210 lines
7.2 KiB
Python
210 lines
7.2 KiB
Python
# -*- coding = utf-8 -*-
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# @Time : 2025/2/13 下午12:18
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# @File : crud.py
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# @Software : PyCharm
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# @Author : xingc
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# @Desc :
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from datetime import datetime
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from typing import List, Optional, Union, NewType, Dict, Any, Tuple
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from sqlalchemy import func, desc, delete, CursorResult
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.future import select
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from .models import User, Card, SearchCardCache
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Model = NewType('Model', Union[User, Card, SearchCardCache])
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class CRUD:
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def __init__(self, session: AsyncSession, model: Model):
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self.session = session
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self.model = model
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async def get(self, filters: dict, model: Model = None) -> Optional[Model]:
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model = model or self.model
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result = await self.session.execute(select(model).filter(
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*self.build_filter_conditions(filters, model))
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)
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record = result.scalar_one_or_none()
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return record
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async def get_paginated(
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self, filters: dict, page: int = 1, page_size: int = 10, model: Model = None
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) -> Tuple[List[Model], int]:
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model = model or self.model
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filter_conditions = self.build_filter_conditions(filters, model) if filters else []
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query = select(model).filter(*filter_conditions).order_by(desc(model.created_at))
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total_query = select(func.count()).select_from(model).filter(*filter_conditions)
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total_result = await self.session.execute(total_query)
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total = total_result.scalar()
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query = query.limit(page_size).offset((page - 1) * page_size)
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result = await self.session.execute(query)
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records = result.scalars().all()
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return records, total
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async def get_grouped_count(
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self, group_by_field: str, filters: Dict[str, Any] = None, model: Model = None
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) -> Dict[Any, int]:
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model = model or self.model
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filter_conditions = self.build_filter_conditions(filters, model) if filters else []
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group_by = getattr(model, group_by_field)
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query = select(group_by, func.count()).filter(*filter_conditions).group_by(group_by)
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result = await self.session.execute(query)
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records = result.all()
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return {record[0]: record[1] for record in records}
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async def create(self, data: dict, filters: dict, model: Model = None) -> Union[Model, bool]:
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model = model or self.model
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result = await self.session.execute(select(model).filter(
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*self.build_filter_conditions(filters, model))
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)
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if result.scalars().first() is not None:
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return False
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record = model(**data)
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self.session.add(record)
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await self.session.commit()
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return record
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async def get_all(self, filters: dict = None, model: Model = None) -> List[Model]:
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model = model or self.model
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result = await self.session.execute(
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select(model) if filters is None else select(model).filter(
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*self.build_filter_conditions(filters, model)).order_by(desc(model.insert_time))
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)
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records = result.scalars().all()
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return records
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async def update(self, data: dict, filters: dict, model: Model = None) -> Optional[Model]:
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model = model or self.model
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result = await self.session.execute(select(model).filter(
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*self.build_filter_conditions(filters, model))
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)
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record = result.scalars().first()
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if not record:
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return None
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count = 0
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for key, value in data.items():
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if any([
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value is None,
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value == getattr(record, key),
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key in ['created_at', 'updated_at']
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]):
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continue
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setattr(record, key, value)
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count += 1
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if count > 0:
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await self.session.commit()
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return record
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async def updates(self, data: dict, filters: dict, model: Model = None) -> Optional[Model]:
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model = model or self.model
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result = await self.session.execute(select(model).filter(
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*self.build_filter_conditions(filters, model))
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)
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records = result.scalars().all()
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if len(records) == 0:
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return None
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count = 0
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for record in records:
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for key, value in data.items():
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if any([
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value is None,
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value == getattr(record, key),
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key in ['insert_time', 'update_time']
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]):
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continue
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setattr(record, key, value)
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count += 1
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if count > 0:
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await self.session.commit()
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return records
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async def delete(self, filters: dict, model: Model = None) -> bool:
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model = model or self.model
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result = await self.session.execute(delete(model).filter(
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*self.build_filter_conditions(filters, model))
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)
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await self.session.commit()
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return result.rowcount > 0
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async def deletes(self, filters: dict, model: Model = None) -> bool:
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model = model or self.model
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result = await self.session.execute(delete(model).filter(
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*self.build_filter_conditions(filters, model))
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)
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await self.session.commit()
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return result.rowcount > 0
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async def exists(self, filters: dict, model: Model = None) -> bool:
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model = model or self.model
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result = await self.session.execute(select(model).filter(
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*self.build_filter_conditions(filters, model))
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)
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state = True if result.scalars().first() else False
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return state
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async def total(self, filters: dict, model: Model = None) -> int:
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model = model or self.model
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result = await self.session.execute(select(func.count()).filter(
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*self.build_filter_conditions(filters, model))
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)
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return result.scalar()
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def build_filter_conditions(self, filters: Dict[str, Any], model: Model) -> tuple:
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conditions = []
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for key, value in filters.items():
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if any([
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value is None,
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value == '',
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]):
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continue
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if isinstance(value, datetime) and value.tzinfo is not None:
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value = value.astimezone()
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# 解析字段名和操作符
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field_name, operator = key, None
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if '__' in key:
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field_name, operator = key.split('__', 1)
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else:
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field_name = key
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field = getattr(model, field_name)
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if operator == 'like': # 模糊匹配
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conditions.append(field.like(f'%{value}%'))
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elif operator == 'gt': # 大于
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conditions.append(field > value)
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elif operator == 'lt': # 小于
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conditions.append(field < value)
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elif operator == 'eq': # 等于
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conditions.append(field == value)
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elif operator == 'ne': # 不等于
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conditions.append(field != value)
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elif operator == 'in': # 在集合中
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conditions.append(field.in_(value))
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else:
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# 如果没有匹配的操作符，默认为等于
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conditions.append(field == value)
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return tuple(conditions)
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