如何将默认日期字段放在具有在django之前给定的先前日期的表单中

from django import forms
from .models import Event

class EventForm(forms.ModelForm):
    class Meta:
        model = Event
        fields = ['event_date', 'other_fields']  # 添加其他需要的字段

    def __init__(self, *args, **kwargs):
        super(EventForm, self).__init__(*args, **kwargs)
        if 'instance' in kwargs and kwargs['instance'].pk:
            self.fields['event_date'].initial = kwargs['instance'].event_date

from django.shortcuts import render, get_object_or_404
from .models import Event
from .forms import EventForm

def edit_event(request, event_id):
    event = get_object_or_404(Event, pk=event_id)
    if request.method == 'POST':
        form = EventForm(request.POST, instance=event)
        if form.is_valid():
            form.save()
            # 重定向到事件列表或其他页面
    else:
        form = EventForm(instance=event)
    return render(request, 'edit_event.html', {'form': form})

<form method="post">
    {% csrf_token %}
    {{ form.as_p }}
    <button type="submit">Save</button>
</form>