如何使用 django 将表单数据从一个页面发送到另一个页面答案

【问题标题】：how to send form data from one page to another using django如何使用 django 将表单数据从一个页面发送到另一个页面
【发布时间】：2017-05-22 03:16:42
【问题描述】：

问题：我想将 index.html 的表单数据发送到 greetings.html，在 greetings.html 上显示用户名，但它显示错误消息

NoReverseMatch 在 / 未找到带有参数“()”和关键字参数“{}”的“greeting.views.greetings”的反向操作。尝试了 0 种模式：[] 请求方法：GET .你能推荐一个简单的使用 django 将表单数据发送到另一个页面的方法。
我想要一个显示列表中存在的选项的选择框。在表单内。

问候/模板/index.html

{% load static %}
<!DOCTYPE html>
<html>
<head>
  <title> </title>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link rel="stylesheet" type="text/css" href="{% static 'greetings/css/style.css' %}" />
    {% verbatim %}
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
      <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
      <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
    {% endverbatim %}
</head>
<body >
  <div class="container-fluid" >
    <div id="home" class="">
              <form class="input-form text-center" name = "form"  method = "POST"  action="{% url 'greetings.views.greetings'%}">
                  {% csrf_token %}
                <h1> Create your wishes </h1>
                  <input type="text" name = "username" placeholder="Enter your name"/>
                  <select name="select">
                      <option value=''>Please Choose your wish</option>
                  </select>
                  <br/>
                  <input id="btn" type="submit" name="submit" value="Create"/>
              </form>
    </div>
  </div>
</body>
</html>

greetings/template/greetings.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="demo-wish"class="card text-center">
              <h4> {{ username }} </h4>
           <h3> Wishes you </h3>
           <h4> Happy{{ username }} </h4>
          </div>
        <div id="demo" class="card text-center">
            <form>
                <h2>Create Your Wishes</h2>
                <h4>ENTER YOUR NAME TO WISH YOUR FRIENDS AND FAMILY MEMBERS</h4>
                <span>{{ username }}</span><br/>
                <input type="text" placeholder="Enter your name">
                <input type="submit" class="btn-primary"   value="Go">
            </form>
        </div>
      </div>
</body>
</html>

greetings/views.py

from django.shortcuts import render
from django.http import HttpResponse
from django.template import loader
from greetings.forms import LoginForm


def index(request):
    template = loader.get_template('greetings/index.html')
    return HttpResponse(template.render(request))

def greetings(request):
    if request.method == "POST":
        # Get the posted form
        MyLoginForm = LoginForm(request.POST)

        if MyLoginForm.is_valid():
            username = MyLoginForm.cleaned_data['username']
    else:
        MyLoginForm = LoginForm()

    return render(request, 'greetings/greetings.html', {"username": username})

greetings/urls.py

from django.conf.urls import url,include
from django.contrib import admin
from . import views

urlpatterns = [
    url(r'^$', views.index),
    url(r'^admin/', admin.site.urls),
]

project/urls.py

from django.conf.urls import url,include
from django.contrib import admin

urlpatterns = [
    url(r'^$', include('greetings.urls')),
    url(r'^admin/', admin.site.urls),
]

greetings/forms.py

from django import forms

class LoginForm(forms.Form):
   occasion=['christmas','New Year']
   user = forms.CharField(max_length = 100)
   select = forms.ChoiceField(widget=forms.Select(choices=occasion))

错误消息：

NoReverseMatch at /
Reverse for 'greeting.views.greetings' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: []
Request Method: GET
Request URL:    http://127.0.0.1:8000/
Django Version: 1.10.4
Exception Type: NoReverseMatch
Exception Value:    
Reverse for 'greeting.views.greetings' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: []
Exception Location: C:\Users\Captain America\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django-1.10.4-py3.6.egg\django\urls\resolvers.py in _reverse_with_prefix, line 392
Python Executable:  C:\Users\Captain America\AppData\Local\Programs\Python\Python36-32\python.exe
Python Version: 3.6.0
Python Path:    
['D:\\django\\project_greetings',
 'C:\\Users\\Captain '
 'America\\AppData\\Local\\Programs\\Python\\Python36-32\\python36.zip',
 'C:\\Users\\Captain '
 'America\\AppData\\Local\\Programs\\Python\\Python36-32\\DLLs',
 'C:\\Users\\Captain '
 'America\\AppData\\Local\\Programs\\Python\\Python36-32\\lib',
 'C:\\Users\\Captain America\\AppData\\Local\\Programs\\Python\\Python36-32',
 'C:\\Users\\Captain '
 'America\\AppData\\Local\\Programs\\Python\\Python36-32\\lib\\site-packages',
 'C:\\Users\\Captain '
 'America\\AppData\\Local\\Programs\\Python\\Python36-32\\lib\\site-packages\\django-1.10.4-py3.6.egg']
Server time:    Sat, 7 Jan 2017 17:58:39 +0530

【问题讨论】：

@e4c5 先生，我已经更正了这个问题。请帮我解决这个问题

标签： django forms django-forms django-views django-admin

【解决方案1】：

这是产生错误的以下行

<form class="input-form text-center" name = "form"  method = "POST"  action="{% url 'greetings.views.greetings'%}">

但是当您查看您的 urls.py 时，您并没有这样定义的视图。所以你需要先定义它。然后你需要assign it a name，如果你想获得带有url标签的链接

当您命名您的 URL 模式时，请确保您使用的名称是不太可能与任何其他应用程序选择的名称发生冲突。如果你调用您的 URL 模式注释，另一个应用程序执行相同操作事情，不能保证哪个 URL 会被插入到你的使用此名称时的模板。

事实上，我建议您阅读整页。在链接中。

【讨论】：

【解决方案2】：

假设您有两个 URL，url1 用于第 1 页，url2 用于您希望将表单数据发送到的第 2 页。

page1 的模板 #on click Button 我们将直接到 page2 即 url2

<form action="{% url 'url2' %}" method="post">
  {% csrf_token %}
    <button type="submit" name="var_name" value="var_value" class="class_name">Button</button>
</form>

page2 的views.py

if 'var_name' in request.POST:
    #context is the name of dict that we gonna pass to our template
    #'var_name' derives from the template of page1
    context["name"] = request.POST['var_name']
return render(request, 'page2.html', context)

page2 的模板 #因此我们最终可以从 page1 中获取我们存储在 'name' var 中的值

<p>{{name}}</p>

【讨论】：