带有自定义字段模板的Django Crispy Forms不会添加要请求的字段的值

Question

我在我的项目中使用Django 1.10和django-crispy-forms 1.6.1。 我添加了一个似乎正常运行的自定义datetimepicker下拉模板。 我现在遇到的问题是，每当我尝试提交表单时，我都会在字段上显示错误，并且需要它。 似乎在提交表单后，字段被清除，错误类被添加到字段中。

提交后，表单显示错误

当我检查控制台时，我没有收到任何错误，但是当我检查Chrome DevTools时，我查看了服务器端发送的请求有效负载，我发现该字段根本没有添加到请求中。 这是来自开发工具的请求有效负载的图片。

DevTools请求有效负载而没有“time_stamp”

当输入获得焦点时，我能够将datetimepicker下拉到下拉，这似乎工作得很好。 以下是我的表单/视图和自定义template.html的相关代码：

models.py

class Call(models.Model):
    history = AuditlogHistoryField()
    analyst = models.ForeignKey(settings.AUTH_USER_MODEL, models.SET_NULL, blank=True, null=True, limit_choices_to={'is_staff': True}, related_name='call_analyst')
    contact = models.CharField(max_length=50)
    time_stamp = models.DateTimeField(default=datetime.now)
    description = models.CharField(max_length=512)
    ticket = models.PositiveIntegerField(blank=True, null=True)
    CALL_TYPE = (
        ('M', 'Made'),
        ('R', 'Received'),
    )
    call_type = models.CharField(max_length=1, choices=CALL_TYPE)
    created_at = models.DateTimeField(auto_now_add=True)
    modified_at = models.DateTimeField(auto_now=True)

    @python_2_unicode_compatible
    def __str__(self):
        return "Call instance {}".format(self.pk)

forms.py

class CallForm(forms.ModelForm):
    description = forms.CharField(widget=forms.Textarea)

    class Meta:
        model = Call
        fields = ['analyst', 'contact', 'time_stamp', 'description', 'ticket', 'call_type']

    def __init__(self, *args, **kwargs):
        super(CallForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper(self)
        self.helper.form_tag = True
        self.helper.form_class = 'form-horizontal'
        self.helper.label_class = 'col-sm-3'
        self.helper.field_class = 'col-sm-9'
        self.helper.layout = Layout(
            Field('analyst'),
            Field('contact'),
            Field('time_stamp', template="datetimepicker.html"),
            Field('description'),
            Field('ticket'),
            Field('call_type'),
        )

    def is_valid(self):
        return super(CallForm, self).is_valid()

    def full_clean(self):
        return super(CallForm, self).full_clean()

    def clean_analyst(self):
        analyst = self.cleaned_data.get("analyst", None)
        return analyst

    def clean_contact(self):
        contact = self.cleaned_data.get("contact", None)
        return contact

    def clean_time_stamp(self):
        time_stamp = self.cleaned_data.get("time_stamp", None)
        return time_stamp

    def clean_description(self):
        description = self.cleaned_data.get("description", None)
        return description

    def clean_ticket(self):
        ticket = self.cleaned_data.get("ticket", None)
        return ticket

    def clean_call_type(self):
        call_type = self.cleaned_data.get("call_type", None)
        return call_type

    def clean(self):
        return super(CallForm, self).clean()

    def validate_unique(self):
        return super(CallForm, self).validate_unique()

    def save(self, commit=True):
        return super(CallForm, self).save(commit)

views.py

class CallCreateView(AjaxCreateView):
    model = Call
    form_class = CallForm
    # fields = ['analyst', 'contact', 'call_timestamp', 'description', 'ticket', 'call_type']
    template_name = "reports/../_templates/create_update_template.html"
    success_url = reverse_lazy("call_list")

    def __init__(self, **kwargs):
        super(CallCreateView, self).__init__(**kwargs)

    def dispatch(self, request, *args, **kwargs):
        return super(CallCreateView, self).dispatch(request, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        return super(CallCreateView, self).get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return super(CallCreateView, self).post(request, *args, **kwargs)

    def get_form_class(self):
        return super(CallCreateView, self).get_form_class()

    def get_form(self, form_class=None):
        return super(CallCreateView, self).get_form(form_class)

    def get_form_kwargs(self, **kwargs):
        return super(CallCreateView, self).get_form_kwargs()

    def get_initial(self):
        return super(CallCreateView, self).get_initial()

    def form_invalid(self, form):
        return super(CallCreateView, self).form_invalid(form)

    def form_valid(self, form):
        obj = form.save(commit=False)
        obj.save()
        return super(CallCreateView, self).form_valid(form)

    def get_context_data(self, **kwargs):
        ret = super(CallCreateView, self).get_context_data(**kwargs)
        return ret

    def render_to_response(self, context, **response_kwargs):
        return super(CallCreateView, self).render_to_response(context, **response_kwargs)

    def get_template_names(self):
        return super(CallCreateView, self).get_template_names()

    def get_success_url(self):
        return reverse("call_detail", args=(self.object.pk,))

datetimepicker.html

{% load crispy_forms_field %}

<div{% if div.css_id %} id="{{ div.css_id }}"{% endif %}
                        class="form-group{% if form_show_errors and field.errors %} has-error{% endif %}{% if field.css_classes %} {{ field.css_classes }}{% endif %}{% if div.css_class %} {{ div.css_class }}{% endif %}">
    {% if field.label and form_show_labels %}
        <label for="{{ field.id_for_label }}"
               class="control-label {{ label_class }}{% if field.field.required %} requiredField{% endif %}">
            {{ field.label|safe }}{% if field.field.required %}<span class="asteriskField">*</span>{% endif %}
        </label>
    {% endif %}

    <div class="controls date datetimepicker col-sm-9" id="{{ field.id_for_label }}"
         data-link-field="{{ field.id_for_label }}" {{ flat_attrs|safe }}>
        <input class="form-control" id="{{ field.id_for_label }}" type="text">
    </div>
    <input type="hidden" id="{{ field.id_for_label }}" value=""/><br/>
    {% include 'bootstrap3/layout/help_text_and_errors.html' %}
</div>

{% block datetimepicker %}
    <script type="text/javascript">
        $(function () {
            $('#{{ field.id_for_label }}').datetimepicker({
                sideBySide: true,
                allowInputToggle: true,
                showTodayButton: true,
                showClear: true,
                showClose: true,
                toolbarPlacement: "top",
                format: "dddd, MMMM Do YYYY, h:mm A"
            })
        })
    </script>
{% endblock %}

我认为我的模板或者django-crispy-forms如何处理使用自定义模板的字段一定存在问题，因为当我从表单助手中删除模板时，会使用常规输入框并提交日期时间字符串django很好。 谢谢大家的帮助。 对不起，我必须链接图像，我没有足够高的代表嵌入他们。

Answer 1

我认为time_stamp没有被发送到服务器的原因是因为datepicker input标签没有name属性：

<input class="form-control" id="{{ field.id_for_label }}" type="text">

看看w3schools中的笔记 ：

注意：只有具有name属性的表单元素才会在提交表单时传递其值。