Python Django 2表单无效，即使在有效表单数据上也无法工作

我正在开发一个非常简单的表单来在Django（2）中发布数据，但总是将表单作为无效表单，因为

form.is\u valid（）

没有被调用

以下是我目前掌握的情况：

来自

models.py

：

class UserGroup(models.Model):
    email = models.EmailField(primary_key=True)
    group = models.CharField(max_length=250, default='notingroup')

    def __str__(self):
        return self.group

class UserGroupForm(forms.ModelForm):
    class Meta:
        model = UserGroup
        fields = ('group', 'email')

def group_name(request):
    error = ''
    if request.method == 'POST':
        print(request.POST['email'])
        group_form = UserGroupForm(request.POST)
        print(group_form)
        if group_form.is_valid():
            ug_obj = UserGroup()
            ug_obj.group = group_form.cleaned_data['group']
            ug_obj.email = group_form.cleaned_data['email']
            ug_obj.save()
            return JsonResponse({"message": 'Got it inside valid'})

        else:
            error = 'Something went wrong'
            print(error)

        return JsonResponse({"message": 'an error occurs!'})

<form method="post" id="gitForm" action="javascript:call_my_form()">
                {% csrf_token %}
                <label>Groupname: </label>
                <input id="user_email" type="text" value="{{ user.email }}" hidden>
                <input id="input" type="text" class="">
                <input type="submit" value="Mehet" class="btn btn-primary">
       <div id="error" style="color:red"></div>
</form>

function call_my_form() {
    $(document).on('submit', '#gitForm', function (e) {
        e.preventDefault();
        console.log($('#input').val());
        console.log($('#user_email').val());
        $.ajax({
            type: 'POST',
            url: '/groupname',
            data: {
                group: $('#input').val(),
                email: $('#user_email').val(),
                csrfmiddlewaretoken: $('input[name=csrfmiddlewaretoken]').val()
            },
            success: function (jsonResponse) {
                document.getElementById("demo").innerHTML = jsonResponse.message;

            }
        }).done(function (jsonResponse) {
            document.getElementById("demo").innerHTML = jsonResponse.message;
        })
    });
}

来自

forms.py

：

class UserGroup(models.Model):
    email = models.EmailField(primary_key=True)
    group = models.CharField(max_length=250, default='notingroup')

    def __str__(self):
        return self.group

class UserGroupForm(forms.ModelForm):
    class Meta:
        model = UserGroup
        fields = ('group', 'email')

def group_name(request):
    error = ''
    if request.method == 'POST':
        print(request.POST['email'])
        group_form = UserGroupForm(request.POST)
        print(group_form)
        if group_form.is_valid():
            ug_obj = UserGroup()
            ug_obj.group = group_form.cleaned_data['group']
            ug_obj.email = group_form.cleaned_data['email']
            ug_obj.save()
            return JsonResponse({"message": 'Got it inside valid'})

        else:
            error = 'Something went wrong'
            print(error)

        return JsonResponse({"message": 'an error occurs!'})

<form method="post" id="gitForm" action="javascript:call_my_form()">
                {% csrf_token %}
                <label>Groupname: </label>
                <input id="user_email" type="text" value="{{ user.email }}" hidden>
                <input id="input" type="text" class="">
                <input type="submit" value="Mehet" class="btn btn-primary">
       <div id="error" style="color:red"></div>
</form>

function call_my_form() {
    $(document).on('submit', '#gitForm', function (e) {
        e.preventDefault();
        console.log($('#input').val());
        console.log($('#user_email').val());
        $.ajax({
            type: 'POST',
            url: '/groupname',
            data: {
                group: $('#input').val(),
                email: $('#user_email').val(),
                csrfmiddlewaretoken: $('input[name=csrfmiddlewaretoken]').val()
            },
            success: function (jsonResponse) {
                document.getElementById("demo").innerHTML = jsonResponse.message;

            }
        }).done(function (jsonResponse) {
            document.getElementById("demo").innerHTML = jsonResponse.message;
        })
    });
}

来自

视图.py

：

class UserGroup(models.Model):
    email = models.EmailField(primary_key=True)
    group = models.CharField(max_length=250, default='notingroup')

    def __str__(self):
        return self.group

class UserGroupForm(forms.ModelForm):
    class Meta:
        model = UserGroup
        fields = ('group', 'email')

def group_name(request):
    error = ''
    if request.method == 'POST':
        print(request.POST['email'])
        group_form = UserGroupForm(request.POST)
        print(group_form)
        if group_form.is_valid():
            ug_obj = UserGroup()
            ug_obj.group = group_form.cleaned_data['group']
            ug_obj.email = group_form.cleaned_data['email']
            ug_obj.save()
            return JsonResponse({"message": 'Got it inside valid'})

        else:
            error = 'Something went wrong'
            print(error)

        return JsonResponse({"message": 'an error occurs!'})

<form method="post" id="gitForm" action="javascript:call_my_form()">
                {% csrf_token %}
                <label>Groupname: </label>
                <input id="user_email" type="text" value="{{ user.email }}" hidden>
                <input id="input" type="text" class="">
                <input type="submit" value="Mehet" class="btn btn-primary">
       <div id="error" style="color:red"></div>
</form>

function call_my_form() {
    $(document).on('submit', '#gitForm', function (e) {
        e.preventDefault();
        console.log($('#input').val());
        console.log($('#user_email').val());
        $.ajax({
            type: 'POST',
            url: '/groupname',
            data: {
                group: $('#input').val(),
                email: $('#user_email').val(),
                csrfmiddlewaretoken: $('input[name=csrfmiddlewaretoken]').val()
            },
            success: function (jsonResponse) {
                document.getElementById("demo").innerHTML = jsonResponse.message;

            }
        }).done(function (jsonResponse) {
            document.getElementById("demo").innerHTML = jsonResponse.message;
        })
    });
}

来自

html模板

：

class UserGroup(models.Model):
    email = models.EmailField(primary_key=True)
    group = models.CharField(max_length=250, default='notingroup')

    def __str__(self):
        return self.group

class UserGroupForm(forms.ModelForm):
    class Meta:
        model = UserGroup
        fields = ('group', 'email')

def group_name(request):
    error = ''
    if request.method == 'POST':
        print(request.POST['email'])
        group_form = UserGroupForm(request.POST)
        print(group_form)
        if group_form.is_valid():
            ug_obj = UserGroup()
            ug_obj.group = group_form.cleaned_data['group']
            ug_obj.email = group_form.cleaned_data['email']
            ug_obj.save()
            return JsonResponse({"message": 'Got it inside valid'})

        else:
            error = 'Something went wrong'
            print(error)

        return JsonResponse({"message": 'an error occurs!'})

<form method="post" id="gitForm" action="javascript:call_my_form()">
                {% csrf_token %}
                <label>Groupname: </label>
                <input id="user_email" type="text" value="{{ user.email }}" hidden>
                <input id="input" type="text" class="">
                <input type="submit" value="Mehet" class="btn btn-primary">
       <div id="error" style="color:red"></div>
</form>

function call_my_form() {
    $(document).on('submit', '#gitForm', function (e) {
        e.preventDefault();
        console.log($('#input').val());
        console.log($('#user_email').val());
        $.ajax({
            type: 'POST',
            url: '/groupname',
            data: {
                group: $('#input').val(),
                email: $('#user_email').val(),
                csrfmiddlewaretoken: $('input[name=csrfmiddlewaretoken]').val()
            },
            success: function (jsonResponse) {
                document.getElementById("demo").innerHTML = jsonResponse.message;

            }
        }).done(function (jsonResponse) {
            document.getElementById("demo").innerHTML = jsonResponse.message;
        })
    });
}

我正在将正确的数据输入视图，但仍然是

表单。是否有效（）

未被调用

以下是输出：

**********@mail.com

组：
电子邮件：
已使用此电子邮件的用户组
存在。

出了点问题[18/Jul/2019 09:47:47] “POST/groupname HTTP/1.1”200 31

---

正如您的输出中所说：

包含此电子邮件的用户组已经存在。

---

所以你试图提交一封已经存在的电子邮件。这就是为什么您的

表单.is\u valid（）

没有被调用。

您应该在else块中打印

组表单.errors

，以准确查看问题所在。更好的是，在JSONResponse中返回它，因为电子邮件是主键，它是唯一的，因此您使用了相同的电子邮件地址。