If you have a Django forms.Form with two or more fields to validate that require information from each other you can test these in the forms' clean method.
However, if you need to test a condition that relies upon normal form data in addition to uploaded file data, the code below will let you do so:
forms.py
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24 | """Allows checking of form POST data as well as uploaded files when validating
a standard Django `forms.Form`.
The short version is that you check `Form().files` in the `clean()` method,
assuming the form has been bound to the request.
"""
from django import forms
class BannerUploadForm(forms.Form):
banner = forms.FileField()
placeholder_text = forms.CharField()
def clean(self):
cleaned_data = super(BannerUploadForm, self).clean()
text = cleaned_data.get('placeholder_text')
if not text and not 'banner' in self.files:
raise forms.ValidationError('Please upload a banner image or '
'add placeholder text.')
return cleaned_data
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upload.html
| {% extends 'base.html' %}
{% block content %}
<form method="post" action="{% url upload-banner %}" enctype="multipart/form-data">{% csrf_token %}
{{ form.as_p }}
<input type="submit" value="Upload">
</form>
{% endblock content %}
|
urls.py
| url(r'^banner/upload/$', 'banners.views.upload_banner', name='upload-banner')
|
views.py
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22 | from django.shortcuts import render
from .forms import BannerUploadForm
def upload_banner(request):
template_name = 'banners/upload.html'
context = {}
if request.method == 'POST':
# request.FILES must be bound to form else form.files will be empty
form = BannerUploadForm(request.POST, request.FILES)
if form.is_valid():
# your handler here
template_name = 'banners/success.html'
else:
form = BannerUploadForm()
context['form'] = form
return render(request, template_name, context)
|