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108 lines
4.4 KiB
108 lines
4.4 KiB
import os
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import shutil
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import sys
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from pathlib import Path
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from django.db.backends.base.creation import BaseDatabaseCreation
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class DatabaseCreation(BaseDatabaseCreation):
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@staticmethod
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def is_in_memory_db(database_name):
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return not isinstance(database_name, Path) and (
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database_name == ":memory:" or "mode=memory" in database_name
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)
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def _get_test_db_name(self):
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test_database_name = self.connection.settings_dict["TEST"]["NAME"] or ":memory:"
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if test_database_name == ":memory:":
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return "file:memorydb_%s?mode=memory&cache=shared" % self.connection.alias
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return test_database_name
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def _create_test_db(self, verbosity, autoclobber, keepdb=False):
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test_database_name = self._get_test_db_name()
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if keepdb:
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return test_database_name
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if not self.is_in_memory_db(test_database_name):
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# Erase the old test database
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if verbosity >= 1:
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self.log(
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"Destroying old test database for alias %s..."
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% (self._get_database_display_str(verbosity, test_database_name),)
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)
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if os.access(test_database_name, os.F_OK):
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if not autoclobber:
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confirm = input(
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"Type 'yes' if you would like to try deleting the test "
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"database '%s', or 'no' to cancel: " % test_database_name
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)
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if autoclobber or confirm == "yes":
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try:
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os.remove(test_database_name)
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except Exception as e:
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self.log("Got an error deleting the old test database: %s" % e)
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sys.exit(2)
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else:
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self.log("Tests cancelled.")
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sys.exit(1)
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return test_database_name
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def get_test_db_clone_settings(self, suffix):
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orig_settings_dict = self.connection.settings_dict
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source_database_name = orig_settings_dict["NAME"]
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if self.is_in_memory_db(source_database_name):
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return orig_settings_dict
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else:
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root, ext = os.path.splitext(orig_settings_dict["NAME"])
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return {**orig_settings_dict, "NAME": "{}_{}{}".format(root, suffix, ext)}
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def _clone_test_db(self, suffix, verbosity, keepdb=False):
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source_database_name = self.connection.settings_dict["NAME"]
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target_database_name = self.get_test_db_clone_settings(suffix)["NAME"]
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# Forking automatically makes a copy of an in-memory database.
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if not self.is_in_memory_db(source_database_name):
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# Erase the old test database
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if os.access(target_database_name, os.F_OK):
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if keepdb:
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return
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if verbosity >= 1:
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self.log(
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"Destroying old test database for alias %s..."
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% (
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self._get_database_display_str(
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verbosity, target_database_name
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),
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)
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)
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try:
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os.remove(target_database_name)
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except Exception as e:
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self.log("Got an error deleting the old test database: %s" % e)
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sys.exit(2)
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try:
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shutil.copy(source_database_name, target_database_name)
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except Exception as e:
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self.log("Got an error cloning the test database: %s" % e)
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sys.exit(2)
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def _destroy_test_db(self, test_database_name, verbosity):
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if test_database_name and not self.is_in_memory_db(test_database_name):
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# Remove the SQLite database file
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os.remove(test_database_name)
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def test_db_signature(self):
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"""
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Return a tuple that uniquely identifies a test database.
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This takes into account the special cases of ":memory:" and "" for
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SQLite since the databases will be distinct despite having the same
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TEST NAME. See https://www.sqlite.org/inmemorydb.html
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"""
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test_database_name = self._get_test_db_name()
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sig = [self.connection.settings_dict["NAME"]]
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if self.is_in_memory_db(test_database_name):
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sig.append(self.connection.alias)
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else:
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sig.append(test_database_name)
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return tuple(sig)
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