EVOLUTION-MANAGER

Edit File: syncdb.py

from optparse import make_option import itertools import traceback from django.conf import settings from django.core.management import call_command from django.core.management.base import NoArgsCommand from django.core.management.color import no_style from django.core.management.sql import custom_sql_for_model, emit_post_sync_signal, emit_pre_sync_signal from django.db import connections, router, transaction, models, DEFAULT_DB_ALIAS from django.utils.datastructures import SortedDict from django.utils.importlib import import_module class Command(NoArgsCommand): option_list = NoArgsCommand.option_list + ( make_option('--noinput', action='store_false', dest='interactive', default=True, help='Tells Django to NOT prompt the user for input of any kind.'), make_option('--no-initial-data', action='store_false', dest='load_initial_data', default=True, help='Tells Django not to load any initial data after database synchronization.'), make_option('--database', action='store', dest='database', default=DEFAULT_DB_ALIAS, help='Nominates a database to synchronize. ' 'Defaults to the "default" database.'), ) help = "Create the database tables for all apps in INSTALLED_APPS whose tables haven't already been created." 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_models = set([x for x in itertools.chain(*manifest.values())]) emit_pre_sync_signal(create_models, verbosity, interactive, db) # Create the tables for each model if verbosity >= 1: self.stdout.write("Creating tables ...\n") with transaction.commit_on_success_unless_managed(using=db): 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)) # 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: with transaction.commit_on_success_unless_managed(using=db): 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() 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: with transaction.commit_on_success_unless_managed(using=db): 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)) # 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)