【发布时间】：2021-03-09 02:37:32
【问题描述】：
一般任务：有一个显示在表格视图中的事件列表，用户单击事件并被重定向到单个事件页面，该页面显示有关事件的额外信息。
此模板上有一个按钮，该按钮应提供在用户选择的事件列表中记录事件的一些数据的功能。
而且我真的不明白如何将事件数据传递到表单中来创建user_event，也许我选择了错误的方式来创建模型的实例？
模型.py
class Event(models.Model):
LANGUAGE_CHOICES = [
('EN', 'English'), ('IT', 'Italian'), ('FR', 'French'), ('DE', 'German'), ('RU', 'Russian'), ]
STATUS_CHOICES = [('draft', 'Draft'), ('confirmed', 'Confirmed'), ]
FORMAT_CHOICES = [('live', 'Live'), ('online', 'Online'), ]
TOPIC_CHOICES = [('cataract', 'Cataract'),
('vitreo', 'Vitreoretinal'),
('optometry', 'Optometry'),
('multi', 'Multidisciplinary'),
('plastic', 'Plastic and Reconstructive surgery'),
('onco', 'Ocular oncology'),
('glaucoma', 'Glaucoma'),
('pediatrics', 'Pediatrics'), ]
title = models.CharField(
max_length=250, verbose_name='Event', db_index=True, default="Event")
slug = models.SlugField(max_length=250, unique_for_date='publish')
kol = models.ManyToManyField(
Kol, verbose_name='Presenter', db_index=True, blank=True)
body = models.TextField(verbose_name='Description', blank=True)
publish = models.DateTimeField(default=timezone.now)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
sponsor = models.CharField(
max_length=150, verbose_name='Sponsored by', default='')
organizer = models.CharField(
max_length=150, verbose_name='Organized by', default='')
topic = models.CharField(
max_length=100, choices=TOPIC_CHOICES, default='multi', verbose_name='Discipline')
status = models.CharField(
max_length=100, choices=STATUS_CHOICES, default='draft')
event_format = models.CharField(
max_length=50, choices=FORMAT_CHOICES, default='online', verbose_name='Format', db_index=True)
main_language = models.CharField(
max_length=50, choices=LANGUAGE_CHOICES, default='EN', verbose_name='Main language', db_index=True)
event_url = models.URLField(blank=True)
event_date_start = models.DateField(
verbose_name='Start date', db_index=True)
event_time_start = models.TimeField(default='09:00')
event_date_finish = models.DateField(
verbose_name='End date', auto_now=True)
event_time_finish = models.TimeField(default='18:00')
is_cme = models.BooleanField(
default=False, verbose_name='CME credits', db_index=True)
objects = models.Manager() # the default manager
published = PublishedManager() # published manager
futured = FutureManager() # future dates only
# follow check
users_follow = models.ManyToManyField(
settings.AUTH_USER_MODEL, related_name='events_liked', blank=True)
class Meta:
ordering = ('event_date_start',)
def __str__(self):
return self.title
def get_kols(self):
return "\n".join([str(p) for p in self.kol.all()])
def save(self, *args, **kwargs):
if not self.slug:
self.slug = slugify(self.title)
super(Event, self).save(*args, **kwargs)
@property
def _month(self):
return datetime.date(self.event_date_start).month
event_month = property(_month)
def get_absolute_url(self):
return reverse('events:event_detail', args=[self.publish.year,
self.publish.strftime(
'%m'),
self.publish.strftime(
'%d'),
self.slug])
class UserEvent(models.Model):
follower = models.ForeignKey(
User, related_name='user_events', on_delete=models.CASCADE)
my_event = models.ForeignKey(
Event, related_name='selected_event', on_delete=models.CASCADE)
title = models.CharField(
max_length=250, verbose_name='Event', db_index=True, default="Event")
event_url = models.URLField(blank=True)
event_date_start = models.DateField(
verbose_name='Start date')
event_date_finish = models.DateField(
verbose_name='End date')
class Meta:
ordering = ['-event_date_start']
def save(self, *args, **kwargs):
created = not self.pk
super().save(*args, **kwargs)
if created:
UserEvent.objects.create(user=self)
def __str__(self):
return self.title
forms.py
class UserEventForm(forms.ModelForm):
class Meta:
model = UserEvent
fields = ("title", "event_url",
"event_date_start", "event_date_finish")
带有按钮的detail.html
{% extends 'bbase11.html' %} {% block title %} {{ event.title}} {% endblock %} {% block content %}
<div class="container">
<h1> {{ event.title }}</h1>
<p class='event_descr'> {{event.body}}</p>
<p> Presenting professionals {{event.get_kols}}</p>
<div>Organized by {{event.organizer}}</div>
<div>Sponsored by {{event.sponsor}}</div>
<div>
<form action= "{% url "events:add_event" %}" method = "POST" >
{{form.as_p}}
{% csrf_token %}
<input id='event' type='hidden' value = {{event.id}}>
<button type="submit" class="btn btn-outline-primary btn-sm m-0 waves-effect">Add to calendar</button></div>
</form>
</div>
{% endblock %}
views.py
def event_detail(request, year, month, day, event):
event = get_object_or_404(Event, slug=event,
status='confirmed',
publish__year=year,
publish__month=month,
publish__day=day)
return render(request, 'events/event/detail.html', {'event': event, 'add_event': add_event})
@login_required
def add_event(request):
if request.method == 'POST':
form = UserEventForm(request.POST or None)
if form.is_valid():
form.save()
messages.success(request, ("Event has been added"))
return redirect('event_list')
else:
messages.error(request, ("Event has not been added"))
return redirect('events:event_list')
else:
events = Event.futured.all()
return render(request, 'list.html', {'events': events})
【问题讨论】：
-
您好，我真的看不出您的问题是什么，因为这个问题对于什么有效，什么无效并不十分准确。从您的代码中，我可以看到当您使用
form.save()doc 时创建了一个 UserEvent。你有什么错误吗？ -
您只是想用数据预填充表单吗？
-
是的，这就是想法，我需要从 Event 实例中获取几个字段并创建一个用户特定的 UserEvent 实例。我不需要用户输入任何内容。
-
然后你可以使用上面的链接到 save() 方法，它告诉你如何预填充表单：
f = ArticleForm(request.POST, instance=a)
标签： python django django-models django-forms