160 lines
6.7 KiB
Python
160 lines
6.7 KiB
Python
import multiprocessing
|
|
import os
|
|
import shutil
|
|
import sqlite3
|
|
import sys
|
|
from pathlib import Path
|
|
|
|
from django.db import NotSupportedError
|
|
from django.db.backends.base.creation import BaseDatabaseCreation
|
|
|
|
|
|
class DatabaseCreation(BaseDatabaseCreation):
|
|
@staticmethod
|
|
def is_in_memory_db(database_name):
|
|
return not isinstance(database_name, Path) and (
|
|
database_name == ":memory:" or "mode=memory" in database_name
|
|
)
|
|
|
|
def _get_test_db_name(self):
|
|
test_database_name = self.connection.settings_dict["TEST"]["NAME"] or ":memory:"
|
|
if test_database_name == ":memory:":
|
|
return "file:memorydb_%s?mode=memory&cache=shared" % self.connection.alias
|
|
return test_database_name
|
|
|
|
def _create_test_db(self, verbosity, autoclobber, keepdb=False):
|
|
test_database_name = self._get_test_db_name()
|
|
|
|
if keepdb:
|
|
return test_database_name
|
|
if not self.is_in_memory_db(test_database_name):
|
|
# Erase the old test database
|
|
if verbosity >= 1:
|
|
self.log(
|
|
"Destroying old test database for alias %s..."
|
|
% (self._get_database_display_str(verbosity, test_database_name),)
|
|
)
|
|
if os.access(test_database_name, os.F_OK):
|
|
if not autoclobber:
|
|
confirm = input(
|
|
"Type 'yes' if you would like to try deleting the test "
|
|
"database '%s', or 'no' to cancel: " % test_database_name
|
|
)
|
|
if autoclobber or confirm == "yes":
|
|
try:
|
|
os.remove(test_database_name)
|
|
except Exception as e:
|
|
self.log("Got an error deleting the old test database: %s" % e)
|
|
sys.exit(2)
|
|
else:
|
|
self.log("Tests cancelled.")
|
|
sys.exit(1)
|
|
return test_database_name
|
|
|
|
def get_test_db_clone_settings(self, suffix):
|
|
orig_settings_dict = self.connection.settings_dict
|
|
source_database_name = orig_settings_dict["NAME"]
|
|
|
|
if not self.is_in_memory_db(source_database_name):
|
|
root, ext = os.path.splitext(source_database_name)
|
|
return {**orig_settings_dict, "NAME": f"{root}_{suffix}{ext}"}
|
|
|
|
start_method = multiprocessing.get_start_method()
|
|
if start_method == "fork":
|
|
return orig_settings_dict
|
|
if start_method == "spawn":
|
|
return {
|
|
**orig_settings_dict,
|
|
"NAME": f"{self.connection.alias}_{suffix}.sqlite3",
|
|
}
|
|
raise NotSupportedError(
|
|
f"Cloning with start method {start_method!r} is not supported."
|
|
)
|
|
|
|
def _clone_test_db(self, suffix, verbosity, keepdb=False):
|
|
source_database_name = self.connection.settings_dict["NAME"]
|
|
target_database_name = self.get_test_db_clone_settings(suffix)["NAME"]
|
|
if not self.is_in_memory_db(source_database_name):
|
|
# Erase the old test database
|
|
if os.access(target_database_name, os.F_OK):
|
|
if keepdb:
|
|
return
|
|
if verbosity >= 1:
|
|
self.log(
|
|
"Destroying old test database for alias %s..."
|
|
% (
|
|
self._get_database_display_str(
|
|
verbosity, target_database_name
|
|
),
|
|
)
|
|
)
|
|
try:
|
|
os.remove(target_database_name)
|
|
except Exception as e:
|
|
self.log("Got an error deleting the old test database: %s" % e)
|
|
sys.exit(2)
|
|
try:
|
|
shutil.copy(source_database_name, target_database_name)
|
|
except Exception as e:
|
|
self.log("Got an error cloning the test database: %s" % e)
|
|
sys.exit(2)
|
|
# Forking automatically makes a copy of an in-memory database.
|
|
# Spawn requires migrating to disk which will be re-opened in
|
|
# setup_worker_connection.
|
|
elif multiprocessing.get_start_method() == "spawn":
|
|
ondisk_db = sqlite3.connect(target_database_name, uri=True)
|
|
self.connection.connection.backup(ondisk_db)
|
|
ondisk_db.close()
|
|
|
|
def _destroy_test_db(self, test_database_name, verbosity):
|
|
if test_database_name and not self.is_in_memory_db(test_database_name):
|
|
# Remove the SQLite database file
|
|
os.remove(test_database_name)
|
|
|
|
def test_db_signature(self):
|
|
"""
|
|
Return a tuple that uniquely identifies a test database.
|
|
|
|
This takes into account the special cases of ":memory:" and "" for
|
|
SQLite since the databases will be distinct despite having the same
|
|
TEST NAME. See https://www.sqlite.org/inmemorydb.html
|
|
"""
|
|
test_database_name = self._get_test_db_name()
|
|
sig = [self.connection.settings_dict["NAME"]]
|
|
if self.is_in_memory_db(test_database_name):
|
|
sig.append(self.connection.alias)
|
|
else:
|
|
sig.append(test_database_name)
|
|
return tuple(sig)
|
|
|
|
def setup_worker_connection(self, _worker_id):
|
|
settings_dict = self.get_test_db_clone_settings(_worker_id)
|
|
# connection.settings_dict must be updated in place for changes to be
|
|
# reflected in django.db.connections. Otherwise new threads would
|
|
# connect to the default database instead of the appropriate clone.
|
|
start_method = multiprocessing.get_start_method()
|
|
if start_method == "fork":
|
|
# Update settings_dict in place.
|
|
self.connection.settings_dict.update(settings_dict)
|
|
self.connection.close()
|
|
elif start_method == "spawn":
|
|
alias = self.connection.alias
|
|
connection_str = (
|
|
f"file:memorydb_{alias}_{_worker_id}?mode=memory&cache=shared"
|
|
)
|
|
source_db = self.connection.Database.connect(
|
|
f"file:{alias}_{_worker_id}.sqlite3", uri=True
|
|
)
|
|
target_db = sqlite3.connect(connection_str, uri=True)
|
|
source_db.backup(target_db)
|
|
source_db.close()
|
|
# Update settings_dict in place.
|
|
self.connection.settings_dict.update(settings_dict)
|
|
self.connection.settings_dict["NAME"] = connection_str
|
|
# Re-open connection to in-memory database before closing copy
|
|
# connection.
|
|
self.connection.connect()
|
|
target_db.close()
|
|
if os.environ.get("RUNNING_DJANGOS_TEST_SUITE") == "true":
|
|
self.mark_expected_failures_and_skips()
|