peewee 有两种获取 crud 操作对应的 sql 语句的方式:

  • 使用 logging,代理 peewee,以输出日志的方式打印 sql
  • 访问 modelinsert 等类实例的 __str__ 方法

我现在要讲的是后者:

获取插入操作的 sql

def save_record(user_id: int, long_url: str, short_uuid: str) -> InsertResult:
    insert_obj = TinyUrl.insert(
        user_id=user_id,
        long_url=long_url,
        long_url_hash=md5_helper.get_string_md5(long_url),
        short_uuid=short_uuid
    )

    sql = str(insert_obj)
    started_at = time.time()
    row_id = insert_obj.execute()
    ended_at = time.time()

    return InsertResult(
        tracks=[
            DBCrudTrack(
                sql=sql,
                pay_time=ended_at - started_at
            )
        ],
        row_id=row_id
    )

获取查询操作的 sql

def get_row_by_user_id_long_url_hash(user_id: int, long_url_hash: str) -> SelectResult:
    query: ModelSelect = TinyUrl.select().where(
        (TinyUrl.user_id == user_id) &
        (TinyUrl.long_url_hash == long_url_hash)
    )
    sql = str(query)

    start_at = time.time()
    rows: list[dict] = list(
        query.dicts()
    )
    end_at = time.time()

    return SelectResult(
        tracks=[
            DBCrudTrack(
                sql=sql,
                pay_time=end_at - start_at
            )
        ],
        rows=[
            Row(**row)
            for row in rows
        ]
    )

universe_king
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