| 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 |
| loaded_object_count = 0 |
| fixture_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 >= 2: |
| self.stdout.write("Loading '%s' fixtures...\n" % fixture_name) |
| else: |
| self.stderr.write( |
| self.style.ERROR("Problem installing fixture '%s': %s is not a known serialization format.\n" % |
| (fixture_name, format))) |
| if commit: |
| 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 >= 2: |
| self.stdout.write("Checking %s for fixtures...\n" % 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 >= 3: |
| self.stdout.write("Trying %s for %s fixture '%s'...\n" % \ |
| (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() |
| self.stderr.write(self.style.ERROR("Multiple fixtures named '%s' in %s. Aborting.\n" % |
| (fixture_name, humanize(fixture_dir)))) |
| if commit: |
| transaction.rollback(using=using) |
| transaction.leave_transaction_management(using=using) |
| return |
| else: |
| fixture_count += 1 |
| objects_in_fixture = 0 |
| loaded_objects_in_fixture = 0 |
| if verbosity >= 2: |
| self.stdout.write("Installing %s fixture '%s' from %s.\n" % \ |
| (format, fixture_name, humanize(fixture_dir))) |
| try: |
| objects = serializers.deserialize(format, fixture, using=using) |
| for obj in objects: |
| objects_in_fixture += 1 |
| if router.allow_syncdb(using, obj.object.__class__): |
| loaded_objects_in_fixture += 1 |
| models.add(obj.object.__class__) |
| obj.save(using=using) |
| loaded_object_count += loaded_objects_in_fixture |
| fixture_object_count += objects_in_fixture |
| label_found = True |
| except (SystemExit, KeyboardInterrupt): |
| raise |
| except Exception: |
| import traceback |
| fixture.close() |
| if commit: |
| transaction.rollback(using=using) |
| transaction.leave_transaction_management(using=using) |
| if show_traceback: |
| traceback.print_exc() |
| else: |
| self.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: |
| self.stderr.write( |
| self.style.ERROR("No fixture data found for '%s'. (File format may be invalid.)\n" % |
| (fixture_name))) |
| if commit: |
| transaction.rollback(using=using) |
| transaction.leave_transaction_management(using=using) |
| return |
| |
| except Exception, e: |
| if verbosity >= 2: |
| self.stdout.write("No %s fixture '%s' in %s.\n" % \ |
| (format, fixture_name, humanize(fixture_dir))) |
| |
| # If we found even one object in a fixture, we need to reset the |
| # database sequences. |
| if loaded_object_count > 0: |
| sequence_sql = connection.ops.sequence_reset_sql(self.style, models) |
| if sequence_sql: |
| if verbosity >= 2: |
| self.stdout.write("Resetting sequences\n") |
| for line in sequence_sql: |
| cursor.execute(line) |
| |
| if commit: |
| transaction.commit(using=using) |
| transaction.leave_transaction_management(using=using) |
| |
| if fixture_object_count == 0: |
| if verbosity >= 1: |
| self.stdout.write("No fixtures found.\n") |
| else: |
| if verbosity >= 1: |
| if fixture_object_count == loaded_object_count: |
| self.stdout.write("Installed %d object(s) from %d fixture(s)\n" % ( |
| loaded_object_count, fixture_count)) |
| else: |
| self.stdout.write("Installed %d object(s) (of %d) from %d fixture(s)\n" % ( |
| loaded_object_count, fixture_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() |
