這次帶給大家使用Ajax和forms實現註冊用戶所需功能，使用Ajax和forms實現註冊用戶所需功能的注意事項有哪些，以下就是實戰案例，一起來看一下。
前端HTML
<!DOCTYPE html>
{% load static %}
{% get_static_prefix as getstatic %}
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta http-equiv="x-ua-compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" href="https://www.jd.com/favicon.ico">
<link href="{{ getstatic }}plugins/bootstrap-3.3.7/css/bootstrap.min.css" rel="stylesheet">
<title>注册页面</title>
<style>
.title-top {
padding: 0;
font-size: 21px;
margin-top: 40px;
}
.form-padding {
padding-right: 65px;
}
.has-feedback .country-code {
width: 53px;
text-align: right;
padding-right: 5px;
}
.mobile-control-wrap {
display: flex;
}
.mobile-num {
margin-left: 10px;
}
.form-horizontal .form-group {
margin-right: -15px;
margin-left: -15px;
}
.body-box {
margin-top: 70px;
height: 567px;
width: 68%;
}
.cnblogs-btn-blue {
color: white;
padding: 6px 14px;
letter-spacing: 1em;
padding-left: 2em;
background-color: RGB(70, 136, 214);
text-align: center;
}
.cnblogs-btn-blue :hover {
color: white;
}
.navbar {
background-color: RGB(40, 62, 92);
}
.side-img-box {
height: 300px;
position: relative;
padding-left: 0;
margin-top: 168px;
}
.side-img-box img {
position: relative;
width: 100%;
top: 50%;
transform: translateY(-50%);
border-radius: 8px;
}
.text-danger {
float: right;
}
.img-thumbnail {
width: 100px;
height: 100px;
margin-bottom: 20px;
margin-top: -10px;
}
#avatr_img {
margin-left: 237px;
}
</style>
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<p class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<p class="navbar-header">
<img src="{{ getstatic }}img/TIM截图20180205110238.png">
</p>
<!-- Collect the nav links, forms, and other content for toggling -->
<p class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li><a href="#">首页</a></li>
<li><a href="#">登录</a></li>
<li><a href="#">注册</a></li>
<li><a href="#">帮助</a></li>
</ul>
</p><!-- /.navbar-collapse -->
</p><!-- /.container-fluid -->
</nav>
<p class="container body-box" style="height: 567px;">
<p class="center-block body-content">
<!--头部提示-->
<p class="hidden-xs title-top col-sm-12">
注册新用户
<hr class="head-hr">
</p>
<p class="form-wrap">
<form class="form-horizontal col-sm-8 form-padding" role="form" id="registerForm" method="post"
novalidate="novalidate">
<!--每一行-->
<p id="avatr_img" class="form-group">
<label for="avatar">
<img id="avatar_img" class="img-thumbnail" src="{{ getstatic }}img/registersideimg.png" alt="用户头像">
头像
</label>
<input type="file" style="display: none;" id="avatar">
</p>
<p class="form-group">
<p class="col-sm-2 control-label">
<label class="w4-2" for="Email">邮 箱</label>
</p>
<p class="col-sm-10 has-feedback">
{{ register_form.email }}
<span class="text-danger"></span>
</p>
</p>
<p class="form-group">
<p class="col-sm-2 control-label">
<label class="w4-4" for="DisplayName">昵称</label>
</p>
<p class="col-sm-10 has-feedback">
{{ register_form.nik_name }}
<span class="text-danger field-validation-error"><span id="DisplayName-error"></span></span>
</p>
</p>
<p class="form-group">
<p class="col-sm-2 control-label">
<label class="w4-2" for="Password">密 码</label>
</p>
<p class="col-sm-10 has-feedback">
{{ register_form.password }}
<span class="text-danger field-validation-error"></span>
</p>
</p>
<p class="form-group">
<p class="col-sm-2 control-label">
<label class="w4-4" for="ConfirmPassword">确认密码</label>
</p>
<p class="col-sm-10 has-feedback">
{{ register_form.repeta_pwd }}
<span class="text-danger field-validation-error"><span id="mobile-error"></span></span>
</p>
</p>
<!--注册按钮-->
<p class="form-group">
<p class="col-sm-offset-2 col-sm-10">
<span class="col-sm-12 ajax-error"></span>
<input id="submitBtn" onclick="regesite()" type="button"
class="btn ladda-button center-block cnblogs-btn-blue" value="登录">
</p>
</p>
<!--协议提示-->
<p class="col-sm-offset-2 register-sign">
<span class="asterisk">*</span> “注册” 按钮，即表示您同意并愿意遵守 <a class="look-agreeon" target="_blank"
href="//passport.cnblogs.com/agreement.html">用户协议</a>。
</p>
<!--hidden-->
{% csrf_token %}
</form>
<p class="hidden-xs col-sm-4 side-img-box">
<p class="side-line">
<p></p>
</p>
<img src="{{ getstatic }}img/registersideimg.png">
</p>
</p>
</p>
</p>
<script src="{{ getstatic }}js/jquery-3.2.1.min.js"></script>
<script src="{{ getstatic }}plugins/bootstrap-3.3.7/js/bootstrap.min.js"></script>
</body>
</html>上面的程式碼只是HTML ，而JavaScript在下面實例中
<script>
$("#avatar").change(function () {
var chooice_file = $(this)[0].files[0];
var reader = new FileReader();// 注意这里，预览本地文件
reader.readAsDataURL(chooice_file);
reader.onload=function () {
$("#avatar_img").attr("src",this.result)
}
})
function regesite() {
var formdata = new FormData(); //z注意这里 涉及文件上传
formdata.append("email",$("#id_email").val());
formdata.append("nik_name",$("#id_nik_name").val());
formdata.append("password",$("#id_password").val());
formdata.append("repeta_pwd",$("#id_repeta_pwd").val());
formdata.append("valid_img",$("#avatar")[0].files[0]);
formdata.append("csrfmiddlewaretoken",$("[name='csrfmiddlewaretoken']").val());
$.ajax({
url: "{% url "regeste" %}",
type: "POST",
data:formdata,
contentType:false,
processData:false,
success: function (data) {
response_data = JSON.parse(data)
if(response_data.user){
location.href="{% url " rel="external nofollow" login" %}"
}else {
// 清空上次错误信息
$("form span").html("")
$(".has-feedback").removeClass("has-error")
$.each(response_data.error_msg,function (fiel, error_info) {
// 显示错误信息
$("#id_"+fiel).parent().addClass("has-error");
$("#id_"+fiel).next().html(error_info[0]);//显示全局错误 // 注意这里
if(fiel=="all"){
$("#id_repeta_pwd").next().html(error_info[0]).css("color","red")
}
})
}
}
})
}
</script>FileReader
FileReader主要用於將檔案內容讀入內存，透過一系列非同步接口，可以在主線程中存取本地文件。
使用FileReader對象，web應用程式可以非同步的讀取儲存在使用者電腦上的檔案(或原始資料緩衝)內容，可以使用File物件或Blob物件來指定所要處理的檔案或資料。
設計RegisterForm元件
from django import forms
from . import models
from django.forms import widgets
from django.core.exceptions import NON_FIELD_ERRORS, ValidationError
class RegisterForm(forms.Form):
nik_name = forms.CharField(max_length=32,
widget=widgets.TextInput(attrs={"class":"form-control"}),
error_messages={"required":"用户不能为空"})
email = forms.EmailField(widget=widgets.EmailInput(attrs={"class":"form-control"}),
error_messages={"required":"邮箱不能为空", "invalid":"邮箱格式错误"})
password = forms.CharField(min_length=5, widget=widgets.PasswordInput(attrs={"class":"form-control"}),
error_messages={"required": "密码不能为空",
"min_length":"最小长度5位",
}
)
repeta_pwd = forms.CharField(widget=widgets.PasswordInput(attrs={"class":"form-control"}),
error_messages={"required": "密码不能为空"})
def clean_nik_name(self):
name = self.cleaned_data.get("nik_name")
users = models.UserInfo.objects.filter(nik_name=name)
if not users:
return name
else:
raise ValidationError("用户已存在")
def clean(self): //全局钩子
pwd = self.cleaned_data.get("password")
repeta_pwd = self.cleaned_data.get("repeta_pwd")
if pwd and repeta_pwd:
if pwd == repeta_pwd:
return self.cleaned_data
else:
raise ValidationError("两次密码不一致")
else:
return self.cleaned_data伺服器##
def post(self,request):
reg_response = {"user": None,"error_msg":""}
register_form = RegisterForm(request.POST)
if register_form.is_valid():
email = request.POST.get("email")
nik_name = request.POST.get("nik_name")
password = request.POST.get("password")
repeta_pwd = request.POST.get("repeta_pwd")
valid = request.FILES.get("valid_img") #注意这里使用的request.FILES.get("")
if not valid:
valid = "avatardir/TIM图片20171209211626.gif"
check_user = models.UserInfo.objects.create_user(username=nik_name,nik_name=nik_name, email=email,
password=password,
avatar=valid
) # 注意这里保存导数据库中的是图片路径，并不是图片
reg_response = {"user": "user", "error_msg": ""}
return HttpResponse(json.dumps(reg_response))
else:
reg_response["error_msg"]=register_form.errors
return HttpResponse(json.dumps(reg_response))#Model中Userifor 的img
avatar = models.FileField(upload_to='avatar/', default="/avatar/default.gif", verbose_name="主键")
#注意：
upload_to ：預設把資料夾建立至根目錄下，如建立至指定位置，需要在setting中配置media。 如：希望使用者上傳的檔案單獨存儲，在setting中配置，MEDIA_ROOT= os.path.jion(BASE_DIR,"blog","media")
//此时，用户上传文件时，先创建并将文件保存至“putImg”文件夹中，“putImg”，然后将“putImg”放至对应的路径中。
# media 配置
url(r"^media/(?P<path>.*)",sever,{"document_root":setting.MEDIA_ROOT})注意： #
server ，是从django.views.static import server导入 from . import settings //url中的使用
相信看了本文案例你已經掌握了方法，更多精彩請關注php中文網其它相關文章！ 推薦閱讀：
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