Django form validation with FileField - django

Question

I am having some trouble getting a file to post via a form using generic class-based view CreateView. Below is what i have so far. I am not quite sure how to handle the file and if request.FILES is getting the file being posted or if there is something else i need to be doing to capture the file information in the form. I have tried following the docs, however no luck in getting something working. File uploads as a blank field.
views.py
# Create
class FileUploadCreateView(BSModalCreateView):
template_name = 'fileupload/create-file.html'
form_class = FileUploadModelForm
success_message = 'Success: File was uploaded.'
success_url = reverse_lazy('files_list')
# Add required field my_user prior to posting form
def form_valid(self, form):
form = FileUploadModelForm(self.request.POST, self.request.FILES)
self.object = form.save(commit=False)
self.object.my_user = self.request.user
self.object.file_status = 'ready'
return super().form_valid(form)
forms.py
class FileUploadModelForm(BSModalModelForm):
class Meta:
model = FileUpload
fields = ['file_name', 'file_description', 'file_date_from', 'file_date_to','file_upload']
widgets = {
'file_name': forms.TextInput(attrs={'class':'form-control mb-3', 'id':'ruleset_name'}),
'file_description': forms.Textarea(attrs={'rows':5}),
'file_date_from': DatePickerInput(
options={
"format": "MM/DD/YYYY",
"showClose": True,
"showClear": True,
"showTodayButton": True,
}
),
'file_date_to': DatePickerInput(
options={
"format": "MM/DD/YYYY",
"showClose": True,
"showClear": True,
"showTodayButton": True,
}
),
'file_upload': forms.FileInput(attrs={'class':'form-control-file mb-3', 'id':'file_upload', 'type':'file', }),
}
html
{% load widget_tweaks %}
<form method="post" action="" enctype="multipart/form-data">
{% csrf_token %}
<div class="modal-header">
<h5 class="modal-title" style="color:#7a7a7a;">
<i class="fas fa-plus-square fa-med pr-2 align-middle"></i>
<span class="align-middle">ADD File</span>
</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<div class="{% if form.non_field_errors %}invalid{% endif %} mb-2">
{% for error in form.non_field_errors %}
{{ error }}
{% endfor %}
</div>
{% for field in form %}
<div class="form-group">
<label for="{{ field.id_for_label }}" style="font-size: small; color:#7a7a7a;">{{ field.label }}</label>
{% render_field field class="form-control" %}
<div class="{% if field.errors %} invalid{% endif %}">
{% for error in field.errors %}
<p class="help-block">{{ error }}</p>
{% endfor %}
</div>
</div>
{% endfor %}
</div>
<div class="modal-footer">
<button type="button" class="btn btn-outline-secondary" data-dismiss="modal">Cancel</button>
<button type="button" class="submit-btn btn btn-primary pr-4 pl-4">Save</button>
</div>
</form>
model.py
class FileUpload(models.Model):
"""
Class for the creation of file uploads
"""
id = models.AutoField(primary_key=True)
my_user = models.ForeignKey('users.MyUser', on_delete=models.CASCADE, related_name='file_uploads', default=None)
file_name = models.CharField(max_length=255, blank=False, default=None, verbose_name='File Name')
file_description = models.CharField(max_length=255, blank=False, default=None, verbose_name='File Description')
file_date_from = models.DateField(default=None, null=True, blank=False, verbose_name='File Date From')
file_date_to = models.DateField(default=None, null=True, blank=False, verbose_name='File Date To')
STATUS_CHOICES = (
('ready','Ready'),
('processed', 'Processed'),
('archived','Archived'),
)
file_status = models.CharField(max_length=9, choices=STATUS_CHOICES, default=None, blank=False, verbose_name='File Status')
file_create_date = models.DateTimeField(verbose_name='File Create Date', auto_now_add=True)
file_upload = models.FileField(upload_to='uploads/%Y/%m/%d/', default=None, verbose_name='File Upload', blank=True)
class Meta:
ordering = ['-file_create_date']
constraints = [
models.UniqueConstraint(fields=['my_user','file_name'], name='Unique MyUser File')
]
def __str__(self):
return self.file_name

Answer 1

Pretty sure you forgot to add the enctype="multipart/form-data" data attribute to the form tag in your template.
To be sure, you would have to provide us with the Model, the Form and the template code.

Answer 2

after working on the view for some time, I was able to get the file to post via the following, using cleaned_data.
# Add required fields prior to posting form
def form_valid(self, form):
self.instance = form.save(commit=False)
self.instance.my_user = self.request.user
self.instance.file_status = 'ready'
self.instance.file_upload = form.cleaned_data['file_upload']
return super().form_valid(form)