I try to import some users from a csv file. I’m using the import-export module into the original User model. If I upload the file that I made it imports one user but with blank fields except date_joined, is_staff, is_active, is_superuser . The other fields like username, password, first and last name are empty.
What am I doing wrong?
views.py
from tablib import Dataset
from .resources import UserResource
def simple_upload(request):
if request.method == 'POST':
person_resource = UserResource()
dataset = Dataset()
new_users = request.FILES['myfile']
imported_data = dataset.load(new_users.read().decode(), format='csv', headers=False)
result = person_resource.import_data(dataset, dry_run=True) # Test the data import
if not result.has_errors():
person_resource.import_data(dataset, dry_run=False) # Actually import now
return render(request, 'stressz/simple_upload.html')
resources.py
from import_export import resources
from django.contrib.auth.models import User
class UserResource(resources.ModelResource):
class Meta:
model = User
This file doesn’t have a header line, nor do I see anything in your code assigning the columns to fields. Where are you defining how the fields in the CSV get assigned to the model fields?
You’ve got semicolons separating the fields and not commas.
The fields in the CSV are defined by that header row. That’s how the library can figure out which field in each row is to be assigned to a field in the model.
However, in your dataset.load statement, you should be able to use the delimiter= parameter to specify what character separates the fields - in this case delimiter=';' (It’s a very useful feature when you’re loading data generated from other sources.
Also, if you’re working with a source of data that doesn’t/can’t provide a header file, see Customize resource options for how to specify what fields are in a file and the order in which they appear.
Can I have one more question?
I made some changes on my views like the code below. I experience that if just two users in my csv, it imports the users well but if more it works not. The second problem is that every time it makes a blank user. I know this is because my request.POST.get script has a " " part but if it does not have this part it gives me a unique constraint failed message.
def simple_upload(request):
if request.method == 'POST':
username = request.POST.get('username', "")
first_name = request.POST.get('first_name', "")
last_name = request.POST.get('last_name', "")
email = request.POST.get('email', "")
user = User(username=username, first_name=first_name, last_name=last_name, email=email )
user.save()
person_resource = UserResource()
dataset = Dataset()
new_users = request.FILES['myfile']
imported_data = dataset.load(new_users.read().decode('utf-8'), format='csv', headers=True)
result = person_resource.import_data(imported_data, dry_run=True) # Test the data import
if not result.has_errors():
person_resource.import_data(dataset, dry_run=False) # Actually import now
return render(request, 'stressz/simple_upload.html')
When the user does not supply the username and/or email, what do you want the system to do? Once you answer that question, you can implement that as logic in an if statement to avoid creating the user in that case. You can also look into using a model form.
Another thing to keep in mind is what do you want to happen when there is a valid duplicate user being sent across? Should it error, update the user or ignore the data in the request?
I unfortunately overwrited the file before and uploaded the overwrited one. This is the good link:
