Split the list view code up in three pieces
1. getListContents which returns the required contents dictionary
2. _list which returns the response for a specified list of contents
3. list which constructs just one content dict and passes it to _list
This way it is easier to do step 1 and 2 in other code than list(),
which makes it possible to display multiple list pages (by calling
getListContents multiple times and passing the result to _list).
from django.core.management.base import BaseCommand, CommandError
from django.core import serializers
from optparse import make_option
class Command(BaseCommand):
option_list = BaseCommand.option_list + (
make_option('--format', default='json', dest='format',
help='Specifies the output serialization format for fixtures.'),
make_option('--indent', default=None, dest='indent', type='int',
help='Specifies the indent level to use when pretty-printing output'),
make_option('-e', '--exclude', dest='exclude',action='append', default=[],
help='App to exclude (use multiple --exclude to exclude multiple apps).'),
)
help = 'Output the contents of the database as a fixture of the given format.'
args = '[appname ...]'
def handle(self, *app_labels, **options):
from django.db.models import get_app, get_apps, get_models
format = options.get('format','json')
indent = options.get('indent',None)
exclude = options.get('exclude',[])
show_traceback = options.get('traceback', False)
excluded_apps = [get_app(app_label) for app_label in exclude]
if len(app_labels) == 0:
app_list = [app for app in get_apps() if app not in excluded_apps]
else:
app_list = [get_app(app_label) for app_label in app_labels]
# Check that the serialization format exists; this is a shortcut to
# avoid collating all the objects and _then_ failing.
if format not in serializers.get_public_serializer_formats():
raise CommandError("Unknown serialization format: %s" % format)
try:
serializers.get_serializer(format)
except KeyError:
raise CommandError("Unknown serialization format: %s" % format)
objects = []
for app in app_list:
for model in get_models(app):
objects.extend(model._default_manager.all())
try:
return serializers.serialize(format, objects, indent=indent)
except Exception, e:
if show_traceback:
raise
raise CommandError("Unable to serialize database: %s" % e)