def handle_noargs(self, **options): verbosity = int(options.get("verbosity")) interactive = options.get("interactive") show_traceback = options.get("traceback") load_initial_data = options.get("load_initial_data") self.style = no_style() # Import the 'management' module within each installed app, to register # dispatcher events. for app_name in settings.INSTALLED_APPS: try: import_module(".management", app_name) except ImportError as exc: # This is slightly hackish. We want to ignore ImportErrors # if the "management" module itself is missing -- but we don't # want to ignore the exception if the management module exists # but raises an ImportError for some reason. The only way we # can do this is to check the text of the exception. Note that # we're a bit broad in how we check the text, because different # Python implementations may not use the same text. # CPython uses the text "No module named management" # PyPy uses "No module named myproject.myapp.management" msg = exc.args[0] if not msg.startswith("No module named") or "management" not in msg: raise db = options.get("database") connection = connections[db] cursor = connection.cursor() # Get a list of already installed *models* so that references work right. tables = connection.introspection.table_names() seen_models = connection.introspection.installed_models(tables) created_models = set() pending_references = {} # Build the manifest of apps and models that are to be synchronized all_models = [ ( app.__name__.split(".")[-2], [m for m in models.get_models(app, include_auto_created=True) if router.allow_syncdb(db, m)], ) for app in models.get_apps() ] def model_installed(model): opts = model._meta converter = connection.introspection.table_name_converter return not ( (converter(opts.db_table) in tables) or (opts.auto_created and converter(opts.auto_created._meta.db_table) in tables) ) manifest = SortedDict( (app_name, list(filter(model_installed, model_list))) for app_name, model_list in all_models ) # Create the tables for each model if verbosity >= 1: self.stdout.write("Creating tables ...\n") for app_name, model_list in manifest.items(): for model in model_list: # Create the model's database table, if it doesn't already exist. if verbosity >= 3: self.stdout.write("Processing %s.%s model\n" % (app_name, model._meta.object_name)) sql, references = connection.creation.sql_create_model(model, self.style, seen_models) seen_models.add(model) created_models.add(model) for refto, refs in references.items(): pending_references.setdefault(refto, []).extend(refs) if refto in seen_models: sql.extend( connection.creation.sql_for_pending_references(refto, self.style, pending_references) ) sql.extend(connection.creation.sql_for_pending_references(model, self.style, pending_references)) if verbosity >= 1 and sql: self.stdout.write("Creating table %s\n" % model._meta.db_table) for statement in sql: cursor.execute(statement) tables.append(connection.introspection.table_name_converter(model._meta.db_table)) transaction.commit_unless_managed(using=db) # Send the post_syncdb signal, so individual apps can do whatever they need # to do at this point. emit_post_sync_signal(created_models, verbosity, interactive, db) # The connection may have been closed by a syncdb handler. cursor = connection.cursor() # Install custom SQL for the app (but only if this # is a model we've just created) if verbosity >= 1: self.stdout.write("Installing custom SQL ...\n") for app_name, model_list in manifest.items(): for model in model_list: if model in created_models: custom_sql = custom_sql_for_model(model, self.style, connection) if custom_sql: if verbosity >= 2: self.stdout.write( "Installing custom SQL for %s.%s model\n" % (app_name, model._meta.object_name) ) try: for sql in custom_sql: cursor.execute(sql) except Exception as e: self.stderr.write( "Failed to install custom SQL for %s.%s model: %s\n" % (app_name, model._meta.object_name, e) ) if show_traceback: traceback.print_exc() transaction.rollback_unless_managed(using=db) else: transaction.commit_unless_managed(using=db) else: if verbosity >= 3: self.stdout.write("No custom SQL for %s.%s model\n" % (app_name, model._meta.object_name)) if verbosity >= 1: self.stdout.write("Installing indexes ...\n") # Install SQL indices for all newly created models for app_name, model_list in manifest.items(): for model in model_list: if model in created_models: index_sql = connection.creation.sql_indexes_for_model(model, self.style) if index_sql: if verbosity >= 2: self.stdout.write( "Installing index for %s.%s model\n" % (app_name, model._meta.object_name) ) try: for sql in index_sql: cursor.execute(sql) except Exception as e: self.stderr.write( "Failed to install index for %s.%s model: %s\n" % (app_name, model._meta.object_name, e) ) transaction.rollback_unless_managed(using=db) else: transaction.commit_unless_managed(using=db) # Load initial_data fixtures (unless that has been disabled) if load_initial_data: call_command("loaddata", "initial_data", verbosity=verbosity, database=db, skip_validation=True)
def handle_noargs(self, **options): db = options.get('database') connection = connections[db] verbosity = int(options.get('verbosity')) interactive = options.get('interactive') # 'reset_sequences' is a stealth option reset_sequences = options.get('reset_sequences', True) self.style = no_style() # Import the 'management' module within each installed app, to register # dispatcher events. for app_name in settings.INSTALLED_APPS: try: import_module('.management', app_name) except ImportError: pass sql_list = sql_flush(self.style, connection, only_django=True, reset_sequences=reset_sequences) if interactive: confirm = input("""You have requested a flush of the database. This will IRREVERSIBLY DESTROY all data currently in the %r database, and return each table to the state it was in after syncdb. Are you sure you want to do this? Type 'yes' to continue, or 'no' to cancel: """ % connection.settings_dict['NAME']) else: confirm = 'yes' if confirm == 'yes': try: cursor = connection.cursor() for sql in sql_list: cursor.execute(sql) except Exception as e: transaction.rollback_unless_managed(using=db) raise CommandError("""Database %s couldn't be flushed. Possible reasons: * The database isn't running or isn't configured correctly. * At least one of the expected database tables doesn't exist. * The SQL was invalid. Hint: Look at the output of 'django-admin.py sqlflush'. That's the SQL this command wasn't able to run. The full error: %s""" % (connection.settings_dict['NAME'], e)) transaction.commit_unless_managed(using=db) # Emit the post sync signal. This allows individual # applications to respond as if the database had been # sync'd from scratch. all_models = [] for app in models.get_apps(): all_models.extend([ m for m in models.get_models(app, include_auto_created=True) if router.allow_syncdb(db, m) ]) emit_post_sync_signal(set(all_models), verbosity, interactive, db) # Reinstall the initial_data fixture. kwargs = options.copy() kwargs['database'] = db if options.get('load_initial_data'): # Reinstall the initial_data fixture. call_command('loaddata', 'initial_data', **options) else: self.stdout.write("Flush cancelled.\n")