在django中，如何区分从HTML表单提交的HTTP请求和从客户端提交的HTTP请求？

我在django有一个模型，如下所示：

class Student(Model):
    nationality = CharField(max_length=200)

class StudentForm(ModelForm):

    class Meta:
        model = Student
        fields = ('nationality', )

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('nationality'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form}) 

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
      <input type="hidden" id="hidden" name="hidden" value="hidden">
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('hidden'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form})

我有以下表格：

class Student(Model):
    nationality = CharField(max_length=200)

class StudentForm(ModelForm):

    class Meta:
        model = Student
        fields = ('nationality', )

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('nationality'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form}) 

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
      <input type="hidden" id="hidden" name="hidden" value="hidden">
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('hidden'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form})

我的模板如下：

class Student(Model):
    nationality = CharField(max_length=200)

class StudentForm(ModelForm):

    class Meta:
        model = Student
        fields = ('nationality', )

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('nationality'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form}) 

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
      <input type="hidden" id="hidden" name="hidden" value="hidden">
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('hidden'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form})

此方法的问题是，如果sb提交表单时未填写国籍字段，则结果将是“从客户端请求获取”，这是错误的，因为验证错误应该发生，因为请求是从提交表单而不是直接从客户端获取请求。 我所能做的是在我的表单中添加一个隐藏字段，如下所示：

class Student(Model):
    nationality = CharField(max_length=200)

class StudentForm(ModelForm):

    class Meta:
        model = Student
        fields = ('nationality', )

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('nationality'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form}) 

<form method="GET" novalidate id="my_form">
      {{ student_form.as_p }}
      <input type="hidden" id="hidden" name="hidden" value="hidden">
</form>
<button type="submit" form="my_form" name="my_form">Submit</button>

def home(request):
    if request.POST:
        return HttpResponse('This should never happen')
    else:
        if request.GET.get('hidden'):
            student_form = StudentForm(request.GET)
            if student_form.is_valid():
                return HttpResponse('get from form submission')
        else:
            student_form = StudentForm()
            print('get from client request')
            return render(request, my_template, {'student_form': student_form})

---

然而，应该有另一种方法来做到这一点。HTTP中应该有一些东西告诉我们请求是来自客户端的新get请求，或者是来自表单提交。我在找这个。

请求。GET

是一本字典

request.GET.GET（'nationality'）

如果字典没有键

'nationality'

，但如果其值是空字符串（

？nationality=

），则它是错误的。因此，您只需检查密钥是否存在，这样您就知道表单已提交：

if 'nationality' in request.GET:
    # initialise form with `request.GET`
else:
    # initial unbound form

---

若要提交包含数据的表单，方法应为“post”，若request.method为“post”，则应检查表单中提交的数据因为我想将表单数据传输到下一页，在下一页中有一个更大的表单，该表单应该部分地预先填充主页表单的数据，并且在下一页中也有不同的场景（直接从客户端获取、提交页面表单以及提交第二页分页页面表单），我需要使用get方法。使用get发送非敏感数据没有问题。部分原因在这里解释：“if request.get.get（'national'）”如果这是真的，那么form.is\u valid将是真的，因为我认为nationallity是表单中唯一的字段。检查print（request.GET.GET（'national'））的值，检查什么“print（request.GET.GET（'national'）”正在打印。您没有注意到主要问题。由于模型中的null和blank为false，因此模型表单验证要求提交的表单填写国籍（带有sth）。这就是我想要的！！！但是，如果sb提交按钮时没有填写国籍字段，则会发生以下情况：``否则：student\u form=StudentForm（）print（'get from client request'）返回render（request，my\u template，{'student\u form'：student\u form}）``这不是我想要的。