自动重新加载页面而无需再次重新输入 URL Django

Question

我的网页由两部分组成，上半部分是让用户输入数据的部分，而下半部分以表格形式显示数据库中的所有数据。当用户选择上部的“添加”按钮时，数据将被保存到数据库中，并在网页底部的表格中输出。一旦我选择“添加”按钮，是否有显示表格？ Right now what the code is doing is when "Add" button is being selected, it will load a new form but then the whole table will disappear.我必须再次手动输入此地址“http://127.0.0.1:8000/hrfinance/lscholarship/”，然后才会出现表格。即使刷新页面也不起作用。以下是我在

中的代码

views.py：

def scholarship(request, id=None):
    query_results = []
    if request.method == "POST":
        form = ScholarshipForm(request.POST)
        if form.is_valid():
            scholarship = form.save(commit=False)
            scholarship.save()
    else:
        form = ScholarshipForm()
        id = request.GET.get('scholarship')
    query_results = Scholarship.objects.all()
    data = {
            'query_results':query_results,
            'form': form
           }
    return render(request, 'hrfinance/add_remove_scholarship.html', data)

models.py

class Application(models.Model):
    studentID = models.CharField("Student ID", max_length=8, validators=[MinLengthValidator(8)], primary_key=True, default="")
    studentName = models.CharField("Student Name", max_length=500, default="")
    scholarship = models.TextField("Scholarship")

add_remove_scholarship.html

<div align="center" >
<form method="POST" onsubmit="return validation()" action="">
{% csrf_token %}
{{ form.errors }}
    <p>Upload File: {{ form.doc }}</p>
    <p>Faculty: {{ form.faculty }} </p>
    <p>Opening date: <input id="odate" type="date" name="openDate"> </p>
    <p>Closing date: {{ form.closeDate }} </p>
    <input type="submit" name="AddScholarship" value="Add Scholarship"   >
</form>
</div>
<br></br>
    <button id="button" type="button">Delete Selected Scholarship</button>
    <br></br>
    {{query_results}}
    <form method="POST" action="">
    {% csrf_token %}
<table  id="example" class="display" cellspacing="0" width="100%" border="1.5px">
    <tr align="center">
        <th> Scholarship </th>
        <th> Faculty </th>
        <th> Open Date </th>
        <th> Close Date </th>
    </tr>
    {% for item in query_results %}
    <tr align="center">
        <td>{{item.doc}}</td>
        <td>{{item.faculty}}</td>
        <td>{{item.openDate}}</td>
        <td>{{item.closeDate}}</td>
    </tr>
    {% endfor %}
    </table>
    </form>

Answer 1

最佳做法是使用Post/Redirect/Get 模式。这也将解决您的问题：GET 请求将清除表单并显示新的查询结果。

如果表单保存成功，您只需返回一个重定向到当前页面。然后浏览器将执行 GET 请求。这可以防止意外的重复表单提交，例如当仍然是 POST 请求时，用户重新加载当前页面：

from django.shortcuts import redirect

def scholarship(request, id=None):
    query_results = []
    if request.method == "POST":
        form = ScholarshipForm(request.POST)
        if form.is_valid():
            scholarship = form.save(commit=False)
            scholarship.save()
            # Return a redirect to the same page
            return redirect('/path/to/current/page/')
    ...

Answer 2

def scholarship(request, id=None):
    query_results = []
    if request.method == "POST":
        form = ScholarshipForm(request.POST)
        if form.is_valid():
            scholarship = form.save(commit=False)
            scholarship.save()

    else:
        id = request.GET.get('scholarship')
    query_results = Scholarship.objects.all()
    form = ScholarshipForm()
    data = {
            'query_results':query_results,
            'form': form
           }
    return render(request, 'hrfinance/add_remove_scholarship.html', data)

您需要将查询移出else 条件。

虽然，随着数据库中行数的增加，这种方法会花费很多时间。更好的方法是使用jquery Ajax 方法更新数据库中的数据，并在数据库更新后使用javascript/Jquery 动态显示。