mirror of
https://github.com/Dvorinka/swingmusic-extended.git
synced 2026-06-03 20:13:02 +00:00
cwilvx
93 lines
2.3 KiB
Python
93 lines
2.3 KiB
Python
from typing import Any
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from sqlalchemy import (
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delete,
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func,
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insert,
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select,
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)
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from sqlalchemy.engine import Engine
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from sqlalchemy import event
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from sqlalchemy.orm import DeclarativeBase, MappedAsDataclass, Session
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from app.db.engine import DbEngine
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# Enable foreign key constraints for SQLite
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@event.listens_for(Engine, "connect")
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def set_sqlite_pragma(dbapi_connection, connection_record):
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cursor = dbapi_connection.cursor()
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cursor.execute("PRAGMA foreign_keys=ON")
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cursor.close()
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class DbManager:
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""" """
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def __init__(self, commit: bool = False):
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self.commit = commit
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self.conn = DbEngine.engine.connect()
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with Session(DbEngine.engine) as session:
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session.connection
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def __enter__(self):
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return self.conn.execution_options(preserve_rowcount=True)
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def __exit__(self, exc_type, exc_val, exc_tb):
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if self.commit:
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self.conn.commit()
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self.conn.close()
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class Base(MappedAsDataclass, DeclarativeBase):
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"""
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Base class for all database models.
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It has methods common to all tables. eg. `insert_one`, `insert_many`, `remove_all`, `remove_one`, `all`, `count`.
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"""
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@classmethod
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def execute(cls, stmt: Any, commit: bool = False):
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with DbEngine.manager(commit=commit) as conn:
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return conn.execute(stmt)
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@classmethod
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def insert_many(cls, items: list[dict[str, Any]]):
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"""
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Inserts multiple items into the database.
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"""
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return cls.execute(insert(cls).values(items), commit=True)
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@classmethod
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def insert_one(cls, item: dict[str, Any]):
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"""
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Inserts a single item into the database.
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"""
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return cls.insert_many([item])
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@classmethod
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def remove_all(cls):
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return cls.execute(delete(cls), commit=True)
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@classmethod
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def remove_one(cls, id: int):
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return cls.execute(delete(cls).where(cls.id == id), commit=True)
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@classmethod
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def all(cls):
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return cls.execute(select(cls))
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@classmethod
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def count(cls):
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return cls.execute(select(func.count()).select_from(cls)).scalar()
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def create_all_tables():
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"""
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Creates all the tables that build on the Base class.
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"""
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Base().metadata.create_all(DbEngine.engine)
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