mirror of
https://github.com/django/django.git
synced 2025-10-31 09:41:08 +00:00
Initial stab at a migrate command, it's probably quite a way off.
This commit is contained in:
Andrew Godwin
210
django/core/management/commands/migrate.py
Normal file
210
django/core/management/commands/migrate.py
Normal file
@@ -0,0 +1,210 @@
|
||||
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 color_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.db.migrations.executor import MigrationExecutor
|
||||
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 = "Updates database schema. Manages both apps with migrations and those without."
|
||||
|
||||
def handle_noargs(self, **options):
|
||||
|
||||
self.verbosity = int(options.get('verbosity'))
|
||||
self.interactive = options.get('interactive')
|
||||
self.show_traceback = options.get('traceback')
|
||||
self.load_initial_data = options.get('load_initial_data')
|
||||
|
||||
self.style = color_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
|
||||
|
||||
# Get the database we're operating from
|
||||
db = options.get('database')
|
||||
connection = connections[db]
|
||||
|
||||
# Work out which apps have migrations and which do not
|
||||
if self.verbosity >= 1:
|
||||
self.stdout.write(self.style.MIGRATE_HEADING("Calculating migration plan:"))
|
||||
executor = MigrationExecutor(connection, self.migration_progress_callback)
|
||||
if self.verbosity >= 1:
|
||||
self.stdout.write(self.style.MIGRATE_LABEL(" Apps without migrations: ") + (", ".join(executor.loader.unmigrated_apps) or "(none)"))
|
||||
|
||||
# Work out what targets they want, and then make a migration plan
|
||||
# TODO: Let users select targets
|
||||
targets = executor.loader.graph.leaf_nodes()
|
||||
plan = executor.migration_plan(targets)
|
||||
|
||||
if self.verbosity >= 1:
|
||||
self.stdout.write(self.style.MIGRATE_LABEL(" Apps with migrations: ") + (", ".join(executor.loader.disk_migrations) or "(none)"))
|
||||
|
||||
# Run the syncdb phase.
|
||||
# If you ever manage to get rid of this, I owe you many, many drinks.
|
||||
self.stdout.write(self.style.MIGRATE_HEADING("Synchronizing apps without migrations:"))
|
||||
self.sync_apps(connection, executor.loader.unmigrated_apps)
|
||||
|
||||
# Migrate!
|
||||
if self.verbosity >= 1:
|
||||
self.stdout.write(self.style.MIGRATE_HEADING("Running migrations:"))
|
||||
if not plan:
|
||||
if self.verbosity >= 1:
|
||||
self.stdout.write(" No migrations needed.")
|
||||
else:
|
||||
executor.migrate(targets, plan)
|
||||
|
||||
def migration_progress_callback(self, action, migration):
|
||||
if self.verbosity >= 1:
|
||||
if action == "apply_start":
|
||||
self.stdout.write(" Applying %s... " % migration)
|
||||
self.stdout.flush()
|
||||
elif action == "apply_success":
|
||||
self.stdout.write(" OK\n")
|
||||
elif action == "unapply_start":
|
||||
self.stdout.write(" Unapplying %s... " % migration)
|
||||
self.stdout.flush()
|
||||
elif action == "unapply_success":
|
||||
self.stdout.write(" OK\n")
|
||||
|
||||
def sync_apps(self, connection, apps):
|
||||
"Runs the old syncdb-style operation on a list of apps."
|
||||
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(connection.alias, m)
|
||||
])
|
||||
for app in models.get_apps() if app.__name__.split('.')[-2] in apps
|
||||
]
|
||||
|
||||
def model_installed(model):
|
||||
opts = model._meta
|
||||
converter = connection.introspection.table_name_converter
|
||||
# Note that if a model is unmanaged we short-circuit and never try to install it
|
||||
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, self.verbosity, self.interactive, connection.alias)
|
||||
|
||||
# Create the tables for each model
|
||||
if self.verbosity >= 1:
|
||||
self.stdout.write(" Creating tables...\n")
|
||||
with transaction.commit_on_success_unless_managed(using=connection.alias):
|
||||
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 self.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 self.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, self.verbosity, self.interactive, connection.alias)
|
||||
|
||||
# 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 self.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 self.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=connection.alias):
|
||||
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 self.show_traceback:
|
||||
traceback.print_exc()
|
||||
else:
|
||||
if self.verbosity >= 3:
|
||||
self.stdout.write(" No custom SQL for %s.%s model\n" % (app_name, model._meta.object_name))
|
||||
|
||||
if self.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 self.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=connection.alias):
|
||||
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 self.load_initial_data:
|
||||
call_command('loaddata', 'initial_data', verbosity=self.verbosity, database=connection.alias, skip_validation=True)
|
||||
@@ -1,15 +1,8 @@
|
||||
import warnings
|
||||
from optparse import make_option
|
||||
import itertools
|
||||
import traceback
|
||||
|
||||
from django.conf import settings
|
||||
from django.db import DEFAULT_DB_ALIAS
|
||||
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):
|
||||
@@ -22,143 +15,8 @@ class Command(NoArgsCommand):
|
||||
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."
|
||||
help = "Deprecated - use 'migrate' instead."
|
||||
|
||||
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
|
||||
# Note that if a model is unmanaged we short-circuit and never try to install it
|
||||
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)
|
||||
warnings.warn("The syncdb command will be removed in Django 1.9", PendingDeprecationWarning)
|
||||
call_command("migrate", **options)
|
||||
|
||||
@@ -8,10 +8,12 @@ class MigrationExecutor(object):
|
||||
up or down to a specified set of targets.
|
||||
"""
|
||||
|
||||
def __init__(self, connection):
|
||||
def __init__(self, connection, progress_callback=None):
|
||||
self.connection = connection
|
||||
self.loader = MigrationLoader(self.connection)
|
||||
self.loader.load_disk()
|
||||
self.recorder = MigrationRecorder(self.connection)
|
||||
self.progress_callback = progress_callback
|
||||
|
||||
def migration_plan(self, targets):
|
||||
"""
|
||||
@@ -34,11 +36,12 @@ class MigrationExecutor(object):
|
||||
applied.add(migration)
|
||||
return plan
|
||||
|
||||
def migrate(self, targets):
|
||||
def migrate(self, targets, plan=None):
|
||||
"""
|
||||
Migrates the database up to the given targets.
|
||||
"""
|
||||
plan = self.migration_plan(targets)
|
||||
if plan is None:
|
||||
plan = self.migration_plan(targets)
|
||||
for migration, backwards in plan:
|
||||
if not backwards:
|
||||
self.apply_migration(migration)
|
||||
@@ -49,16 +52,24 @@ class MigrationExecutor(object):
|
||||
"""
|
||||
Runs a migration forwards.
|
||||
"""
|
||||
if self.progress_callback:
|
||||
self.progress_callback("apply_start", migration)
|
||||
with self.connection.schema_editor() as schema_editor:
|
||||
project_state = self.loader.graph.project_state((migration.app_label, migration.name), at_end=False)
|
||||
migration.apply(project_state, schema_editor)
|
||||
self.recorder.record_applied(migration.app_label, migration.name)
|
||||
if self.progress_callback:
|
||||
self.progress_callback("apply_success", migration)
|
||||
|
||||
def unapply_migration(self, migration):
|
||||
"""
|
||||
Runs a migration backwards.
|
||||
"""
|
||||
if self.progress_callback:
|
||||
self.progress_callback("unapply_start", migration)
|
||||
with self.connection.schema_editor() as schema_editor:
|
||||
project_state = self.loader.graph.project_state((migration.app_label, migration.name), at_end=False)
|
||||
migration.unapply(project_state, schema_editor)
|
||||
self.recorder.record_unapplied(migration.app_label, migration.name)
|
||||
if self.progress_callback:
|
||||
self.progress_callback("unapply_success", migration)
|
||||
|
||||
@@ -41,6 +41,7 @@ class MigrationLoader(object):
|
||||
Loads the migrations from all INSTALLED_APPS from disk.
|
||||
"""
|
||||
self.disk_migrations = {}
|
||||
self.unmigrated_apps = set()
|
||||
for app in cache.get_apps():
|
||||
# Get the migrations module directory
|
||||
module_name = ".".join(app.__name__.split(".")[:-1] + ["migrations"])
|
||||
@@ -50,7 +51,8 @@ class MigrationLoader(object):
|
||||
except ImportError as e:
|
||||
# I hate doing this, but I don't want to squash other import errors.
|
||||
# Might be better to try a directory check directly.
|
||||
if "No module named migrations" in str(e):
|
||||
if "No module named" in str(e) and "migrations" in str(e):
|
||||
self.unmigrated_apps.add(app_label)
|
||||
continue
|
||||
directory = os.path.dirname(module.__file__)
|
||||
# Scan for .py[c|o] files
|
||||
|
||||
@@ -47,6 +47,9 @@ class Migration(object):
|
||||
def __repr__(self):
|
||||
return "<Migration %s.%s>" % (self.app_label, self.name)
|
||||
|
||||
def __str__(self):
|
||||
return "%s.%s" % (self.app_label, self.name)
|
||||
|
||||
def __hash__(self):
|
||||
return hash("%s.%s" % (self.app_label, self.name))
|
||||
|
||||
|
||||
@@ -86,6 +86,8 @@ PALETTES = {
|
||||
'HTTP_BAD_REQUEST': {},
|
||||
'HTTP_NOT_FOUND': {},
|
||||
'HTTP_SERVER_ERROR': {},
|
||||
'MIGRATE_HEADING': {},
|
||||
'MIGRATE_LABEL': {},
|
||||
},
|
||||
DARK_PALETTE: {
|
||||
'ERROR': { 'fg': 'red', 'opts': ('bold',) },
|
||||
@@ -101,6 +103,8 @@ PALETTES = {
|
||||
'HTTP_BAD_REQUEST': { 'fg': 'red', 'opts': ('bold',) },
|
||||
'HTTP_NOT_FOUND': { 'fg': 'yellow' },
|
||||
'HTTP_SERVER_ERROR': { 'fg': 'magenta', 'opts': ('bold',) },
|
||||
'MIGRATE_HEADING': { 'fg': 'cyan', 'opts': ('bold',) },
|
||||
'MIGRATE_LABEL': { 'opts': ('bold',) },
|
||||
},
|
||||
LIGHT_PALETTE: {
|
||||
'ERROR': { 'fg': 'red', 'opts': ('bold',) },
|
||||
@@ -116,6 +120,8 @@ PALETTES = {
|
||||
'HTTP_BAD_REQUEST': { 'fg': 'red', 'opts': ('bold',) },
|
||||
'HTTP_NOT_FOUND': { 'fg': 'red' },
|
||||
'HTTP_SERVER_ERROR': { 'fg': 'magenta', 'opts': ('bold',) },
|
||||
'MIGRATE_HEADING': { 'fg': 'cyan', 'opts': ('bold',) },
|
||||
'MIGRATE_LABEL': { 'opts': ('bold',) },
|
||||
}
|
||||
}
|
||||
DEFAULT_PALETTE = DARK_PALETTE
|
||||
|
||||
Reference in New Issue
Block a user