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File upload error in Django
Hello,
I'm trying to figure out why I'm having problems with file upload in Django... I made sure to create the directory and also made sure it has the appropriate permissions. This is working on my local machine; but failing with "Bad Request (400)" when I'm running it on OpenShift. I did get it working once, but it stopped working after that and I can't figure it out; I would greatly appreciate a second set of eyes.
The File module code:
Variables in the settings file:
Value of $OPENSHIFT_DATA_DIR:
echo $OPENSHIFT_DATA_DIR
/var/lib/openshift/5521fe5
Output of the makemigrations command:
I've been working at this for a while, and I can't figure out why this isn't working... I would greatly appreciate any information in resolving this error.
I'm trying to figure out why I'm having problems with file upload in Django... I made sure to create the directory and also made sure it has the appropriate permissions. This is working on my local machine; but failing with "Bad Request (400)" when I'm running it on OpenShift. I did get it working once, but it stopped working after that and I can't figure it out; I would greatly appreciate a second set of eyes.
The File module code:
from django.db import models
from django.dispatch import receiver
from BAGCA.settings import MEDIA_ROOT_FILES
class Files(models.Model):
class Meta:
verbose_name_plural = "Files"
def __str__(self):
return u'%s' % self.filename
filename = models.CharField(max_length=100)
file = models.FileField(upload_to=MEDIA_ROOT_FILES)
# These two auto-delete files from filesystem when they are unneeded:
@receiver(models.signals.post_delete, sender=Files)
def auto_delete_file_on_delete(sender, instance, **kwargs):
"""Deletes file from filesystem
when corresponding `Files` object is deleted.
"""
if instance.file:
if os.path.isfile(instance.file.path):
os.remove(instance.file.path)
@receiver(models.signals.pre_save, sender=Files)
def auto_delete_file_on_change(sender, instance, **kwargs):
"""Deletes file from filesystem
when corresponding `Files` object is changed.
"""
if not instance.pk:
return False
try:
old_file = Files.objects.get(pk=instance.pk).file
if not old_file:
return False
except Files.DoesNotExist:
return False
new_file = instance.file
if not old_file == new_file:
if os.path.isfile(old_file.path):
os.remove(old_file.path)
Variables in the settings file:
MEDIA_ROOT = os.path.join(os.path.dirname(__file__), 'media')
MEDIA_ROOT_FILES = os.path.join(os.environ['OPENSHIFT_DATA_DIR'], 'USER_UPLOADED_FILES')
MEDIA_URL = '/media/'
Value of $OPENSHIFT_DATA_DIR:
echo $OPENSHIFT_DATA_DIR
/var/lib/openshift/5521fe5
Output of the makemigrations command:
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models, migrations
class Migration(migrations.Migration):
dependencies = [
]
operations = [
migrations.CreateModel(
name='Files',
fields=[
('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
('filename', models.CharField(max_length=200)),
('file', models.FileField(upload_to=b'/var/lib/openshift/5521fe5afcf9334c7600019a/app-root/data/')),
],
options={
},
bases=(models.Model,),
),
]
I've been working at this for a while, and I can't figure out why this isn't working... I would greatly appreciate any information in resolving this error.
PythonWeb FrameworksWeb DevelopmentWeb Languages and StandardsAJAX
Last Comment
Errang Genevre
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ASKER
Hm... I think I've been following an outdated tutorial.
It told me to start a "Python" cartridge on OpenShift; and run Django through there.
But, OpenShift now has a "Django" cartridge; includes a nice demo; started a "file_upload" module there and I'm able to upload files.
Doesn't actually solve the problem; but this is a better alternative.
I am still curious why the file upload didn't work in a Python environment...
It told me to start a "Python" cartridge on OpenShift; and run Django through there.
But, OpenShift now has a "Django" cartridge; includes a nice demo; started a "file_upload" module there and I'm able to upload files.
Doesn't actually solve the problem; but this is a better alternative.
I am still curious why the file upload didn't work in a Python environment...
ASKER
This is ridiculous... when I integrate the "File Upload" module with the rest of the application; it stops working...
I'm using the same file path, and everything...
This method works:
This method:
- Reads in a file from a file input form
- Writes the file to a directory on the system
- Reads the file back in and inserts data into a database
- Deletes the file
Its a little crazy that my method works; but Django's built in functionality fails...
I know better than to place the blame on Django; but I can't figure out what's going on.
I'm using the same file path, and everything...
This method works:
def create_quiz_form(request):
if request.method == 'POST':
form = UploadQuizData(request.POST, request.FILES)
if form.is_valid():
filename = "temporary_file.txt"
fd = open('%s/%s' % (MEDIA_ROOT_FILES, filename), 'wb')
group = request.POST['group_choices']
quiz_name = request.POST['quiz_name']
trainer = request.POST['trainer']
quiz_description = request.POST['quiz_description']
course_code = request.POST['course_code']
due_date = request.POST['due_date']
duration_hours = request.POST['duration_hours']
required_score = request.POST['required_score']
determine_if_quiz_exists = Quiz.objects.filter(quiz_name=quiz_name)
if not determine_if_quiz_exists:
create_quiz = Quiz(quiz_name=quiz_name,
quiz_description=quiz_description,
trainer=trainer,
course_code=course_code,
due_date=due_date,
duration_hours=duration_hours,
required_score=required_score)
create_quiz.save()
create_quiz.groups.add(group)
quiz_id = Quiz.objects.get(quiz_name=quiz_name)
for line in request.FILES['file'].read():
fd.write(line)
fd.close()
written_file = open(MEDIA_ROOT_FILES + '/temporary_file.txt', 'r')
for line in written_file:
parts = re.split(r'\t', line)
create_question = Question(quiz=quiz_id, question_text=parts[0])
create_question.save()
for part_counter in range(1, len(parts)):
is_answer = False
parts[part_counter] = parts[part_counter].strip()
if parts[part_counter][0] == '(' and \
parts[part_counter][len(parts[part_counter]) - 1] == ')':
parts[part_counter] = parts[part_counter][1:len(parts[part_counter]) - 1]
is_answer = True
create_choice = Choice(question=Question.objects.get(pk=create_question.id),
choice_text=parts[part_counter].strip(), answer=is_answer)
create_choice.save()
fd.close()
os.remove(MEDIA_ROOT_FILES + '/temporary_file.txt')
form = UploadQuizData()
data = {'form': form}
return render(request, 'create_quiz_form.html', data)
else:
form = UploadQuizData()
data = {'form': form}
return render(request, 'create_quiz_form.html', data)
This method:
- Reads in a file from a file input form
- Writes the file to a directory on the system
- Reads the file back in and inserts data into a database
- Deletes the file
Its a little crazy that my method works; but Django's built in functionality fails...
I know better than to place the blame on Django; but I can't figure out what's going on.
ASKER CERTIFIED SOLUTION
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Glad you found it.
It is still strange, that you found nowhere trace logfiles etc. to indicate this.
True in my personal projects all my data was below MEDIA_ROOT, that's why I never enncountered this issue
It is still strange, that you found nowhere trace logfiles etc. to indicate this.
True in my personal projects all my data was below MEDIA_ROOT, that's why I never enncountered this issue
ASKER
Yea, there was a python.log file; but all it had was an entry that a 400 response has been sent.
And yea, I didn't want to put it under MEDIA_ROOT because it was under version control and didn't want the files to be overwritten.
And yea, I didn't want to put it under MEDIA_ROOT because it was under version control and didn't want the files to be overwritten.
ah I see.
In my projects mediaroot was always empty.
What you could do (not sure it makes sense for ypour project)
have your version controlled files in one directory and either copy (or symlink) them during server installation.
In my projects mediaroot was always empty.
What you could do (not sure it makes sense for ypour project)
have your version controlled files in one directory and either copy (or symlink) them during server installation.
ASKER
These are user upload files; and they would also have to be able to delete it.
I would have to potentially save 100s of files, and restore them; and also integrate Django's file storage with git.
I would have to potentially save 100s of files, and restore them; and also integrate Django's file storage with git.
ASKER
I didn't receive a response from anyone else.
And my files are a few kb; nothing gigantic