def page_export_pdf(request, config_id):
config = get_object_or_404(Configuration, pk=config_id)
if request.method == "GET":
return {'config': config}
log_filename = request.POST.get("key")
assert (log_filename and os.sep not in log_filename
and log_filename.isalnum()) # lazy security checking
log_filename = os.path.join(tempfile.gettempdir(),
log_filename + ".log")
data_source = request.POST.get("data_source")
logger = open(log_filename, 'w')
print >> logger, "Fetching data from source.."
logger.flush()
from zope.dottedname.resolve import resolve
queryset = resolve(settings.PDFBUILDER_DATA_SOURCE)(request, data_source)
entry_count_upper_bound = queryset.count()
order_by = registry.get_ordering(config.order_by())
if order_by is not None:
queryset = queryset.order_by(*order_by)
group_by = registry.get_grouping(config.group_by())
#filter_by = config.filter_by()
## FIXME: this is ugly
#def fixer(queryset, filter_by):
# for item in queryset:
# omit = False
# for field in filter_by:
# if getattr(item, field)() is None:
# omit = True
# break
# if omit is True:
# continue
# yield item
#queryset = fixer(queryset, filter_by)
template = registry.get_template(config.template())
def log_callback(prepared_flowables):
count = 0
for name, bucket in prepared_flowables.items():
count += len(bucket)
if count % 500:
return
print >> logger, "%s / %s" % (count, entry_count_upper_bound)
logger.flush()
try:
grouped_elements = template.generate_flowables(
queryset,
number_entries=config.number_entries(),
bucket_selector=group_by,
log_callback=log_callback)
except Exception, e:
print >> logger, pprint.pformat(sys.exc_info())
logger.flush()
raise
def load_template(self):
from pdfbuilder import registry
return registry.get_template(self.template())