_ajax.html",
//data: {user: $('#u').val(), email: $('#e').val(), pwd: $('#p').val()},
data: $('#f1').serialize(),
type: 'POST',
success:function (arg) { $('.error-msg').remove();
var v1 = JSON.parse(arg);
console.log(v1);
if(!v1.status){
// var error_obj = JSON.parse(v1.error);
var error_obj = v1.error;
$.each(error_obj,function (k,v) {
// k: user 或 email
// v: [{}{}{},]
var tag = document.createElement('span');
tag.className = 'error-msg';
tag.innerHTML = v[0].message;
$("input[name='" + k +"']").after(tag);
})
}else{
location.href = "/index.html"
}
// { 'stauts': true, 'error':xx, 'data'：’‘}
}
})
})
})
</script>
</body>
</html>