Django - 检测页面中提交了哪个表单

Question

我在同一个页面上有多个表单域和多个提交按钮。我想检测触发 POST 请求的表单字段。

我正在使用 CBV 并且我的 post() 方法是这样的:

def post(self, request, **kwargs):

    ....

    form1 = Form1(request.POST, instance=Model1.objects.filter(some_filtering...)
    form2 = Form2(request.POST, instance=Model2.objects.filter(some_filtering...)
    form3 = Form3(request.POST, instance=Model3.objects.filter(some_filtering...)
    form4 = Form4(request.POST, instance=Model4.objects.filter(some_filtering...)


    # this is the code I want to know
    if POST request is triggered by form1...

        # do something....          

        return super().post(request, **kwargs)


    return super().post(request, **kwargs)

如何检测哪个表单触发了 POST 请求？

Answer 1

我通过在 HTML 模板中使用 input 标签而不是 button 标签来提交表单来做到这一点

<form name="form-1" method="POST" action="{% url 'view_url_name'%}">
  {% csrf_token %}
  {{ form }}
  <!--use input tag for submit button --> 
  <input class="btn mt-3 btn-primary" name="form-1-submit" value="Submit" type="submit"/>
</form>

Note: use the different name for each form submit input.

现在在您的 View 中，您可以简单地检查按钮的 name 属性。

if 'form-1-submit' in request.POST:
    form1 = Form1(request.POST, instance=Model1.objects.filter(some_filtering...)
...
# and so on    

This implementation will also cover the scenario where you are submitting the same form from different buttons to use that form data for different purposes.