Save model with many-to-many field using CreateView

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Save model with many-to-many field using CreateView

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I have the following problem I have two models one Themes and another Videos have a relationship much to many already that a video can deal with different topics, the problem is that when saving a video I do not give any error and I am saved but without the themes chosen with a CheckboxSelectMultiple, besides that the topics field does not validate me and I am declaring it required in the form, the strangest thing is that using the Django admin if all the fields including the Many-to-Many are stored

Model.py

class Tema(models.Model):
nombre = models.CharField(max_length=100)
color = models.CharField(max_length=7, default='#007bff')

def __str__(self):
    return self.nombre

def get_html_badge(self):
    name = escape(self.nombre)
    color = escape(self.color)
    html = '<span class="badge badge-primary" style="background-color: %s">%s</span>' % (color, name)
    return mark_safe(html)



class Video(models.Model):
nombre = models.CharField(max_length=100)
dueño = models.ForeignKey(User, on_delete=models.CASCADE, related_name='videos')
docfile = models.FileField(upload_to='video/%Y/%m/%d')
descripcion = models.CharField(max_length=500)
tema = models.ManyToManyField(Tema, related_name='video_tema',blank=False)

def __str__(self):
    return '%s ' % (self.nombre)

View.py

class VideoCreateView(CreateView):
model = Video
form_class = VideoAdd

template_name = 'Lab/video_add_form.html'

def form_valid(self, form):
    video = form.save(commit=False)
    video.dueño = self.request.user

    video.save()
    messages.info(self.request, 'El video fue añadido satisfactoriamente')
    return redirect('add_video')

forms.py

class VideoAdd(forms.ModelForm):
tema = forms.ModelMultipleChoiceField(
    queryset=Tema.objects.all(),
    widget=forms.CheckboxSelectMultiple(),
    required=True,
   )

class Meta:
    model = Video
    fields = ('docfile', "nombre", 'descripcion','tema')

python python-3.x django django-forms

asked by Pedro Diaz Labiste 16.05.2018 в 04:23

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1 answer

How do I make the axes not reversed unity Exclude domains and file types with wget

score 0 · Answer 1

The problem is in the form. Since you have the class VideoAdd you are overwriting the subject variable and replacing it with the variable you have created. The easiest way to overwrite Django's way of showing fields is by using the variable widgets = {'campo': forms.TipoCampo()}

This way, your ModelForm class would look like this:

class VideoAdd(forms.ModelForm):

class Meta:
    model = Video
    fields = ('docfile', "nombre", 'descripcion','tema')    
    widgets = {
        'tema': forms.CheckboxSelectMultiple(),
    }