84 lines
3.5 KiB
Python
84 lines
3.5 KiB
Python
from django.core.exceptions import ImproperlyConfigured
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from django.core.management.base import BaseCommand, CommandError
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from django.core import serializers
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from django.utils.datastructures import SortedDict
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from optparse import make_option
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class Command(BaseCommand):
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option_list = BaseCommand.option_list + (
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make_option('--format', default='json', dest='format',
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help='Specifies the output serialization format for fixtures.'),
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make_option('--indent', default=None, dest='indent', type='int',
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help='Specifies the indent level to use when pretty-printing output'),
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make_option('-e', '--exclude', dest='exclude',action='append', default=[],
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help='App to exclude (use multiple --exclude to exclude multiple apps).'),
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)
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help = 'Output the contents of the database as a fixture of the given format.'
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args = '[appname ...]'
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def handle(self, *app_labels, **options):
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from django.db.models import get_app, get_apps, get_models, get_model
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format = options.get('format','json')
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indent = options.get('indent',None)
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exclude = options.get('exclude',[])
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show_traceback = options.get('traceback', False)
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excluded_apps = [get_app(app_label) for app_label in exclude]
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if len(app_labels) == 0:
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app_list = SortedDict([(app, None) for app in get_apps() if app not in excluded_apps])
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else:
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app_list = SortedDict()
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for label in app_labels:
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try:
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app_label, model_label = label.split('.')
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try:
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app = get_app(app_label)
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except ImproperlyConfigured:
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raise CommandError("Unknown application: %s" % app_label)
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model = get_model(app_label, model_label)
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if model is None:
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raise CommandError("Unknown model: %s.%s" % (app_label, model_label))
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if app in app_list.keys():
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if app_list[app] and model not in app_list[app]:
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app_list[app].append(model)
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else:
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app_list[app] = [model]
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except ValueError:
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# This is just an app - no model qualifier
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app_label = label
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try:
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app = get_app(app_label)
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except ImproperlyConfigured:
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raise CommandError("Unknown application: %s" % app_label)
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app_list[app] = None
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# Check that the serialization format exists; this is a shortcut to
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# avoid collating all the objects and _then_ failing.
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if format not in serializers.get_public_serializer_formats():
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raise CommandError("Unknown serialization format: %s" % format)
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try:
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serializers.get_serializer(format)
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except KeyError:
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raise CommandError("Unknown serialization format: %s" % format)
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objects = []
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for app, model_list in app_list.items():
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if model_list is None:
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model_list = get_models(app)
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for model in model_list:
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objects.extend(model.objects.all())
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try:
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return serializers.serialize(format, objects, indent=indent)
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except Exception, e:
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if show_traceback:
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raise
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raise CommandError("Unable to serialize database: %s" % e)
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