web/lib/django/core/management/commands/syncdb.py
changeset 0 0d40e90630ef
child 29 cc9b7e14412b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/core/management/commands/syncdb.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,150 @@
+from django.core.management.base import NoArgsCommand
+from django.core.management.color import no_style
+from django.utils.importlib import import_module
+from optparse import make_option
+import sys
+
+try:
+    set
+except NameError:
+    from sets import Set as set   # Python 2.3 fallback
+
+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.'),
+    )
+    help = "Create the database tables for all apps in INSTALLED_APPS whose tables haven't already been created."
+
+    def handle_noargs(self, **options):
+        from django.db import connection, transaction, models
+        from django.conf import settings
+        from django.core.management.sql import custom_sql_for_model, emit_post_sync_signal
+
+        verbosity = int(options.get('verbosity', 1))
+        interactive = options.get('interactive')
+        show_traceback = options.get('traceback', False)
+
+        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, 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
+
+        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 = {}
+
+        # Create the tables for each model
+        for app in models.get_apps():
+            app_name = app.__name__.split('.')[-2]
+            model_list = models.get_models(app)
+            for model in model_list:
+                # Create the model's database table, if it doesn't already exist.
+                if verbosity >= 2:
+                    print "Processing %s.%s model" % (app_name, model._meta.object_name)
+                if connection.introspection.table_name_converter(model._meta.db_table) in tables:
+                    continue
+                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:
+                    print "Creating table %s" % model._meta.db_table
+                for statement in sql:
+                    cursor.execute(statement)
+                tables.append(connection.introspection.table_name_converter(model._meta.db_table))
+
+        # Create the m2m tables. This must be done after all tables have been created
+        # to ensure that all referred tables will exist.
+        for app in models.get_apps():
+            app_name = app.__name__.split('.')[-2]
+            model_list = models.get_models(app)
+            for model in model_list:
+                if model in created_models:
+                    sql = connection.creation.sql_for_many_to_many(model, self.style)
+                    if sql:
+                        if verbosity >= 2:
+                            print "Creating many-to-many tables for %s.%s model" % (app_name, model._meta.object_name)
+                        for statement in sql:
+                            cursor.execute(statement)
+
+        transaction.commit_unless_managed()
+
+        # 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)
+
+        # 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)
+        for app in models.get_apps():
+            app_name = app.__name__.split('.')[-2]
+            for model in models.get_models(app):
+                if model in created_models:
+                    custom_sql = custom_sql_for_model(model, self.style)
+                    if custom_sql:
+                        if verbosity >= 1:
+                            print "Installing custom SQL for %s.%s model" % (app_name, model._meta.object_name)
+                        try:
+                            for sql in custom_sql:
+                                cursor.execute(sql)
+                        except Exception, e:
+                            sys.stderr.write("Failed to install custom SQL for %s.%s model: %s\n" % \
+                                                (app_name, model._meta.object_name, e))
+                            if show_traceback:
+                                import traceback
+                                traceback.print_exc()
+                            transaction.rollback_unless_managed()
+                        else:
+                            transaction.commit_unless_managed()
+                    else:
+                        if verbosity >= 2:
+                            print "No custom SQL for %s.%s model" % (app_name, model._meta.object_name)
+        # Install SQL indicies for all newly created models
+        for app in models.get_apps():
+            app_name = app.__name__.split('.')[-2]
+            for model in models.get_models(app):
+                if model in created_models:
+                    index_sql = connection.creation.sql_indexes_for_model(model, self.style)
+                    if index_sql:
+                        if verbosity >= 1:
+                            print "Installing index for %s.%s model" % (app_name, model._meta.object_name)
+                        try:
+                            for sql in index_sql:
+                                cursor.execute(sql)
+                        except Exception, e:
+                            sys.stderr.write("Failed to install index for %s.%s model: %s\n" % \
+                                                (app_name, model._meta.object_name, e))
+                            transaction.rollback_unless_managed()
+                        else:
+                            transaction.commit_unless_managed()
+
+        # Install the 'initial_data' fixture, using format discovery
+        from django.core.management import call_command
+        call_command('loaddata', 'initial_data', verbosity=verbosity)