Use Ajax and forms to implement the functions required to register users-JS Tutorial-php.cn

This time I will bring you the functions required for registered users using Ajax and forms. What are the precautions for using Ajax and forms to realize the functions required for registered users? Here are practical cases, let’s take a look.

Front-end 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>

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The above code is just HTML, and JavaScript is in the example below

<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>

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FileReader

FileReader is mainly used to read file contents into memory. Through a series of asynchronous interfaces, local files can be accessed in the main thread.

Using FileReader objects, web applications can asynchronously read the contents of files (or raw data buffers) stored on the user's computer. You can use File objects or Blob objects to specify the files or data to be processed.

Design RegisterForm component

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

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Server

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))

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Userifor's img

avatar = models.FileField(upload_to='avatar/', default="/avatar/default.gif", verbose_name="主键")

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Note:

upload_to: By default, the folder is created to In the root directory, if you create it to a specified location, you need to configure media in the setting.

For example: you want the files uploaded by the user to be stored separately and configured in the setting.

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})

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After configuring the above url, the user can access all files under the media folder

Note:

 server ，是从django.views.static import server导入
　　　  from . import settings //url中的使用

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I believe you have mastered the method after reading the case in this article, please pay attention for more exciting things Other related articles on php Chinese website!