import sys import os import gzip import zipfile from optparse import make_option from django.conf import settings from django.core import serializers from django.core.management.base import BaseCommand from django.core.management.color import no_style from django.db import connections, router, transaction, DEFAULT_DB_ALIAS from django.db.models import get_apps from django.utils.itercompat import product try: import bz2 has_bz2 = True except ImportError: has_bz2 = False class Command(BaseCommand): help = 'Installs the named fixture(s) in the database.' args = "fixture [fixture ...]" option_list = BaseCommand.option_list + ( make_option('--database', action='store', dest='database', default=DEFAULT_DB_ALIAS, help='Nominates a specific database to load ' 'fixtures into. Defaults to the "default" database.'), ) def handle(self, *fixture_labels, **options): using = options.get('database', DEFAULT_DB_ALIAS) connection = connections[using] self.style = no_style() verbosity = int(options.get('verbosity', 1)) show_traceback = options.get('traceback', False) # commit is a stealth option - it isn't really useful as # a command line option, but it can be useful when invoking # loaddata from within another script. # If commit=True, loaddata will use its own transaction; # if commit=False, the data load SQL will become part of # the transaction in place when loaddata was invoked. commit = options.get('commit', True) # Keep a count of the installed objects and fixtures fixture_count = 0 object_count = 0 models = set() humanize = lambda dirname: dirname and "'%s'" % dirname or 'absolute path' # Get a cursor (even though we don't need one yet). This has # the side effect of initializing the test database (if # it isn't already initialized). cursor = connection.cursor() # Start transaction management. All fixtures are installed in a # single transaction to ensure that all references are resolved. if commit: transaction.commit_unless_managed(using=using) transaction.enter_transaction_management(using=using) transaction.managed(True, using=using) class SingleZipReader(zipfile.ZipFile): def __init__(self, *args, **kwargs): zipfile.ZipFile.__init__(self, *args, **kwargs) if settings.DEBUG: assert len(self.namelist()) == 1, "Zip-compressed fixtures must contain only one file." def read(self): return zipfile.ZipFile.read(self, self.namelist()[0]) compression_types = { None: file, 'gz': gzip.GzipFile, 'zip': SingleZipReader } if has_bz2: compression_types['bz2'] = bz2.BZ2File app_module_paths = [] for app in get_apps(): if hasattr(app, '__path__'): # It's a 'models/' subpackage for path in app.__path__: app_module_paths.append(path) else: # It's a models.py module app_module_paths.append(app.__file__) app_fixtures = [os.path.join(os.path.dirname(path), 'fixtures') for path in app_module_paths] for fixture_label in fixture_labels: parts = fixture_label.split('.') if len(parts) > 1 and parts[-1] in compression_types: compression_formats = [parts[-1]] parts = parts[:-1] else: compression_formats = compression_types.keys() if len(parts) == 1: fixture_name = parts[0] formats = serializers.get_public_serializer_formats() else: fixture_name, format = '.'.join(parts[:-1]), parts[-1] if format in serializers.get_public_serializer_formats(): formats = [format] else: formats = [] if formats: if verbosity > 1: print "Loading '%s' fixtures..." % fixture_name else: sys.stderr.write( self.style.ERROR("Problem installing fixture '%s': %s is not a known serialization format." % (fixture_name, format))) transaction.rollback(using=using) transaction.leave_transaction_management(using=using) return if os.path.isabs(fixture_name): fixture_dirs = [fixture_name] else: fixture_dirs = app_fixtures + list(settings.FIXTURE_DIRS) + [''] for fixture_dir in fixture_dirs: if verbosity > 1: print "Checking %s for fixtures..." % humanize(fixture_dir) label_found = False for combo in product([using, None], formats, compression_formats): database, format, compression_format = combo file_name = '.'.join( p for p in [ fixture_name, database, format, compression_format ] if p ) if verbosity > 1: print "Trying %s for %s fixture '%s'..." % \ (humanize(fixture_dir), file_name, fixture_name) full_path = os.path.join(fixture_dir, file_name) open_method = compression_types[compression_format] try: fixture = open_method(full_path, 'r') if label_found: fixture.close() print self.style.ERROR("Multiple fixtures named '%s' in %s. Aborting." % (fixture_name, humanize(fixture_dir))) transaction.rollback(using=using) transaction.leave_transaction_management(using=using) return else: fixture_count += 1 objects_in_fixture = 0 if verbosity > 0: print "Installing %s fixture '%s' from %s." % \ (format, fixture_name, humanize(fixture_dir)) try: objects = serializers.deserialize(format, fixture, using=using) for obj in objects: if router.allow_syncdb(using, obj.object.__class__): objects_in_fixture += 1 models.add(obj.object.__class__) obj.save(using=using) object_count += objects_in_fixture label_found = True except (SystemExit, KeyboardInterrupt): raise except Exception: import traceback fixture.close() transaction.rollback(using=using) transaction.leave_transaction_management(using=using) if show_traceback: traceback.print_exc() else: sys.stderr.write( self.style.ERROR("Problem installing fixture '%s': %s\n" % (full_path, ''.join(traceback.format_exception(sys.exc_type, sys.exc_value, sys.exc_traceback))))) return fixture.close() # If the fixture we loaded contains 0 objects, assume that an # error was encountered during fixture loading. if objects_in_fixture == 0: sys.stderr.write( self.style.ERROR("No fixture data found for '%s'. (File format may be invalid.)" % (fixture_name))) transaction.rollback(using=using) transaction.leave_transaction_management(using=using) return except Exception, e: if verbosity > 1: print "No %s fixture '%s' in %s." % \ (format, fixture_name, humanize(fixture_dir)) # If we found even one object in a fixture, we need to reset the # database sequences. if object_count > 0: sequence_sql = connection.ops.sequence_reset_sql(self.style, models) if sequence_sql: if verbosity > 1: print "Resetting sequences" for line in sequence_sql: cursor.execute(line) if commit: transaction.commit(using=using) transaction.leave_transaction_management(using=using) if object_count == 0: if verbosity > 0: print "No fixtures found." else: if verbosity > 0: print "Installed %d object(s) from %d fixture(s)" % (object_count, fixture_count) # Close the DB connection. This is required as a workaround for an # edge case in MySQL: if the same connection is used to # create tables, load data, and query, the query can return # incorrect results. See Django #7572, MySQL #37735. if commit: connection.close()