def create(database_name='',
SQLITE_ROOT='',
driver='',
**argv): # @UnusedVariable
"""Create the database specified by the db_dict. If it already exists,
an exception of type DatabaseExistsError will be thrown."""
file_path = _get_filepath(SQLITE_ROOT, database_name, **argv)
# Check whether the database file exists:
if os.path.exists(file_path):
raise weedb.DatabaseExistsError("Database %s already exists" %
(file_path, ))
else:
# If it doesn't exist, create the parent directories
fileDirectory = os.path.dirname(file_path)
if not os.path.exists(fileDirectory):
try:
os.makedirs(fileDirectory)
except OSError:
raise weedb.PermissionError("No permission to create %s" %
fileDirectory)
timeout = to_int(argv.get('timeout', 5))
isolation_level = argv.get('isolation_level')
# Open, then immediately close the database.
connection = sqlite3.connect(file_path,
timeout=timeout,
isolation_level=isolation_level)
connection.close()
def drop(database_name='', SQLITE_ROOT='', driver='', **argv): # @UnusedVariable
file_path = _get_filepath(SQLITE_ROOT, database_name, **argv)
try:
os.remove(file_path)
except OSError as e:
errno = getattr(e, 'errno', 2)
if errno == 13:
raise weedb.PermissionError("No permission to drop database %s" % file_path)
else:
raise weedb.NoDatabaseError("Attempt to drop non-existent database %s" % file_path)
def guarded_fn(*args, **kwargs):
try:
return fn(*args, **kwargs)
except sqlite3.IntegrityError as e:
raise weedb.IntegrityError(e)
except sqlite3.OperationalError as e:
msg = str(e).lower()
if msg.startswith("unable to open"):
raise weedb.PermissionError(e)
elif msg.startswith("no such table"):
raise weedb.NoTableError(e)
elif msg.endswith("already exists"):
raise weedb.TableExistsError(e)
elif msg.startswith("no such column"):
raise weedb.NoColumnError(e)
else:
raise weedb.OperationalError(e)
except sqlite3.ProgrammingError as e:
raise weedb.ProgrammingError(e)
def guard(fn):
"""Decorator function that converts sqlite exceptions into weedb exceptions."""
def guarded_fn(*args, **kwargs):
try:
return fn(*args, **kwargs)
except sqlite3.IntegrityError, e:
raise weedb.IntegrityError(e)
except sqlite3.OperationalError, e:
msg = str(e).lower()
if msg.startswith("unable to open"):
raise weedb.PermissionError(e)
elif msg.startswith("no such table"):
raise weedb.NoTableError(e)
elif msg.endswith("already exists"):
raise weedb.TableExistsError(e)
elif msg.startswith("no such column"):
raise weedb.NoColumnError(e)
else:
raise weedb.OperationalError(e)