154 lines
6.3 KiB
Python
154 lines
6.3 KiB
Python
# From http://djangosnippets.org/snippets/918/
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#save into anyapp/management/commands/makefixture.py
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#or back into django/core/management/commands/makefixture.py
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#v0.1 -- current version
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#known issues:
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#no support for generic relations
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#no support for one-to-one relations
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from optparse import make_option
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from django.core import serializers
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from django.core.management.base import BaseCommand
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from django.core.management.base import CommandError
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from django.core.management.base import LabelCommand
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from django.db.models.fields.related import ForeignKey
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from django.db.models.fields.related import ManyToManyField
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from django.db.models.loading import get_models
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import debug
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DEBUG = False
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def model_name(m):
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module = m.__module__.split('.')[:-1] # remove .models
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return ".".join(module + [m._meta.object_name])
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class Command(LabelCommand):
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help = 'Output the contents of the database as a fixture of the given format.'
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args = 'modelname[pk] or modelname[id1:id2] repeated one or more times'
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option_list = BaseCommand.option_list + (
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make_option('--skip-related', default=True, action='store_false', dest='propagate',
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help='Specifies if we shall not add related objects.'),
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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('--include-reverse', default=False, action='store_true', dest='reverse',
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help='Add reverse related objects too'),
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)
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def handle_models(self, models, **options):
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format = options.get('format','json')
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indent = options.get('indent',None)
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show_traceback = options.get('traceback', False)
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propagate = options.get('propagate', True)
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opt_reverse = options.get('reverse', False)
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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 model, slice in models:
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if isinstance(slice, basestring):
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objects.extend(model._default_manager.filter(pk__exact=slice))
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elif not slice or type(slice) is list:
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items = model._default_manager.all()
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if slice and slice[0]:
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items = items.filter(pk__gte=slice[0])
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if slice and slice[1]:
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items = items.filter(pk__lt=slice[1])
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items = items.order_by(model._meta.pk.attname)
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objects.extend(items)
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else:
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raise CommandError("Wrong slice: %s" % slice)
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all = objects
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collected = set([(x.__class__, x.pk) for x in all])
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if opt_reverse:
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related = []
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for x in objects:
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attribs = []
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for name in dir(x):
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try:
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attribs.append(getattr(x, name))
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except AttributeError:
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pass
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for o in attribs:
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if "django.db.models.fields.related.RelatedManager object" in repr(o):
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for new in o.all():
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collected.add((new.__class__, new.pk))
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related.append(new)
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all.extend(related)
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if propagate:
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while objects:
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related = []
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for x in objects:
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if DEBUG:
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print "Adding %s[%s]" % (model_name(x), x.pk)
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for f in x.__class__._meta.fields + x.__class__._meta.many_to_many:
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if isinstance(f, ForeignKey):
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new = getattr(x, f.name) # instantiate object
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if new and not (new.__class__, new.pk) in collected:
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collected.add((new.__class__, new.pk))
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related.append(new)
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if isinstance(f, ManyToManyField):
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for new in getattr(x, f.name).all():
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if new and not (new.__class__, new.pk) in collected:
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collected.add((new.__class__, new.pk))
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related.append(new)
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objects = related
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all.extend(related)
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try:
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return serializers.serialize(format, all, 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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def get_models(self):
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return [(m, model_name(m)) for m in get_models()]
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def handle_label(self, labels, **options):
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parsed = []
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for label in labels:
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search, pks = label, ''
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if '[' in label:
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search, pks = label.split('[', 1)
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slice = ''
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if ':' in pks:
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slice = pks.rstrip(']').split(':', 1)
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elif pks:
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slice = pks.rstrip(']')
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models = [model for model, name in self.get_models()
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if name.endswith('.'+search) or name == search]
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if not models:
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raise CommandError("Wrong model: %s" % search)
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if len(models)>1:
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raise CommandError("Ambiguous model name: %s" % search)
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parsed.append((models[0], slice))
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return self.handle_models(parsed, **options)
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def list_models(self):
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names = [name for _model, name in self.get_models()]
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raise CommandError('Neither model name nor slice given. Installed model names: \n%s' % ",\n".join(names))
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def handle(self, *labels, **options):
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if not labels:
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self.list_models()
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output = []
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label_output = self.handle_label(labels, **options)
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if label_output:
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output.append(label_output)
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return '\n'.join(output)
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