问题描述
我想使用通用外键创建一个注释表单,但是在以表单的形式获取object_id和content_type的初始数据时遇到了麻烦?
class Comment(models.Model):
user = models.ForeignKey(User,on_delete=models.CASCADE)
content_type= models.ForeignKey(ContentType,on_delete=models.CASCADE)
object_id = models.PositiveIntegerField()
content_object= GenericForeignKey()
parent= models.ForeignKey("self",null=True,blank=True,on_delete=models.CASCADE)
content = RichTextField()
time_stamp = models.DateTimeField(auto_Now_add=True)
Forms.py
class CommentsForm(forms.ModelForm):
content_type = forms.CharField(widget=forms.HiddenInput)
object_id = forms.IntegerField(widget=forms.HiddenInput)
content = forms.CharField(widget=forms.Textarea(attrs={
'class':'form-control','cols':'4','rows':'3'
}))
class Meta:
model = Comment
fields = ['content','user','object_id','content_type']
Views.py
class SongDetail(FormMixin,DetailView):
model = Song
form_class = CommentsForm
def post(self,request,*args,**kwargs):
obj = self.get_object()
if not request.user.is_authenticated:
return redirect('music:obj.get_absolute_url()')
if form.is_valid():
form.save()
return self.form_valid(form)
解决方法
您可以尝试这样:
class SongDetail(ModelFormMixin,DetailView):
model = Song
form_class = CommentsForm
def get_initial(self):
obj = self.get_object()
return { 'content_type': obj.content_type,'object_id': obj.object_id }
def post(self,request,*args,**kwargs):
if not request.user.is_authenticated:
return redirect('music:obj.get_absolute_url()')
form = self.get_form()
if form.is_valid():
return self.form_valid(form)
else:
return self.form_invalid(form)
仅供参考,我使用的是ModelFormMixin
而不是FormMixin
,因为它提供了内置的保存功能。
在这里,我正在重写get_initial
方法以从中返回content_type
和object_id
。然后,这些值将被传递到表单并作为初始值加载。