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Initial stab at a migrate command, it's probably quite a way off.
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Andrew Godwin
@@ -1,15 +1,8 @@
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import warnings
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from optparse import make_option
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import itertools
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import traceback
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from django.conf import settings
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from django.db import DEFAULT_DB_ALIAS
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from django.core.management import call_command
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from django.core.management.base import NoArgsCommand
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from django.core.management.color import no_style
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from django.core.management.sql import custom_sql_for_model, emit_post_sync_signal, emit_pre_sync_signal
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from django.db import connections, router, transaction, models, DEFAULT_DB_ALIAS
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from django.utils.datastructures import SortedDict
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from django.utils.importlib import import_module
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class Command(NoArgsCommand):
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@@ -22,143 +15,8 @@ class Command(NoArgsCommand):
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default=DEFAULT_DB_ALIAS, help='Nominates a database to synchronize. '
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'Defaults to the "default" database.'),
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)
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help = "Create the database tables for all apps in INSTALLED_APPS whose tables haven't already been created."
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help = "Deprecated - use 'migrate' instead."
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def handle_noargs(self, **options):
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verbosity = int(options.get('verbosity'))
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interactive = options.get('interactive')
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show_traceback = options.get('traceback')
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load_initial_data = options.get('load_initial_data')
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self.style = no_style()
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# Import the 'management' module within each installed app, to register
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# dispatcher events.
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for app_name in settings.INSTALLED_APPS:
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try:
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import_module('.management', app_name)
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except ImportError as exc:
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# This is slightly hackish. We want to ignore ImportErrors
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# if the "management" module itself is missing -- but we don't
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# want to ignore the exception if the management module exists
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# but raises an ImportError for some reason. The only way we
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# can do this is to check the text of the exception. Note that
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# we're a bit broad in how we check the text, because different
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# Python implementations may not use the same text.
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# CPython uses the text "No module named management"
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# PyPy uses "No module named myproject.myapp.management"
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msg = exc.args[0]
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if not msg.startswith('No module named') or 'management' not in msg:
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raise
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db = options.get('database')
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connection = connections[db]
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cursor = connection.cursor()
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# Get a list of already installed *models* so that references work right.
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tables = connection.introspection.table_names()
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seen_models = connection.introspection.installed_models(tables)
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created_models = set()
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pending_references = {}
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# Build the manifest of apps and models that are to be synchronized
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all_models = [
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(app.__name__.split('.')[-2],
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[m for m in models.get_models(app, include_auto_created=True)
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if router.allow_syncdb(db, m)])
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for app in models.get_apps()
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]
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def model_installed(model):
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opts = model._meta
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converter = connection.introspection.table_name_converter
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# Note that if a model is unmanaged we short-circuit and never try to install it
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return not ((converter(opts.db_table) in tables) or
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(opts.auto_created and converter(opts.auto_created._meta.db_table) in tables))
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manifest = SortedDict(
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(app_name, list(filter(model_installed, model_list)))
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for app_name, model_list in all_models
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)
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create_models = set([x for x in itertools.chain(*manifest.values())])
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emit_pre_sync_signal(create_models, verbosity, interactive, db)
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# Create the tables for each model
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if verbosity >= 1:
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self.stdout.write("Creating tables ...\n")
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with transaction.commit_on_success_unless_managed(using=db):
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for app_name, model_list in manifest.items():
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for model in model_list:
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# Create the model's database table, if it doesn't already exist.
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if verbosity >= 3:
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self.stdout.write("Processing %s.%s model\n" % (app_name, model._meta.object_name))
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sql, references = connection.creation.sql_create_model(model, self.style, seen_models)
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seen_models.add(model)
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created_models.add(model)
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for refto, refs in references.items():
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pending_references.setdefault(refto, []).extend(refs)
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if refto in seen_models:
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sql.extend(connection.creation.sql_for_pending_references(refto, self.style, pending_references))
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sql.extend(connection.creation.sql_for_pending_references(model, self.style, pending_references))
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if verbosity >= 1 and sql:
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self.stdout.write("Creating table %s\n" % model._meta.db_table)
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for statement in sql:
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cursor.execute(statement)
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tables.append(connection.introspection.table_name_converter(model._meta.db_table))
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# Send the post_syncdb signal, so individual apps can do whatever they need
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# to do at this point.
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emit_post_sync_signal(created_models, verbosity, interactive, db)
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# The connection may have been closed by a syncdb handler.
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cursor = connection.cursor()
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# Install custom SQL for the app (but only if this
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# is a model we've just created)
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if verbosity >= 1:
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self.stdout.write("Installing custom SQL ...\n")
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for app_name, model_list in manifest.items():
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for model in model_list:
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if model in created_models:
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custom_sql = custom_sql_for_model(model, self.style, connection)
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if custom_sql:
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if verbosity >= 2:
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self.stdout.write("Installing custom SQL for %s.%s model\n" % (app_name, model._meta.object_name))
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try:
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with transaction.commit_on_success_unless_managed(using=db):
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for sql in custom_sql:
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cursor.execute(sql)
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except Exception as e:
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self.stderr.write("Failed to install custom SQL for %s.%s model: %s\n" % \
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(app_name, model._meta.object_name, e))
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if show_traceback:
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traceback.print_exc()
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else:
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if verbosity >= 3:
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self.stdout.write("No custom SQL for %s.%s model\n" % (app_name, model._meta.object_name))
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if verbosity >= 1:
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self.stdout.write("Installing indexes ...\n")
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# Install SQL indices for all newly created models
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for app_name, model_list in manifest.items():
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for model in model_list:
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if model in created_models:
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index_sql = connection.creation.sql_indexes_for_model(model, self.style)
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if index_sql:
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if verbosity >= 2:
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self.stdout.write("Installing index for %s.%s model\n" % (app_name, model._meta.object_name))
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try:
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with transaction.commit_on_success_unless_managed(using=db):
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for sql in index_sql:
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cursor.execute(sql)
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except Exception as e:
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self.stderr.write("Failed to install index for %s.%s model: %s\n" % \
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(app_name, model._meta.object_name, e))
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# Load initial_data fixtures (unless that has been disabled)
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if load_initial_data:
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call_command('loaddata', 'initial_data', verbosity=verbosity,
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database=db, skip_validation=True)
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warnings.warn("The syncdb command will be removed in Django 1.9", PendingDeprecationWarning)
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call_command("migrate", **options)
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