How to save an imagefield in Django views? Not a modelform - django

Question

Im trying to submit a form with some textfields and an imagefield. And save it as a new model object. Cant get it to work so im going over each part from the start now..
How do i handle (just saving it) the imagefield in my views? Do i need to write an extra handler? It's not a modelform but a regular form. Where does PIL/PIllow come into this. Should I import it? Can i clean the imagefield?
I've been trying this:
def UploadThis(request):
if request.method == 'POST':
form = TestForm(request.POST, request.FILES)
response = {}
if form.is_valid():
response["status"] = "OK"
justtesting = Newmodel()
cd = form.cleaned_data
justtesting.name = cd['name']
justtesting.type = cd['type']
justtesting.description = cd['description']
justtesting.picture = request.FILES['picture']
justtesting.save()
Model:
class Newmodel(models.Model):
name = models.CharField(max_length=50)
type = models.CharField(max_length=50)
description = models.CharField(max_length=140, blank=True)
picture = models.ImageField(upload_to='images/testfiles', blank=True)
def __unicode__(self):
return self.name
Form:
class TestForm(forms.Form):
name = forms.CharField(max_length=50)
type = forms.CharField(max_length=50)
description = forms.CharField(max_length=140)
picture = forms.ImageField()
def clean(self):
cleaned_data = self.cleaned_data
name = cleaned_data.get("name")
description = cleaned_data.get("description")
type = cleaned_data.get("type")
return cleaned_data

Answer 1

Your error is that you are trying to assign the image to the model field using request.POST, when you actually need to use form.cleaned_data like so:
justtesting.picture = form.cleaned_data['picture']
Your clean method on the form is not doing anything currently. You could do validation (although that is not neccessary) by using a clean method something like this:
def clean_image(self):
image = self.cleaned_data.get('image', None)
if image:
# do some validation, if it fails
raise forms.ValidationError(u'Form error')
return image
For an example that validates the image size see this question: https://stackoverflow.com/a/16425455/1744645
Using PIL/Pillow is not necessary and only required if you want to some form of image processing. You could have a save method on your model, for example to resize the image:
def save(self,force_insert=False, force_update=False, *args, **kwargs):
# save everything else
super(Newmodel, self).save(force_insert, force_update)
if self.image:
if self.image.width > 300 or self.image.height > 300:
resize_image(self.image)
PIL/Pillow itself has the following basic operations that might be of interest:
img = PIL.open(PATH_TO_IMAGE)
img = img.resize((x, y), PIL.ANTIALIAS)
img = img.crop((0, 0, x, y))
img.save(path,quality=90)
But see http://effbot.org/imagingbook/pil-index.htm for the full docs.