Блог

 from django import forms
from .models import Tweet

MAX_TWEET_LENGTH=240

class TweetForm(forms.ModelForm):
    class meta:
        model = Tweet
        field = ['content']
def clean_content(self):
    content = self.cleaned_data.get('content')
    if len(content)>MAX_TWEET_LENGTH:
        raise forms.ValidationError("This tweet is to long")
    return content
 

Это мой код для формы …
но когда я вызываю форму твита в views.py там написано

 Exception Type: ValueError
Exception Value : ModelForm has no model class specified
                 
 

Я также пробовал в оболочке django : вот сообщение об ошибке

 ~AppDataLocalProgramsPythonPython37libsite-packagesdjangoformsmodels.py in __init__(self, data, files, auto_id, prefix, initial, error_class, label_suffix, empty_permitted, instance, use_required_attribute, renderer)
285         opts = self._meta
286         if opts.model is None:
> 287             raise ValueError('ModelForm has no model class specified.')
288         if instance is None:
289             # if we didn't get an instance, instantiate a new one

ValueError: ModelForm has no model class specified.
 

вот мой views.py

 def tweet_creat_view(request,*args,**kwargs):
    form = TweetForm(request.POST or None)
    if form.is_valid():
        obj = form.save(commit=False)
        obj.save()
        form = TweetForm()
    return render(request,"components/forms.html",context={"form":form})