问Django DateTimeInput类型的“日期时间-本地”不保存到数据库

EN

from django.db.models.functions import datetime

class Entry(models.Model):
    ENTRY = 'entry'
    EXIT = 'exit'

    ENTRY_TYPE_CHOICES = [
        (ENTRY, 'Entry'),
        (EXIT, 'Exit'),
    ]

    class Meta:
        verbose_name = "Entry"
        verbose_name_plural = "Entries"

    trade = models.ForeignKey(Trade, on_delete=models.CASCADE)
    date = models.DateTimeField(null=True, blank=True, default=datetime.datetime.now)
    amount = models.FloatField(null=True)
    price = models.FloatField(null=True, blank=True)
    fee = models.FloatField(null=True, blank=True)
    entry_type = models.CharField(max_length=5, choices=ENTRY_TYPE_CHOICES, default=ENTRY)

class EntriesForm(ModelForm):
    class Meta:
        model = Entry
        exclude = ()
        widgets = {
            'date': forms.DateTimeInput(attrs={'type':'datetime-local', 'class':'form-control'}),
        }

EntriesFormSet = inlineformset_factory(Trade, Entry, form=EntriesForm, extra=1)

class TradeUpdateView(UpdateView):
    model = Trade
    form_class = CreateForm
    success_url = reverse_lazy('trade-list')

    def get_context_data(self, **kwargs):
        data = super(TradeUpdateView, self).get_context_data(**kwargs)
        if self.request.POST:
            data['entries'] = EntriesFormSet(self.request.POST, instance=self.object)
        else:
            data['entries'] = EntriesFormSet(instance=self.object)
        return data

    def form_valid(self, form):
        form.instance.user = self.request.user
        form.instance.created_by = self.request.user
        context = self.get_context_data()
        entries = context['entries']
        with transaction.atomic():
            self.object = form.save()

            if entries.is_valid():
                entries.instance = self.object
                entries.save()
        return super(TradeUpdateView, self).form_valid(form)

{% extends 'dashboard/base.html' %}
{% load static %}

{% block content %}

<script type="text/javascript" src="{% static 'vendor/jquery/jquery.js' %}"></script>
<script type="text/javascript" src="{% static 'admin/js/vendor/jquery/jquery.js' %}"></script>

<!-- Page Heading -->
<div class="d-sm-flex align-items-center justify-content-between mb-3">
    <h2>New Trade</h2>
</div>

<div class="row">
    <div class="col">
        <form action="" method="post">{% csrf_token %}
            {{ form.as_p }}

            <table class="table">
                {{ entries.management_form }}

                {% for form in entries.forms %}
                {% if forloop.first %}
                <thead>
                <tr>
                    {% for field in form.visible_fields %}
                    <th>{{ field.label|capfirst }}</th>
                    {% endfor %}
                </tr>
                </thead>
                {% endif %}
                <tr class="{% cycle row1 row2 %} formset_row">
                    {% for field in form.visible_fields %}
                    <td>
                        {# Include the hidden fields in the form #}
                        {% if forloop.first %}
                        {% for hidden in form.hidden_fields %}
                        {{ hidden }}
                        {% endfor %}
                        {% endif %}
                        {{ field.errors.as_ul }}
                        {{ field }}
                    </td>
                    {% endfor %}
                </tr>
                {% endfor %}
            </table>
            <input type="submit" value="Save"/> <a href="{% url 'trade-list' %}">back to the list</a>
        </form>
    </div>


</div>


<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="{% static 'js/formset/jquery.formset.js' %}"></script>
<script type="text/javascript">
    $('.formset_row').formset({
        addText: 'add entry',
        deleteText: 'remove',
        prefix: 'entry_set'
    });

</script>


{% endblock content %}