我有课堂申请和跟随关系。用户可以互相关注并创建教室。当用户创建教室时,他只能邀请跟随他的人。 “课堂”模型是一个m2m到用户表。
我有模特。吡啶:
class Classroom(models.Model):
creator = models.ForeignKey(User)
classname = models.CharField(max_length=140, unique = True)
date = models.DateTimeField(auto_now=True)
open_class = models.BooleanField(default=True)
members = models.ManyToManyField(User,related_name="list of invited members")
并在以下应用程序的models.py中:
class Relations(models.Model):
initiated_by = models.ForeignKey(User, editable=False)
date_initiated = models.DateTimeField(auto_now=True, editable = False)
follow = models.ForeignKey(User, editable = False, related_name = "follow")
date_follow = models.DateTimeField(auto_now=True, editable = False)
并在教室应用的views.py中:
def save_classroom(request, username):
if request.method == 'POST':
u = User.objects.get(username=username)
form = ClassroomForm(request.POST, request.FILES)
if form.is_valid():
new_obj = form.save(commit=False)
new_obj.creator = request.user
r = Relations.objects.filter(initiated_by = request.user)
# new_obj.members =
new_obj.save()
return HttpResponseRedirect('.')
else:
form = ClassroomForm()
return render_to_response('classroom/classroom_form.html', {
'form': form,
},
context_instance=RequestContext(request))
我正在使用ModelForm作为课堂表单,默认视图考虑到我与User表的多对多关系,在字段成员中,是我数据库中所有用户的列表。 但我只希望在该列表中与登录用户建立关系的用户 - 创建教室的用户。 我怎么能这样做?
p.s:同样,当我保存表单时,它会保存,但没有“成员”
谢谢!
答案 0 :(得分:1)
您必须更改用于填充表单域的查询集...将以下内容放入表单类中:
def __init__(self, *args, **kwargs):
user = kwargs.pop('user')
super(ClassroomForm, self).__init__(*args, **kwargs)
relations = Relations.objects.filter(initiated_by=user)
self.fields["members"].queryset = \
User.objects.filter(pk__in=[r.follow.pk for r in relations])
要让当前用户使用表单的__init__
方法,请在save_classrom
视图中更改其未经初始化:
form = ClassroomForm(request.POST, request.FILES, user=request.user)
# and after the else:
form = ClassroomForm(user=request.user)
我不太确定为您的字段获取用户的查询,但我认为应检查initiate_by是登录用户?
要保存m2m关系,您还必须致电form.save_m2m()
!