|
|
from typing import Union, Type, List, Any, TypeVar, Generic, Callable, Coroutine, Optional
|
|
|
|
|
|
from fastapi_pagination import Params
|
|
|
from fastapi_pagination.ext.sqlalchemy import paginate
|
|
|
from pydantic import BaseModel
|
|
|
from sqlalchemy import func
|
|
|
from sqlalchemy.ext.asyncio import AsyncSession
|
|
|
from sqlmodel import SQLModel
|
|
|
|
|
|
from core.global_context import current_session
|
|
|
from entity import DbBaseModel
|
|
|
from entity.dto.base import BasePageQueryReq, BasePageResp, BaseQueryReq
|
|
|
from utils import get_uuid
|
|
|
|
|
|
"""
|
|
|
session.execute： 执行任意数据库操作语句，返回结果需要额外处理获取 数据形式：Row对象（类似元组）
|
|
|
-- exec_result.scalars().all(): 从session.execute的执行结果中获取全部的数据
|
|
|
session.scalars: 只适合单模型查询（不适合指定列或连表查询），返回结果需要处理 数据形式：直接返回模型实例（如User对象）
|
|
|
-- 处理exec_result.all(): 从session.scalars的执行结果中获取全部的数据
|
|
|
session.scalar: 直接明确获取一条数据，可以直接返回，无需额外处理
|
|
|
|
|
|
"""
|
|
|
T = TypeVar('T', bound=DbBaseModel)
|
|
|
|
|
|
class BaseService(Generic[T]):
|
|
|
model: Type[T] # 子类必须指定模型
|
|
|
|
|
|
@classmethod
|
|
|
def get_db(cls) -> AsyncSession:
|
|
|
"""获取当前请求的会话"""
|
|
|
session = current_session.get()
|
|
|
if session is None:
|
|
|
raise RuntimeError("No database session in context. "
|
|
|
"Make sure to use this service within a request context.")
|
|
|
return session
|
|
|
|
|
|
@classmethod
|
|
|
def get_query_stmt(cls, query_params, sessions=None, *, fields: list = None):
|
|
|
if sessions is None:
|
|
|
if fields:
|
|
|
sessions = cls.model.select(*fields)
|
|
|
else:
|
|
|
sessions = cls.model.select()
|
|
|
for key, value in query_params.items():
|
|
|
if hasattr(cls.model, key) and value is not None:
|
|
|
field = getattr(cls.model, key)
|
|
|
sessions = sessions.where(field == value)
|
|
|
return sessions
|
|
|
|
|
|
@classmethod
|
|
|
def entity_conversion_dto(cls, entity_data: Union[list, BaseModel], dto: Type[BaseModel]) -> Union[
|
|
|
BaseModel, List[BaseModel]]:
|
|
|
dto_list = []
|
|
|
if not isinstance(entity_data, list):
|
|
|
return dto(**entity_data.model_dump())
|
|
|
for entity in entity_data:
|
|
|
temp = entity
|
|
|
if not isinstance(entity, dict):
|
|
|
temp = entity.to_dict()
|
|
|
dto_list.append(dto(**temp))
|
|
|
return dto_list
|
|
|
|
|
|
@classmethod
|
|
|
def check_base_permission(cls, daba: Any):
|
|
|
# todo
|
|
|
pass
|
|
|
|
|
|
@classmethod
|
|
|
async def get_by_page(cls, query_params: Union[dict, BasePageQueryReq])->BasePageResp:
|
|
|
if not isinstance(query_params, dict):
|
|
|
query_params = query_params.model_dump()
|
|
|
query_params = {k: v for k, v in query_params.items() if v is not None}
|
|
|
query_stmt = cls.get_query_stmt(query_params)
|
|
|
return await cls.auto_page(query_stmt, query_params)
|
|
|
|
|
|
@classmethod
|
|
|
async def auto_page(cls, query_stmt, query_params: Union[dict, BasePageQueryReq] = None,
|
|
|
dto_model_class: Type[BaseModel] = None)->BasePageResp:
|
|
|
if not query_params:
|
|
|
query_params = {}
|
|
|
if not isinstance(query_params, dict):
|
|
|
query_params = query_params.model_dump()
|
|
|
page_number = query_params.get("page_number", 1)
|
|
|
page_size = query_params.get("page_size", 12)
|
|
|
desc = query_params.get("desc", "desc")
|
|
|
orderby = query_params.get("orderby", "created_time")
|
|
|
session = cls.get_db()
|
|
|
data_count = None
|
|
|
if data_count == 0:
|
|
|
return BasePageResp(**{
|
|
|
"page_number": page_number,
|
|
|
"page_size": page_size,
|
|
|
"count": data_count,
|
|
|
"desc": desc,
|
|
|
"orderby": orderby,
|
|
|
"data": [],
|
|
|
})
|
|
|
if desc == "desc":
|
|
|
query_stmt = query_stmt.order_by(getattr(cls.model, orderby).desc())
|
|
|
else:
|
|
|
query_stmt = query_stmt.order_by(getattr(cls.model, orderby).asc())
|
|
|
query_page_result = await paginate(session,
|
|
|
query_stmt,
|
|
|
Params(page=page_number, size=page_size))
|
|
|
result = query_page_result.items
|
|
|
if dto_model_class is not None:
|
|
|
result = [dto_model_class(**item) for item in result]
|
|
|
return BasePageResp(**{
|
|
|
"page_number": page_number,
|
|
|
"page_size": page_size,
|
|
|
"page_count": query_page_result.pages,
|
|
|
"count": query_page_result.total,
|
|
|
"desc": desc,
|
|
|
"orderby": orderby,
|
|
|
"data": result,
|
|
|
})
|
|
|
|
|
|
@classmethod
|
|
|
async def get_list(cls, query_params: Union[dict, BaseQueryReq])->List[T]:
|
|
|
if not isinstance(query_params, dict):
|
|
|
query_params = query_params.model_dump()
|
|
|
query_params = {k: v for k, v in query_params.items() if v is not None}
|
|
|
desc = query_params.get("desc", "desc")
|
|
|
orderby = query_params.get("orderby", "created_time")
|
|
|
query_stmt = cls.get_query_stmt(query_params)
|
|
|
field = getattr(cls.model, orderby)
|
|
|
if desc == "desc":
|
|
|
query_stmt = query_stmt.order_by(field.desc())
|
|
|
else:
|
|
|
query_stmt = query_stmt.order_by(field.asc())
|
|
|
session = cls.get_db()
|
|
|
exec_result = await session.execute(query_stmt)
|
|
|
return list(exec_result.scalars().all())
|
|
|
|
|
|
@classmethod
|
|
|
async def get_id_list(cls, query_params: Union[dict, BaseQueryReq]) -> List[str]:
|
|
|
if not isinstance(query_params, dict):
|
|
|
query_params = query_params.model_dump()
|
|
|
query_params = {k: v for k, v in query_params.items() if v is not None}
|
|
|
desc = query_params.get("desc", "desc")
|
|
|
orderby = query_params.get("orderby", "created_time")
|
|
|
query_stmt = cls.model.select(cls.model.id)
|
|
|
query_stmt = cls.get_query_stmt(query_params, query_stmt)
|
|
|
if desc == "desc":
|
|
|
query_stmt = query_stmt.order_by(cls.model.getter_by(orderby).desc())
|
|
|
else:
|
|
|
query_stmt = query_stmt.order_by(cls.model.getter_by(orderby).asc())
|
|
|
session = cls.get_db()
|
|
|
exec_result = await session.execute(query_stmt)
|
|
|
return [item["id"] for item in exec_result.scalars().all()]
|
|
|
|
|
|
@classmethod
|
|
|
async def save(cls, **kwargs)->T:
|
|
|
sample_obj = cls.model(**kwargs)
|
|
|
session = cls.get_db()
|
|
|
session.add(sample_obj)
|
|
|
await session.flush()
|
|
|
return sample_obj
|
|
|
|
|
|
@classmethod
|
|
|
async def insert_many(cls, data_list, batch_size=100)->None:
|
|
|
async with cls.get_db() as session:
|
|
|
for d in data_list:
|
|
|
if not d.get("id", None):
|
|
|
d["id"] = get_uuid()
|
|
|
|
|
|
for i in range(0, len(data_list), batch_size):
|
|
|
session.add_all(data_list[i: i + batch_size])
|
|
|
|
|
|
@classmethod
|
|
|
async def update_by_id(cls, pid, data)-> int:
|
|
|
update_stmt = cls.model.update().where(cls.model.id == pid).values(**data)
|
|
|
session = cls.get_db()
|
|
|
result = await session.execute(update_stmt)
|
|
|
return result.rowcount()
|
|
|
|
|
|
@classmethod
|
|
|
async def update_many_by_id(cls, data_list)->None:
|
|
|
async with cls.get_db() as session:
|
|
|
for data in data_list:
|
|
|
stmt = cls.model.update().where(cls.model.id == data["id"]).values(**data)
|
|
|
await session.execute(stmt)
|
|
|
|
|
|
@classmethod
|
|
|
async def get_by_id(cls, pid)->T:
|
|
|
stmt = cls.model.select(cls.model.id == pid)
|
|
|
session = cls.get_db()
|
|
|
return await session.scalar(stmt)
|
|
|
|
|
|
@classmethod
|
|
|
async def get_by_ids(cls, pids, cols=None)->List[T]:
|
|
|
if cols:
|
|
|
objs = cls.model.select(*cols)
|
|
|
else:
|
|
|
objs = cls.model.select()
|
|
|
stmt = objs.where(cls.model.id.in_(pids))
|
|
|
session = cls.get_db()
|
|
|
result = await session.scalars(stmt)
|
|
|
return list(result.all())
|
|
|
|
|
|
@classmethod
|
|
|
async def delete_by_id(cls, pid)-> int:
|
|
|
del_stmt = cls.model.delete().where(cls.model.id == pid)
|
|
|
session = cls.get_db()
|
|
|
exec_result = await session.execute(del_stmt)
|
|
|
return exec_result.rowcount()
|
|
|
|
|
|
@classmethod
|
|
|
async def delete_by_ids(cls, pids)-> int:
|
|
|
session = cls.get_db()
|
|
|
del_stmt = cls.model.delete().where(cls.model.id.in_(pids))
|
|
|
result = await session.execute(del_stmt)
|
|
|
return result.rowcount()
|
|
|
|
|
|
@classmethod
|
|
|
async def get_data_count(cls, query_params: dict = None) -> int:
|
|
|
if not query_params:
|
|
|
raise Exception("参数为空")
|
|
|
stmt = cls.get_query_stmt(query_params, fields=[func.count(cls.model.id)])
|
|
|
# stmt = cls.get_query_stmt(query_params)
|
|
|
session = cls.get_db()
|
|
|
return await session.scalar(stmt)
|
|
|
|
|
|
@classmethod
|
|
|
async def is_exist(cls, query_params: dict = None) -> bool:
|
|
|
return await cls.get_data_count(query_params) > 0
|