DJANGO将AJAX请求中的新结果值呈现到HTML页面 [英] DJANGO render new result values from AJAX request to HTML page

问题描述

最近几天，我试图在后端使用AJAX和django学习表单提交.

in the last days i trying to learn form submission using AJAX and django in backend.

我可以在django views.py(validate_number)(工作)中使用AJAX成功地获取输入值，请按照以下

I can take successfully form inputs values using AJAX in django views.py (validate_number) (working) follow this example . in this views.py validate_number i calculate NEW sum of numbers and i want this sum value to render back to html page,but i don't know how to do.

任何想法如何将AJAX请求的结果呈现回html页面?

any idea how to render results from AJAX request back to html page ?

此处是代码

html形式:

<form id="form" action='' data-validate-number-url="{% url 'validate_number' %}" method="POST" enctype="multipart/form-data">{% csrf_token %}
<div class="form-group col-md-6">
Select the C Raster Dataset:<br>
   <select name="CC" class="form-control" id="CC"> 
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
Select the P:<br>
   <select name="PP" class="form-control" id="PP">
     <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
Select the F:<br>
   <select name="FF" class="form-control" id="FF">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
    </div>
<button type="button" class="btn btn-primary next-step1">Save and continue</button>


    <p>{{sum}}</p>


Select the GG:<br>
   <select name="G" class="form-control" id="GG">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
Select the JJ:<br>
   <select name="JJ" class="form-control" id="JJ">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
<button type="button" class="btn btn-primary next-step">Save and continue</button>
Select the FINAL:<br>
   <select name="FINAL" class="form-control" id="FINAL">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
    <option value="10">ten</option>
  </select>
 <button type="submit" class="btn btn-primary">Save</button>
</form>

AJAX

$(".next-step1").click(function (e) {
var form = $(this).closest("form");
var number1 = $("#CC").val();
var number2 = $("#PP").val();
$.ajax({
url: form.attr("data-validate-number-url"),
data:  {
      'number1': number1,
      'number2':number2
    },
dataType: 'json',
success: function (data) {
}
});

urls.py:

url(r'^details/(?P<slug>[^\.]+)/$', views.blog_details, name='blog_details'),
url(r'^ajax/validate_number/$', views.validate_number, name='validate_number'),

views.py

def blog_details(request,slug):
    posts=mymodel.objects.all()
    post=get_object_or_404(posts, slug_title=slug)
    return render(request,'index.html',{'post':post})


def validate_number(request):
    number1 = request.GET.get('number1', None)
    print number1
    number2 = request.GET.get('number2', None)
    print number2
    sum=int(number1)+int(number2)
    return JsonResponse(sum)

推荐答案

在您的AJAX成功块中，您必须告诉它您希望它如何处理这些信息:

In your AJAX success block, you have to tell it what you want it to do with the information:

$(".next-step1").click(function (e) {
var form = $(this).closest("form");
var number1 = $("#CC").val();
var number2 = $("#PP").val();
$.ajax({
url: form.attr("data-validate-number-url"),
data:  {
      'number1': number1,
      'number2':number2
    },
dataType: 'json',
success: function (data) {
// 'data' is the dictionary received from the view.
// You could call it whatever you want.
    $('#sum).html(data.sum_json);
    /* Find 'id="sum"' and replace what's inside the tags(or innerHTML)
       with the dictionary value of 'sum_json'.
       If other keys exist in the 'data' dictionary,
       they are accessed the same way, as in 'data.sum_json_2'.
    */
}
});

index.html

index.html

<form id="form" action='' data-validate-number-url="{% url 'validate_number' %}" method="POST" enctype="multipart/form-data">{% csrf_token %}
<div class="form-group col-md-6">
Select the C Raster Dataset:<br>
   <select name="CC" class="form-control" id="CC"> 
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
Select the P:<br>
   <select name="PP" class="form-control" id="PP">
     <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
Select the F:<br>
   <select name="FF" class="form-control" id="FF">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
    </div>
<button type="button" class="btn btn-primary next-step1">Save and continue</button>


    <p id="sum"></p>


Select the GG:<br>
   <select name="G" class="form-control" id="GG">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
Select the JJ:<br>
   <select name="JJ" class="form-control" id="JJ">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
  </select>
<button type="button" class="btn btn-primary next-step">Save and continue</button>
Select the FINAL:<br>
   <select name="FINAL" class="form-control" id="FINAL">
    <option value="1">one</option>
    <option value="2">two</option>
    <option value="3">three</option>
    <option value="10">ten</option>
  </select>
 <button type="submit" class="btn btn-primary">Save</button>
</form>

视图

def blog_details(request,slug):
    posts=mymodel.objects.all()
    post=get_object_or_404(posts, slug_title=slug)
    return render(request,'index.html',{'post':post})


def validate_number(request):
    # You had request.GET, but your form method is POST.
    number1 = request.POST.get('number1', None)
    print number1
    number2 = request.POST.get('number2', None)
    print number2
    sum=int(number1)+int(number2)
    # render a template with the given key: value to be sent to AJAX.
    sum_json = render_to_string('sum_template.html', {'sum': sum})
    """
    Assuming the information for sum_2 etc. uses the same format,
    we can use the same template
    """
    sum_json_2 = render_to_string('sum_template.html', {'sum': sum_2})
    # Send the dictionary to AJAX. This is what we called 'data'.
    return JsonResponse({'sum_json': sum_json, 'sum_json_2': sum_json_2})

这是我们render_to_string发送到AJAX的模板.它以与render相同的方式呈现模板.

This is the template that we render_to_string to send to the AJAX. It renders templates the same way render does.

sum_template.html

sum_template.html

{{ sum }}

您不想render_to_string index.html，因为您将整个index模板插入了<p>内，而不仅仅是sum.您可能还想在视图中添加if语句

You do not want to render_to_string index.html because you insert the whole index template inside the <p>, not just sum. You probably also want to add an if statement to your view

if request.is_ajax() and request.POST:

过滤掉非AJAX请求.

to filter out the non-AJAX requests.

有人告诉我，有更好的方法可以做到这一点.我只是自己弄清楚这一切，不知道它们是什么.如果您需要更多详细信息，请告诉我.

I've been told there are better ways to do it. I just figured all this out myself, and don't know what they are. If you need more detail let me know.

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