#31710 closed Cleanup/optimization (fixed)
Added all files validation to the "Uploading multiple files" example.
Reported by: | nawaik | Owned by: | |
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Component: | Documentation | Version: | dev |
Severity: | Normal | Keywords: | |
Cc: | Simon Brulhart | Triage Stage: | Accepted |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description (last modified by )
When following the multiple files documentation:
https://docs.djangoproject.com/en/3.0/topics/http/file-uploads/#uploading-multiple-files
If you change:
file_field = forms.FileField(widget=forms.ClearableFileInput(attrs={'multiple': True}))
To:
file_field = forms.ImageField(widget=forms.ClearableFileInput(attrs={'multiple': True}))
The file input field looks like this:
<input type="file" name="file_field" multiple="" accept="image/*" required="" id="id_file_field">
If you do inspect element and remove accept="image/*" so it looks like this:
<input type="file" name="file_field" multiple="" required="" id="id_file_field">
If you then only add 1 .txt file everything works fine and you get an error:
"Upload a valid image. The file you uploaded was either not an image or a corrupted image."
However if you upload multiple .txt files or a mix of images and files nothing gets checked and you are able to upload .txt files in imagefields.
I tried this with a fresh project and was able to reproduce the problem.
This is how it looks in the sqlite db:
id image post_id 4 products/testnow_copy_2.txt 2
Code I used to recreate the problem:
Models.py
from django.db import models class Product(models.Model): title = models.CharField(max_length=50) class Images(models.Model): post = models.ForeignKey(Product, on_delete=models.CASCADE) image = models.ImageField(upload_to='products/') def __str__(self): return self.post.title
Forms.py
from django import forms from .models import Product class MultiPhotoForm(forms.ModelForm): file_field = forms.ImageField(widget=forms.ClearableFileInput(attrs={'multiple': True})) class Meta: model = Product fields = ['title']
Views.py
from django.shortcuts import render from .forms import MultiPhotoForm from .models import Images, Product def MultiUploadView(request): template_name = 'test.html' if request.method == "POST": form = MultiPhotoForm(request.POST or None, request.FILES or None) files = request.FILES.getlist('file_field') if form.is_valid(): title = form.cleaned_data['title'] product = Product.objects.create(title = title) for i in files: Images.objects.create(post=product,image=i) else: form = MultiPhotoForm() return render(request, template_name, {'form': form})
Change History (13)
comment:1 by , 4 years ago
Description: | modified (diff) |
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Version: | 3.0 → master |
comment:2 by , 4 years ago
Type: | Uncategorized → Bug |
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follow-up: 5 comment:3 by , 4 years ago
Component: | File uploads/storage → Documentation |
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Summary: | Multi upload with Imagefield allows non image files to be uploaded → Added all files validation to the "Uploading multiple files" example. |
Triage Stage: | Unreviewed → Accepted |
Type: | Bug → Cleanup/optimization |
comment:4 by , 4 years ago
Owner: | changed from | to
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Status: | new → assigned |
comment:5 by , 4 years ago
Replying to felixxm:
Uploading multiple files contains only a simple example how you can handle multiple files, it will validate only the first file. It's not a bug in
ImageField
because it doesn't support uploading multiple files.
I agree that we we could improve this example (
forms.py
) with adding all files validation.
Im thinking to add a note under the example regarding the all files validation,Is that Okay?
or how should i improve the forms.py example
comment:6 by , 4 years ago
Cc: | added |
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comment:7 by , 3 years ago
When I add a validator to the image form (using something like https://gist.github.com/mobula/da99e4db843b9ceb3a3f ), only the first image gets validated. I assume that is another consequence of the problem described above. This way, it is not possible to check if the uploaded images are not too big. For a developer who is using validators for multi image uploads, it is hard to detect that the code doesn't behave as expected.
Shouldn't this be reclassified as a bug?
Note that in the initial issue description, it is mentioned that when multiple files are uploaded, nothing is checked. When I add a validator to the form, the first file is validated by the validator. So I am not 100% this is the same issue.
comment:8 by , 2 years ago
Owner: | removed |
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Status: | assigned → new |
comment:13 by , 7 months ago
Related PR with docs clarifications: https://github.com/django/django/pull/18044
Merged in ba4ffdc8771c2f38cf6de26a2b82bbceea2b933a
Uploading multiple files contains only a simple example how you can handle multiple files, it will validate only the first file. It's not a bug in
ImageField
because it doesn't support uploading multiple files.I agree that we we could improve this example (
forms.py
) with adding all files validation.