Fixed #20485 -- Refactored loaddata for speed.
Thanks Anssi for reporting this performance bottleneck.
This commit is contained in:
Aymeric Augustin
parent
b55624a026
commit
51aa000378
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@ -1,7 +1,8 @@
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from __future__ import unicode_literals
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import os
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import glob
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import gzip
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import os
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import zipfile
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from optparse import make_option
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import warnings
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@ -12,9 +13,9 @@ from django.core.management.base import BaseCommand, CommandError
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from django.core.management.color import no_style
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from django.db import (connections, router, transaction, DEFAULT_DB_ALIAS,
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IntegrityError, DatabaseError)
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from django.db.models import get_apps
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from django.db.models import get_app_paths
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from django.utils.encoding import force_text
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from django.utils._os import upath
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from django.utils.functional import cached_property, memoize
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from itertools import product
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try:
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@ -44,9 +45,8 @@ class Command(BaseCommand):
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if not len(fixture_labels):
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raise CommandError(
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"No database fixture specified. Please provide the path of at "
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"least one fixture in the command line."
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)
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"No database fixture specified. Please provide the path "
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"of at least one fixture in the command line.")
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self.verbosity = int(options.get('verbosity'))
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@ -69,37 +69,18 @@ class Command(BaseCommand):
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self.fixture_object_count = 0
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self.models = set()
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class SingleZipReader(zipfile.ZipFile):
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def __init__(self, *args, **kwargs):
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zipfile.ZipFile.__init__(self, *args, **kwargs)
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if settings.DEBUG:
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assert len(self.namelist()) == 1, "Zip-compressed fixtures must contain only one file."
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def read(self):
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return zipfile.ZipFile.read(self, self.namelist()[0])
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self.compression_types = {
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self.serialization_formats = serializers.get_public_serializer_formats()
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self.compression_formats = {
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None: open,
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'gz': gzip.GzipFile,
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'zip': SingleZipReader
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}
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if has_bz2:
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self.compression_types['bz2'] = bz2.BZ2File
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app_module_paths = []
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for app in get_apps():
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if hasattr(app, '__path__'):
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# It's a 'models/' subpackage
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for path in app.__path__:
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app_module_paths.append(upath(path))
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else:
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# It's a models.py module
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app_module_paths.append(upath(app.__file__))
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app_fixtures = [os.path.join(os.path.dirname(path), 'fixtures') for path in app_module_paths]
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self.compression_formats['bz2'] = bz2.BZ2File
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with connection.constraint_checks_disabled():
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for fixture_label in fixture_labels:
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self.load_label(fixture_label, app_fixtures)
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self.load_label(fixture_label)
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# Since we disabled constraint checks, we must manually check for
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# any invalid keys that might have been added
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@ -124,129 +105,174 @@ class Command(BaseCommand):
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if self.verbosity >= 1:
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if self.fixture_object_count == self.loaded_object_count:
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self.stdout.write("Installed %d object(s) from %d fixture(s)" % (
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self.loaded_object_count, self.fixture_count))
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self.stdout.write("Installed %d object(s) from %d fixture(s)" %
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(self.loaded_object_count, self.fixture_count))
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else:
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self.stdout.write("Installed %d object(s) (of %d) from %d fixture(s)" % (
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self.loaded_object_count, self.fixture_object_count, self.fixture_count))
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self.stdout.write("Installed %d object(s) (of %d) from %d fixture(s)" %
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(self.loaded_object_count, self.fixture_object_count, self.fixture_count))
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def load_label(self, fixture_label, app_fixtures):
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def load_label(self, fixture_label):
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"""
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Loads fixtures files for a given label.
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"""
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for fixture_file, fixture_dir, fixture_name in self.find_fixtures(fixture_label):
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_, ser_fmt, cmp_fmt = self.parse_name(os.path.basename(fixture_file))
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open_method = self.compression_formats[cmp_fmt]
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fixture = open_method(fixture_file, 'r')
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try:
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self.fixture_count += 1
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objects_in_fixture = 0
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loaded_objects_in_fixture = 0
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if self.verbosity >= 2:
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self.stdout.write("Installing %s fixture '%s' from %s." %
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(ser_fmt, fixture_name, humanize(fixture_dir)))
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parts = fixture_label.split('.')
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objects = serializers.deserialize(ser_fmt, fixture,
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using=self.using, ignorenonexistent=self.ignore)
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if len(parts) > 1 and parts[-1] in self.compression_types:
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compression_formats = [parts[-1]]
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parts = parts[:-1]
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else:
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compression_formats = self.compression_types.keys()
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for obj in objects:
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objects_in_fixture += 1
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if router.allow_syncdb(self.using, obj.object.__class__):
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loaded_objects_in_fixture += 1
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self.models.add(obj.object.__class__)
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try:
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obj.save(using=self.using)
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except (DatabaseError, IntegrityError) as e:
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e.args = ("Could not load %(app_label)s.%(object_name)s(pk=%(pk)s): %(error_msg)s" % {
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'app_label': obj.object._meta.app_label,
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'object_name': obj.object._meta.object_name,
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'pk': obj.object.pk,
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'error_msg': force_text(e)
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},)
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raise
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if len(parts) == 1:
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fixture_name = parts[0]
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formats = serializers.get_public_serializer_formats()
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else:
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fixture_name, format = '.'.join(parts[:-1]), parts[-1]
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if format in serializers.get_public_serializer_formats():
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formats = [format]
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else:
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formats = []
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self.loaded_object_count += loaded_objects_in_fixture
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self.fixture_object_count += objects_in_fixture
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except Exception as e:
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if not isinstance(e, CommandError):
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e.args = ("Problem installing fixture '%s': %s" % (fixture_file, e),)
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raise
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finally:
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fixture.close()
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if formats:
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if self.verbosity >= 2:
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self.stdout.write("Loading '%s' fixtures..." % fixture_name)
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else:
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# If the fixture we loaded contains 0 objects, assume that an
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# error was encountered during fixture loading.
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if objects_in_fixture == 0:
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raise CommandError(
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"No fixture data found for '%s'. "
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"(File format may be invalid.)" % fixture_name)
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def _find_fixtures(self, fixture_label):
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"""
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Finds fixture files for a given label.
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"""
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fixture_name, ser_fmt, cmp_fmt = self.parse_name(fixture_label)
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databases = [self.using, None]
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cmp_fmts = list(self.compression_formats.keys()) if cmp_fmt is None else [cmp_fmt]
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ser_fmts = serializers.get_public_serializer_formats() if ser_fmt is None else [ser_fmt]
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# Check kept for backwards-compatibility; it doesn't look very useful.
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if '.' in fixture_name:
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raise CommandError(
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"Problem installing fixture '%s': %s is not a known serialization format." %
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(fixture_name, format))
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if os.path.isabs(fixture_name):
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fixture_dirs = [fixture_name]
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else:
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fixture_dirs = app_fixtures + list(settings.FIXTURE_DIRS) + ['']
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label_found = False
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for fixture_dir in fixture_dirs:
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found = self.process_dir(fixture_dir, fixture_name,
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compression_formats, formats)
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label_found = label_found or found
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if fixture_name != 'initial_data' and not label_found:
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warnings.warn("No fixture named '%s' found." % fixture_name)
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def process_dir(self, fixture_dir, fixture_name, compression_formats,
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serialization_formats):
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humanize = lambda dirname: "'%s'" % dirname if dirname else 'absolute path'
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"Problem installing fixture '%s': %s is not a known "
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"serialization format." % tuple(fixture_name.rsplit('.')))
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if self.verbosity >= 2:
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self.stdout.write("Checking %s for fixtures..." % humanize(fixture_dir))
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self.stdout.write("Loading '%s' fixtures..." % fixture_name)
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label_found = False
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for combo in product([self.using, None], serialization_formats, compression_formats):
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database, format, compression_format = combo
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file_name = '.'.join(
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p for p in [
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fixture_name, database, format, compression_format
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]
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if p
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)
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if os.path.isabs(fixture_name):
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fixture_dirs = [os.path.dirname(fixture_name)]
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fixture_name = os.path.basename(fixture_name)
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else:
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fixture_dirs = self.fixture_dirs
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if self.verbosity >= 3:
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self.stdout.write("Trying %s for %s fixture '%s'..." % \
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(humanize(fixture_dir), file_name, fixture_name))
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full_path = os.path.join(fixture_dir, file_name)
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open_method = self.compression_types[compression_format]
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try:
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fixture = open_method(full_path, 'r')
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except IOError:
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if self.verbosity >= 2:
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self.stdout.write("No %s fixture '%s' in %s." % \
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(format, fixture_name, humanize(fixture_dir)))
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else:
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try:
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if label_found:
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raise CommandError("Multiple fixtures named '%s' in %s. Aborting." %
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(fixture_name, humanize(fixture_dir)))
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suffixes = ('.'.join(ext for ext in combo if ext)
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for combo in product(databases, ser_fmts, cmp_fmts))
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targets = set('.'.join((fixture_name, suffix)) for suffix in suffixes)
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self.fixture_count += 1
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objects_in_fixture = 0
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loaded_objects_in_fixture = 0
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if self.verbosity >= 2:
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self.stdout.write("Installing %s fixture '%s' from %s." % \
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(format, fixture_name, humanize(fixture_dir)))
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fixture_files = []
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for fixture_dir in fixture_dirs:
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if self.verbosity >= 2:
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self.stdout.write("Checking %s for fixtures..." % humanize(fixture_dir))
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fixture_files_in_dir = []
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for candidate in glob.iglob(os.path.join(fixture_dir, fixture_name + '*')):
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if os.path.basename(candidate) in targets:
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# Save the fixture_dir and fixture_name for future error messages.
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fixture_files_in_dir.append((candidate, fixture_dir, fixture_name))
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objects = serializers.deserialize(format, fixture, using=self.using, ignorenonexistent=self.ignore)
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if self.verbosity >= 2 and not fixture_files_in_dir:
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self.stdout.write("No fixture '%s' in %s." %
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(fixture_name, humanize(fixture_dir)))
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for obj in objects:
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objects_in_fixture += 1
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if router.allow_syncdb(self.using, obj.object.__class__):
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loaded_objects_in_fixture += 1
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self.models.add(obj.object.__class__)
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try:
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obj.save(using=self.using)
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except (DatabaseError, IntegrityError) as e:
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e.args = ("Could not load %(app_label)s.%(object_name)s(pk=%(pk)s): %(error_msg)s" % {
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'app_label': obj.object._meta.app_label,
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'object_name': obj.object._meta.object_name,
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'pk': obj.object.pk,
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'error_msg': force_text(e)
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},)
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raise
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# Check kept for backwards-compatibility; it isn't clear why
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# duplicates are only allowed in different directories.
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if len(fixture_files_in_dir) > 1:
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raise CommandError(
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"Multiple fixtures named '%s' in %s. Aborting." %
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(fixture_name, humanize(fixture_dir)))
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fixture_files.extend(fixture_files_in_dir)
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self.loaded_object_count += loaded_objects_in_fixture
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self.fixture_object_count += objects_in_fixture
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label_found = True
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except Exception as e:
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if not isinstance(e, CommandError):
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e.args = ("Problem installing fixture '%s': %s" % (full_path, e),)
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raise
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finally:
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fixture.close()
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if fixture_name != 'initial_data' and not fixture_files:
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# Warning kept for backwards-compatibility; why not an exception?
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warnings.warn("No fixture named '%s' found." % fixture_name)
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# If the fixture we loaded contains 0 objects, assume that an
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# error was encountered during fixture loading.
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if objects_in_fixture == 0:
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raise CommandError(
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"No fixture data found for '%s'. (File format may be invalid.)" %
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(fixture_name))
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return fixture_files
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return label_found
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_label_to_fixtures_cache = {}
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find_fixtures = memoize(_find_fixtures, _label_to_fixtures_cache, 2)
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@cached_property
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def fixture_dirs(self):
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"""
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Return a list of fixture directories.
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The list contains the 'fixtures' subdirectory of each installed
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application, if it exists, the directories in FIXTURE_DIRS, and the
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current directory.
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"""
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dirs = []
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for path in get_app_paths():
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d = os.path.join(os.path.dirname(path), 'fixtures')
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if os.path.isdir(d):
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dirs.append(d)
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dirs.extend(list(settings.FIXTURE_DIRS))
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dirs.append('')
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dirs = [os.path.abspath(os.path.realpath(d)) for d in dirs]
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return dirs
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def parse_name(self, fixture_name):
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"""
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Splits fixture name in name, serialization format, compression format.
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"""
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parts = fixture_name.rsplit('.', 2)
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if len(parts) > 1 and parts[-1] in self.compression_formats:
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cmp_fmt = parts[-1]
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parts = parts[:-1]
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else:
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cmp_fmt = None
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if len(parts) > 1 and parts[-1] in self.serialization_formats:
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ser_fmt = parts[-1]
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parts = parts[:-1]
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else:
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ser_fmt = None
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name = '.'.join(parts)
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return name, ser_fmt, cmp_fmt
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class SingleZipReader(zipfile.ZipFile):
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def __init__(self, *args, **kwargs):
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zipfile.ZipFile.__init__(self, *args, **kwargs)
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if len(self.namelist()) != 1:
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raise ValueError("Zip-compressed fixtures must contain one file.")
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def read(self):
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return zipfile.ZipFile.read(self, self.namelist()[0])
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def humanize(dirname):
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return "'%s'" % dirname if dirname else 'absolute path'
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@ -450,7 +450,7 @@ class TestFixtures(TestCase):
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commit=False,
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stdout=stdout_output,
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)
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self.assertTrue("No xml fixture 'this_fixture_doesnt_exist' in" in
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self.assertTrue("No fixture 'this_fixture_doesnt_exist' in" in
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force_text(stdout_output.getvalue()))
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