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import sqlite3
import os.path
import logging
from ._base import get_data_root_directory
from ..config import config, is_development_mode
def _get_database_path(name: str) -> str:
return os.path.join(
get_data_root_directory(),
f'{name}.db')
class SQLiteBase:
SCHEMA = 1
def __init__(self, name=None, path=None, check_same_thread=False):
if not path:
if not name:
name = config.app_name
database_path = _get_database_path(name)
else:
database_path = path
if not os.path.exists(os.path.dirname(database_path)):
os.makedirs(os.path.dirname(database_path))
self.logger = logging.getLogger(self.__class__.__name__)
self.sqlite = sqlite3.connect(database_path, check_same_thread=check_same_thread)
if is_development_mode():
self.sql_logger = logging.getLogger(self.__class__.__name__)
self.sql_logger.setLevel('TRACE')
self.sqlite.set_trace_callback(self.sql_logger.trace)
sqlite_version = self._get_sqlite_version()
self.logger.debug(f'SQLite version: {sqlite_version}')
schema_version = self.schema_get_version()
self.logger.debug(f'Schema version: {schema_version}')
self.schema_init(schema_version)
self.schema_set_version(self.SCHEMA)
def __del__(self):
if self.sqlite:
self.sqlite.commit()
self.sqlite.close()
def _get_sqlite_version(self) -> str:
cursor = self.sqlite.cursor()
cursor.execute("SELECT sqlite_version()")
return cursor.fetchone()[0]
def schema_get_version(self) -> int:
cursor = self.sqlite.execute('PRAGMA user_version')
return int(cursor.fetchone()[0])
def schema_set_version(self, v) -> None:
self.sqlite.execute('PRAGMA user_version={:d}'.format(v))
self.logger.info(f'Schema set to {v}')
def cursor(self) -> sqlite3.Cursor:
return self.sqlite.cursor()
def commit(self) -> None:
return self.sqlite.commit()
def schema_init(self, version: int) -> None:
raise ValueError(f'{self.__class__.__name__}: must override schema_init')
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