Saving image fails without error in django model form - django

Question

I want to try to save an image to my model:
def user_directory_path(instance, filename):
# file will be uploaded to MEDIA_ROOT/user_<id>/<filename>
return 'user_{0}/{1}'.format(instance.user.id, filename)
class Leverandor(models.Model):
ID = models.AutoField(primary_key=True)
UserID = models.ForeignKey('Stamdata', on_delete=models.CASCADE)
Name = models.CharField('Name', max_length=200)
URL = models.URLField('URL', max_length=200)
ImageURL = models.ImageField('ImageURL',blank=True, null=True, upload_to=user_directory_path)
To this Form.py:
class EditLeverandorForm(forms.ModelForm):
Name = forms.CharField(widget=forms.TextInput(attrs={'class': 'form-control', 'autofocus': True}))
URL = forms.URLField(widget=forms.TextInput(attrs={'class': 'form-control', 'autofocus': True}))
ImageURL = forms.ImageField
class Meta:
model = Leverandor
labels = {
'Name' : 'Leverandør',
'URL' : 'Webside',
'ImageURL' : 'Logo',
}
fields = ['UserID', 'Name', 'URL', 'ImageURL']
And rendererd to this view.py
def add_leverandorer(request):
user_id = request.user.id
# if this is a POST request we need to process the form data
if request.method == 'POST':
print (user_id)
form = EditLeverandorForm(request.POST, request.FILES, instance=request.user)
if form.is_valid():
form.save()
return HttpResponseRedirect('/backend/leverandorer')
else:
print ('somethin goes wrong')
print (user_id)
form = EditLeverandorForm()
return render(
request,
'backend/add_leverandorer.html',
{
'title':'WestcoastShop - Backend',
'form': form,
}
)
The problem is that before I add the instance=request.user part its saves the entry correct but without image. Now I add the part from Django documentation like provided for save to an variable path but nothing happened after i click to save button.
<form action="/backend/leverandorer/add" method="post" enctype="multipart/form-data">
{% csrf_token %}
<div class="form-group">
<label for="simpleinput">Leverandør</label>
{{ form.Name }}
</div>
<div class="form-group">
<label for="simpleinput">Webside</label>
{{ form.URL }}
</div>
<div class="form-group">
<label for="simpleinput">Logo</label>
{{ form.ImageURL }}
<!--<input type="file" name="ImageURL" accept="image/*" required="" id="id_ImageURL" class="form-control-file">-->
</div>
<input type="hidden" id="UserID" name="UserID" value="{{ user.id }}">
<button type="submit" class="btn btn-primary">Gem</button>
</form>
I didnt see an error but now its not saving the form in models also if ImageField is empty.
regards
Christopher.

Answer 1

You are using UserID as a hidden field. The hidden field will not pass the form-validation. So your following code will be false.
if form.is_valid():
form.save()
return HttpResponseRedirect('/backend/leverandorer')
One of the solutions is, remove the UserID field from your template and update your view as follows.
if form.is_valid():
user_form = form.save(commit=False)
user_form.UserID = request.user
user_form.save()

Answer 2

I I change the function in models.py to:
def user_directory_path(instance, filename):
# file will be uploaded to MEDIA_ROOT/user_<id>/<filename>
return 'user_{0}/{1}'.format(instance.UserID, filename)
class Leverandor(models.Model):
ID = models.AutoField(primary_key=True)
UserID = models.ForeignKey('Stamdata', on_delete=models.CASCADE)
Name = models.CharField('Name', max_length=200)
URL = models.URLField('URL', max_length=200)
ImageURL = models.ImageField('ImageURL',blank=True, null=True, upload_to=user_directory_path)
its works, but the Path is Username and not user.id