From c2e43fff7ab58942692ba03d0c8aa04b0423809f Mon Sep 17 00:00:00 2001 From: snowy Date: Tue, 26 Mar 2024 10:01:26 +0800 Subject: [PATCH] =?UTF-8?q?feat:=20=E6=96=B0=E7=9A=84orm=E6=A1=86=E6=9E=B6?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- liteyuki/utils/data_new.py | 330 +++++++++++++++++++++++++++++++++++++ 1 file changed, 330 insertions(+) create mode 100644 liteyuki/utils/data_new.py diff --git a/liteyuki/utils/data_new.py b/liteyuki/utils/data_new.py new file mode 100644 index 0000000..9f60de0 --- /dev/null +++ b/liteyuki/utils/data_new.py @@ -0,0 +1,330 @@ +import copy +import json +import os +import pickle +import sqlite3 +import types +from types import NoneType +from collections.abc import Iterable +from pydantic import BaseModel, Field +from typing import Any + +LOG_OUT = True + + +def log(*args, **kwargs): + if LOG_OUT: + print(*args, **kwargs) + + +class LiteModel(BaseModel): + TABLE_NAME: str = None + id: int = None + + +class Database: + def __init__(self, db_name: str): + + if os.path.dirname(db_name) != "" and not os.path.exists(os.path.dirname(db_name)): + os.makedirs(os.path.dirname(db_name)) + + self.db_name = db_name + self.conn = sqlite3.connect(db_name) + self.cursor = self.conn.cursor() + + def first(self, model: LiteModel, condition: str, *args: Any, default: Any = None) -> LiteModel | Any | None: + """查询第一个 + Args: + model: 数据模型实例 + condition: 查询条件，不给定则查询所有 + *args: 参数化查询参数 + default: 默认值 + + Returns: + + """ + all_results = self.all(model, condition, *args, default=default) + return all_results[0] if all_results else default + + def all(self, model: LiteModel, condition: str = "", *args: Any, default: Any = None) -> list[LiteModel] | list[Any] | None: + """查询所有 + Args: + model: 数据模型实例 + condition: 查询条件，不给定则查询所有 + *args: 参数化查询参数 + default: 默认值 + + Returns: + + """ + table_name = model.TABLE_NAME + model_type = type(model) + if not table_name: + raise ValueError(f"数据模型{model_type.__name__}未提供表名") + + condition = f"WHERE {condition}" + + results = self.cursor.execute(f"SELECT * FROM {table_name} {condition}", args).fetchall() + fields = [description[0] for description in self.cursor.description] + if not results: + return default + else: + return [model_type(**self._load(dict(zip(fields, result)))) for result in results] + + def upsert(self, *args: LiteModel): + """增/改操作 + Args: + *args: + + Returns: + """ + table_list = [item[0] for item in self.cursor.execute("SELECT name FROM sqlite_master WHERE type='table'").fetchall()] + for model in args: + if not model.TABLE_NAME: + raise ValueError(f"数据模型 {model.__class__.__name__} 未提供表名") + elif model.TABLE_NAME not in table_list: + raise ValueError(f"数据模型 {model.__class__.__name__} 的表 {model.TABLE_NAME} 不存在，请先迁移") + else: + self._save(model.model_dump(by_alias=True)) + + def _save(self, obj: Any) -> Any: + # obj = copy.deepcopy(obj) + if isinstance(obj, dict): + table_name = obj.get("TABLE_NAME") + row_id = obj.get("id") + new_obj = {} + for field, value in obj.items(): + if isinstance(value, self.ITERABLE_TYPE): + new_obj[self._get_stored_field_prefix(value) + field] = self._save(value) # self._save(value) # -> bytes + elif isinstance(value, self.BASIC_TYPE): + new_obj[field] = value + else: + raise ValueError(f"数据模型{table_name}包含不支持的数据类型，字段：{field} 值：{value} 值类型：{type(value)}") + if table_name: + fields, values = [], [] + for n_field, n_value in new_obj.items(): + if n_field not in ["TABLE_NAME", "id"]: + fields.append(n_field) + values.append(n_value) + # 移除TABLE_NAME和id + fields = list(fields) + values = list(values) + if row_id is not None: + # 如果 _id 不为空，将 'id' 插入到字段列表的开始 + fields.insert(0, 'id') + # 将 _id 插入到值列表的开始 + values.insert(0, row_id) + fields = ', '.join([f'"{field}"' for field in fields]) + placeholders = ', '.join('?' for _ in values) + self.cursor.execute(f"INSERT OR REPLACE INTO {table_name}({fields}) VALUES ({placeholders})", tuple(values)) + self.conn.commit() + foreign_id = self.cursor.execute("SELECT last_insert_rowid()").fetchone()[0] + return f"{self.FOREIGN_KEY_PREFIX}{foreign_id}@{table_name}" # -> FOREIGN_KEY_123456@{table_name} id@{table_name} + else: + return pickle.dumps(new_obj) # -> bytes + elif isinstance(obj, (list, set, tuple)): + obj_type = type(obj) # 到时候转回去 + new_obj = [] + for item in obj: + if isinstance(item, self.ITERABLE_TYPE): + new_obj.append(self._save(item)) + elif isinstance(item, self.BASIC_TYPE): + new_obj.append(item) + else: + raise ValueError(f"数据模型包含不支持的数据类型，值：{item} 值类型：{type(item)}") + return pickle.dumps(obj_type(new_obj)) # -> bytes + else: + raise ValueError(f"数据模型包含不支持的数据类型，值：{obj} 值类型：{type(obj)}") + + def _load(self, obj: Any) -> Any: + + if isinstance(obj, dict): + + new_obj = {} + + for field, value in obj.items(): + + field: str + + if field.startswith(self.BYTES_PREFIX): + + new_obj[field.replace(self.BYTES_PREFIX, "")] = self._load(pickle.loads(value)) + + elif field.startswith(self.FOREIGN_KEY_PREFIX): + + new_obj[field.replace(self.FOREIGN_KEY_PREFIX, "")] = self._load(self._get_foreign_data(value)) + + else: + new_obj[field] = value + return new_obj + elif isinstance(obj, (list, set, tuple)): + + print(" - Load as List") + + new_obj = [] + for item in obj: + + print(" - Loading Item", item) + + if isinstance(item, bytes): + + # 对bytes进行尝试解析，解析失败则返回原始bytes + try: + new_obj.append(self._load(pickle.loads(item))) + except Exception as e: + new_obj.append(self._load(item)) + + print(" - Load as Bytes | Result:", new_obj[-1]) + + elif isinstance(item, str) and item.startswith(self.FOREIGN_KEY_PREFIX): + new_obj.append(self._load(self._get_foreign_data(item))) + else: + new_obj.append(self._load(item)) + return new_obj + else: + return obj + + def delete(self, model: LiteModel, condition: str, *args: Any): + pass + + def auto_migrate(self, *args: LiteModel): + + """ + 自动迁移模型 + Args: + *args: 模型类实例化对象，支持空默认值，不支持嵌套迁移 + + Returns: + + """ + for model in args: + if not model.TABLE_NAME: + raise ValueError(f"数据模型{type(model).__name__}未提供表名") + + # 若无则创建表 + self.cursor.execute( + f'CREATE TABLE IF NOT EXISTS "{model.TABLE_NAME}" (id INTEGER PRIMARY KEY AUTOINCREMENT)' + ) + + # 获取表结构,field -> SqliteType + new_structure = {} + for n_field, n_value in model.model_dump(by_alias=True).items(): + if n_field not in ["TABLE_NAME", "id"]: + new_structure[self._get_stored_field_prefix(n_value) + n_field] = self._get_stored_type(n_value) + + # 原有的字段列表 + existing_structure = dict([(column[1], column[2]) for column in self.cursor.execute(f'PRAGMA table_info({model.TABLE_NAME})').fetchall()]) + # 检测缺失字段，由于SQLite是动态类型，所以不需要检测类型 + for n_field, n_type in new_structure.items(): + if n_field not in existing_structure.keys() and n_field.lower() not in ["id", "table_name"]: + self.cursor.execute( + f'ALTER TABLE "{model.TABLE_NAME}" ADD COLUMN "{n_field}" {n_type}' + ) + + # 检测多余字段进行删除 + for e_field in existing_structure.keys(): + if e_field not in new_structure.keys() and e_field.lower() not in ['id']: + self.cursor.execute( + f'ALTER TABLE "{model.TABLE_NAME}" DROP COLUMN "{e_field}"' + ) + + self.conn.commit() + # 已完成 + + def _get_stored_field_prefix(self, value) -> str: + """根据类型获取存储字段前缀，一定在后加上字段名 + * -> "" + Args: + value: 储存的值 + + Returns: + Sqlite3存储字段 + """ + + if isinstance(value, LiteModel) or isinstance(value, dict) and "TABLE_NAME" in value: + return self.FOREIGN_KEY_PREFIX + elif type(value) in self.ITERABLE_TYPE: + return self.BYTES_PREFIX + return "" + + def _get_stored_type(self, value) -> str: + """获取存储类型 + + Args: + value: 储存的值 + + Returns: + Sqlite3存储类型 + """ + if isinstance(value, dict) and "TABLE_NAME" in value: + # 是一个模型字典，储存外键 + return "INTEGER" + return self.TYPE_MAPPING.get(type(value), "TEXT") + + def _get_foreign_data(self, foreign_value: str) -> dict: + """ + 获取外键数据 + Args: + foreign_value: + + Returns: + + """ + foreign_value = foreign_value.replace(self.FOREIGN_KEY_PREFIX, "") + table_name = foreign_value.split("@")[-1] + foreign_id = foreign_value.split("@")[0] + fields = [description[1] for description in self.cursor.execute(f"PRAGMA table_info({table_name})").fetchall()] + result = self.cursor.execute(f"SELECT * FROM {table_name} WHERE id = ?", (foreign_id,)).fetchone() + return dict(zip(fields, result)) + + TYPE_MAPPING = { + int : "INTEGER", + float : "REAL", + str : "TEXT", + bool : "INTEGER", + bytes : "BLOB", + NoneType : "NULL", + # dict : "TEXT", + # list : "TEXT", + # tuple : "TEXT", + # set : "TEXT", + + dict : "BLOB", # LITEYUKIDICT{key_name} + list : "BLOB", # LITEYUKILIST{key_name} + tuple : "BLOB", # LITEYUKITUPLE{key_name} + set : "BLOB", # LITEYUKISET{key_name} + LiteModel: "INTEGER" # FOREIGN_KEY_{table_name} + } + + # 基础类型 + BASIC_TYPE = (int, float, str, bool, bytes, NoneType) + # 可序列化类型 + ITERABLE_TYPE = (dict, list, tuple, set, LiteModel) + + # 外键前缀 + FOREIGN_KEY_PREFIX = "FOREIGN_KEY_" + # 转换为的字节前缀 + BYTES_PREFIX = "PICKLE_BYTES_" + + +def check_sqlite_keyword(name): + sqlite_keywords = [ + "ABORT", "ACTION", "ADD", "AFTER", "ALL", "ALTER", "ANALYZE", "AND", "AS", "ASC", + "ATTACH", "AUTOINCREMENT", "BEFORE", "BEGIN", "BETWEEN", "BY", "CASCADE", "CASE", + "CAST", "CHECK", "COLLATE", "COLUMN", "COMMIT", "CONFLICT", "CONSTRAINT", "CREATE", + "CROSS", "CURRENT_DATE", "CURRENT_TIME", "CURRENT_TIMESTAMP", "DATABASE", "DEFAULT", + "DEFERRABLE", "DEFERRED", "DELETE", "DESC", "DETACH", "DISTINCT", "DROP", "EACH", + "ELSE", "END", "ESCAPE", "EXCEPT", "EXCLUSIVE", "EXISTS", "EXPLAIN", "FAIL", "FOR", + "FOREIGN", "FROM", "FULL", "GLOB", "GROUP", "HAVING", "IF", "IGNORE", "IMMEDIATE", + "IN", "INDEX", "INDEXED", "INITIALLY", "INNER", "INSERT", "INSTEAD", "INTERSECT", + "INTO", "IS", "ISNULL", "JOIN", "KEY", "LEFT", "LIKE", "LIMIT", "MATCH", "NATURAL", + "NO", "NOT", "NOTNULL", "NULL", "OF", "OFFSET", "ON", "OR", "ORDER", "OUTER", "PLAN", + "PRAGMA", "PRIMARY", "QUERY", "RAISE", "RECURSIVE", "REFERENCES", "REGEXP", "REINDEX", + "RELEASE", "RENAME", "REPLACE", "RESTRICT", "RIGHT", "ROLLBACK", "ROW", "SAVEPOINT", + "SELECT", "SET", "TABLE", "TEMP", "TEMPORARY", "THEN", "TO", "TRANSACTION", "TRIGGER", + "UNION", "UNIQUE", "UPDATE", "USING", "VACUUM", "VALUES", "VIEW", "VIRTUAL", "WHEN", + "WHERE", "WITH", "WITHOUT" + ] + return True + # if name.upper() in sqlite_keywords: + # raise ValueError(f"'{name}' 是SQLite保留字，不建议使用，请更换名称")