kpsul/events/views.py

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import csv
from django.contrib.auth.decorators import login_required, permission_required
from django.http import HttpResponse
from django.shortcuts import get_object_or_404
from django.utils.text import slugify
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from events.models import Event, Registration
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@login_required
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@permission_required("events.view_event", raise_exception=True)
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def participants_csv(request, event_id):
event = get_object_or_404(Event, id=event_id)
# Create a CSV response
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filename = "{}-participants.csv".format(slugify(event.title))
response = HttpResponse(content_type="text/csv")
response["Content-Disposition"] = 'attachment; filename="{}"'.format(filename)
writer = csv.writer(response)
# The first line of the file is a header
header = ["username", "email", "prénom", "nom de famille"]
options_names = list(event.options.values_list("name", flat=True).order_by("id"))
header += options_names
extra_fields = list(
event.extra_fields.values_list("name", flat=True).order_by("id")
)
header += extra_fields
writer.writerow(header)
# Next, one line by registered user
registrations = Registration.objects.filter(event=event)
for registration in registrations:
user = registration.user
row = [user.username, user.email, user.first_name, user.last_name]
# Options
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all_choices = registration.options_choices.values_list("choice", flat=True)
options_choices = [
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" & ".join(all_choices.filter(option__id=id).order_by("id"))
for id in event.options.values_list("id", flat=True).order_by("id")
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]
row += options_choices
# Extra info
extra_info = list(
registration.extra_info.values_list("content", flat=True).order_by(
"field__id"
)
)
row += extra_info
writer.writerow(row)
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return response