Hi,
You can do validation on images by using a custom form for your admin
Model. This example validates that a thumbnail image is a specific
dimension, file type and file size,
from django.core.files.images import get_image_dimensions
class MyModelAdminForm(forms.ModelForm):
model = MyModel
def clean_thumbnail(self):
thumbnail_image = self.cleaned_data['thumbnail']
try:
main, sub = thumbnail_image.content_type.split('/')
w, h = get_image_dimensions(thumbnail_image)
if w != 128 or h != 96:
raise forms.ValidationError(u'Please use an image that
is 128 x 96 pixels for thumbnails')
if not (main == 'image' and sub in ['jpeg', 'pjpeg']):
raise forms.ValidationError(u'Please use a JPEG
image.')
if len(thumbnail_image) > 20480: #bytes
raise forms.ValidationError(u'Thumbnail file size must
not exceed 20 KB.')
except AttributeError:
pass
return thumbnail_image
class MyModelAdmin(admin.ModelAdmin):
form = MyModelAdminForm
HTH,
Brandon
On Dec 20, 8:00 pm, Chuck22 <[email protected]> wrote:
> Here is my model:
>
> class Book(models.Model):
> title = models.CharField(max_length=150)
> category = models.CharField(max_length=50)
> description = models.CharField(max_length=2000)
> image1 = models.ImageField(upload_to='img/bk', blank=True)
> image2 = models.ImageField(upload_to='img/bk', blank=True)
> image3 = models.ImageField(upload_to='img/bk', blank=True)
>
> I want to create a form to add/edit a book which can upload image
> files (I want to make sure it is an image file and individual image
> file is within size limit, e.g. 500kb, and dimension limit, e.g.
> 800X600 px).
>
> I don't think I can use ModelForm because this validation requirement,
> also because I want to automatically set the category value for the
> form on the fly. But don't know 1) how to save uploaded images in view
> along with the new Model object. 2) how to do validation on the
> uploaded image files.
>
> I found a close reference:
>
> http://www.oluyede.org/blog/2007/03/18/django-image-uploading-validat...
>
> But it reads: "This post is outdated now - if you’re using the latest
> django, do not follow this post." I don't know what to follow for
> Django 1.0.2 that I am using. The Django document on
> forms:http://docs.djangoproject.com/en/dev/topics/forms/
> does not even mention how to ceate a form for ImageField in Model. Can
> anyone help with some code snippets? Thanks.
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