如何解决如何使用 django ModelForm 以初始值提供请求的用户并在 django admin 中分配表单
我想用 ModelForm 和通用 CreateView 创建文章,而不选择我的用户作为作者。作者应该是被请求的用户。 我知道它可以通过多种方式解决,但我想用我可以在任何地方使用的表单(django-admin 和视图)来解决它。
到目前为止,我已经尝试过:
models.py
class Article(TimeStampedModel):
...
author = models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.CASCADE)
content = RichTextUploadingField(config_name='default')
status = models.CharField(max_length=10,choices=STATUS_CHOICES,default='draft')
...
forms.py
class ArticleCreateForm(forms.ModelForm):
class Meta:
model = Article
fields = [
'title','featured_image','content','status'
]
author = forms.IntegerField(widget=forms.HiddenInput)
def __init__(self,*args,**kwargs):
super().__init__(*args,**kwargs)
user_field = kwargs.get('instance')
self.fields['author'].initial = user_field.id
views.py
class ArticleCreate(CreateView):
form_class = ArticleCreateForm
template_name = 'articles/article_form.html'
def get(self,request,**kwargs):
form = self.form_class(instance=request.user)
return render(request,self.template_name,{'form': form})
def form_valid(self,form):
return super().form_valid(form)
def form_invalid(self,form):
return HttpResponse(str(form.errors))
它呈现表单,但不是保存文章,而是抛出此错误:
File "/home/tareq/Desktop/PERSONAL/Blog/blog/blog/articles/forms.py",line 19,in __init__
self.fields['author'].initial = user_field.id
AttributeError: 'NoneType' object has no attribute 'id'
ERROR 2021-01-23 00:58:31,533 log 85374 140159710901824 Internal Server Error: /new/
Traceback (most recent call last):
File "/home/tareq/.local/share/virtualenvs/Blog-i5phkViF/lib/python3.8/site-packages/django/core/handlers/exception.py",line 34,in inner
response = get_response(request)
File "/home/tareq/.local/share/virtualenvs/Blog-i5phkViF/lib/python3.8/site-packages/django/core/handlers/base.py",line 115,in _get_response
response = self.process_exception_by_middleware(e,request)
File "/home/tareq/.local/share/virtualenvs/Blog-i5phkViF/lib/python3.8/site-packages/django/core/handlers/base.py",line 113,in _get_response
response = wrapped_callback(request,*callback_args,**callback_kwargs)
File "/home/tareq/.pyenv/versions/3.8.0/lib/python3.8/contextlib.py",line 75,in inner
return func(*args,**kwds)
File "/home/tareq/.local/share/virtualenvs/Blog-i5phkViF/lib/python3.8/site-packages/django/views/generic/base.py",line 71,in view
return self.dispatch(request,**kwargs)
File "/home/tareq/.local/share/virtualenvs/Blog-i5phkViF/lib/python3.8/site-packages/django/views/generic/base.py",line 97,in dispatch
return handler(request,**kwargs)
File "/home/tareq/.local/share/virtualenvs/Blog-i5phkViF/lib/python3.8/site-packages/django/views/generic/edit.py",line 172,in post
return super().post(request,line 140,in post
form = self.get_form()
File "/home/tareq/.local/share/virtualenvs/Blog-i5phkViF/lib/python3.8/site-packages/django/views/generic/edit.py",line 33,in get_form
return form_class(**self.get_form_kwargs())
File "/home/tareq/Desktop/PERSONAL/Blog/blog/blog/articles/forms.py",in __init__
self.fields['author'].initial = user_field.id
AttributeError: 'NoneType' object has no attribute 'id'
解决方法
您似乎缺少在提交表单时实际获取用户 ID 的逻辑。如果您查看此文档,您将看到您需要引用请求对象来获取用户信息并让视图逻辑将 request.user_id 分配给新实例。
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