I am trying to build an admin action 'download_selected' which will download selected models. When the action is selected, I redirect to an intermediate page so that users can select a download format. When a user selects a download format and clicks on 'download', it downloads the file. But stays on the same intermediate page. How do I redirect it back to change form admin page? This redirection that I want is similar to django 'download selected file' default admin action. Thanks.
Here is my code.
admin.py
class SelectDownloadFormatForm(forms.Form):
DOWNLOAD_TYPE_CHOICES=[('csv','csv'),
('json', 'json'),
('xml','xml')]
_selected_action = forms.CharField(widget=forms.MultipleHiddenInput)
download_type = forms.ChoiceField(label=_('Select a Download type'), choices=DOWNLOAD_TYPE_CHOICES, widget=forms.RadioSelect())
def download_selected(self, request, queryset):
import csv
from django.http import HttpResponse, HttpResponseRedirect
import StringIO
form = None
if 'download' in request.POST:
form = self.SelectDownloadFormatForm(request.POST)
if form.is_valid():
dtype = form.cleaned_data['download_type']
print dtype
response = HttpResponse(content_type='text/csv')
response['Content-Disposition'] = 'attachment; filename="export.csv"'
writer = csv.writer(response)
writer.writerow(['id', 'name', 'qid' ,'label', 'name', 'field'])
count = 0
for s in queryset:
questions_query = ParentModel.objects.filter(parent_form_id = s.id)
for q in questions_query:
writer.writerow([s.id, s.name, q.id, q.label, q.name, q.field])
count += 1
plural = ''
if count != 1:
plural = 's'
self.message_user(request, "Successfully downloaded %d survey response%s in %s format" % (count, plural, dtype))
return response
if not form:
form = self.SelectDownloadFormatForm(initial={'_selected_action': request.POST.getlist(admin.ACTION_CHECKBOX_NAME)})
return render(request,'admin/download_type.html', {'items': queryset,
'download_type_form': form,
})
download_selected.short_description = "Download selected forms"
download_type.html
{% extends "admin/base_site.html" %}
{% block content %}
<form action="" method="post">
{% csrf_token %}
{{ download_type_form }}
<p>Following survey will be downloaded with corresponding responses:</p>
<ul>{{ items|unordered_list }}</ul>
<input type="hidden" name="action" value="download_selected" />
<input type="submit" name="download" value="Download" />
</form>
{% endblock %}