ahvn.cache.db_cache module

Database-based cache backend.

class ahvn.cache.db_cache.DatabaseCache(provider=None, database=None, exclude=None, *args, **kwargs)

基类：BaseCache

An implementation of BaseCache that stores data in a database table using JSON columns. Each cache entry is stored as a row with a string key and JSON data using the CacheORMEntity model.

参数:

• provider (str)

• database (str)

• exclude (Iterable[str] | None)

__init__(provider=None, database=None, exclude=None, *args, **kwargs)

Initialization.

参数:

• provider (str) -- Database provider ('sqlite', 'pg', 'duckdb', etc.).

• database (str) -- Database name or path (':memory:' for in-memory).

• exclude (Optional[Iterable[str]]) -- Keys to exclude from inputs when creating cache entries.

• *args -- Additional positional arguments.

• **kwargs -- Additional keyword arguments for database connection.

__len__()

Get the number of cache entries.

返回:

The number of entries in the cache.

返回类型:

int

抛出:

DatabaseError -- If the count is not correctly returned from SQL.

close()

Close the database connection.