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107 lines
3.3 KiB
Python
107 lines
3.3 KiB
Python
import csv
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import codecs
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from django.core.exceptions import ImproperlyConfigured
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from django.http import HttpResponse
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from django.views.generic.list import MultipleObjectMixin
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from eve_api.views.utils import DiggPaginator
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class CSVResponseMixin(object):
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def get_csv_headers(self):
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self.data = self.get_csv_data()
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if not len(self.data):
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raise ImproperlyConfigured("No data returned, so we're unable to create the header row")
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return [x for x in self.data[0].keys()]
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def get_csv_data(self):
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return getattr(self, 'csv_data', [])
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def get_dialect(self):
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return getattr(self, 'dialect', csv.excel)
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def get_charset(self):
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charset = getattr(self, 'charset', 'windows-1252')
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try:
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codecs.lookup(charset)
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except LookupError:
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raise ImproperlyConfigured("Invalid output characterset (%s) provided" % charset)
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return charset
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def get_filename(self):
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return getattr(self, 'csv_filename', 'output.csv')
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def get(self, request, *args, **kwargs):
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# Initial setup
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charset = self.get_charset()
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response = HttpResponse(mimetype='text/csv; charset=%s' % charset)
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response['Content-Disposition'] = 'attachment; filename=%s' % self.get_filename()
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w = csv.writer(response, self.get_dialect())
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# Headings
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headings = [unicode(c).encode(charset, 'replace') for c in self.get_csv_headers()]
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w.writerow(headings)
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# Rows
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for row in self.get_csv_data():
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row = [unicode(c).encode(charset, 'replace') for c in row]
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w.writerow(row)
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# Done
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return response
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class MultipleObjectCSVResponseMixin(CSVResponseMixin, MultipleObjectMixin):
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def get_filename(self):
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return '%s.csv' % self.model.__name__
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def get_csv_data(self):
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return self.queryset.all().values()
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class DetailPaginationMixin(object):
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detail_queryset_name = 'qs'
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def paginate_queryset(self, queryset, page_size):
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"""
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Paginate the queryset, if needed.
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"""
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paginator = DiggPaginator(queryset, page_size, body=10, tail=1)
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page = self.kwargs.get('page') or self.request.GET.get('page') or 1
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try:
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page_number = int(page)
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except ValueError:
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if page == 'last':
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page_number = paginator.num_pages
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else:
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raise Http404(_(u"Page is not 'last', nor can it be converted to an int."))
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try:
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page = paginator.page(page_number)
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return (paginator, page, page.object_list, page.has_other_pages())
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except InvalidPage:
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raise Http404(_(u'Invalid page (%(page_number)s)') % {
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'page_number': page_number
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})
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def get_pagination_queryset(self):
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return None
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def get_context_data(self, **kwargs):
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ctx = super(DetailPaginationMixin, self).get_context_data(**kwargs)
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qs = self.get_pagination_queryset()
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paginator, page, queryset, is_paginated = self.paginate_queryset(qs, 25)
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ctx.update({
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'paginator': paginator,
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'page_obj': page,
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'is_paginated': is_paginated,
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self.detail_queryset_name: queryset,
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})
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return ctx
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