Before I can write validation of uploaded images, I first need to know
how to save multiple upload images in view. Can anyone share some code
or reference on this? Thanks.
On Dec 20, 10:31 pm, Brandon Taylor <btaylordes...@gmail.com> wrote:
> 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 <cba...@gmail.com> 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 But it reads: "This post is outdated now - if you’re using the latest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.- Hide quoted text -
>
> - Show quoted text -
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