from typing import Any from fastapi import UploadFile from sqlalchemy.ext.asyncio import AsyncSession from app.core.base_schema import AuthSchema, PageResultSchema from app.core.exceptions import CustomException from app.core.logger import logger from app.utils.common_util import search_to_dict from app.utils.excel_util import ExcelUtil from .crud import BreedingGroupCRUD from .schema import ( GroupCreateSchema, GroupOutSchema, GroupQueryParam, GroupUpdateSchema, ) def _is_blank(v: Any) -> bool: return v is None or (isinstance(v, str) and v.strip() == "") def _none_if_blank(v: Any) -> Any: if _is_blank(v): return None return str(v).strip() if isinstance(v, str) else v def _to_float(v: Any) -> float | None: if _is_blank(v): return None try: return float(v) except (TypeError, ValueError): return None def _to_int(v: Any) -> int | None: if _is_blank(v): return None try: return int(float(v)) except (TypeError, ValueError): return None class GroupService: """分组管理 模块服务层""" def __init__(self, auth: AuthSchema, db: AsyncSession) -> None: self.auth = auth self.db = db async def _attach_fk_labels(self, items: list[GroupOutSchema]) -> None: if not items: return crud = BreedingGroupCRUD(self.auth, self.db) async def detail(self, id: int) -> GroupOutSchema: obj = await BreedingGroupCRUD(self.auth, self.db).get(id=id) if not obj: raise CustomException(msg="该分组管理不存在") out = GroupOutSchema.model_validate(obj) await self._attach_fk_labels([out]) return out async def get_list( self, search: GroupQueryParam | None = None, order_by: list[dict[str, str]] | None = None, ) -> list[GroupOutSchema]: obj_list = await BreedingGroupCRUD(self.auth, self.db).get_list( search=search_to_dict(search), order_by=order_by ) outs = [GroupOutSchema.model_validate(obj) for obj in obj_list] await self._attach_fk_labels(outs) return outs async def page( self, page_no: int, page_size: int, search: GroupQueryParam | None = None, order_by: list[dict[str, str]] | None = None, ) -> PageResultSchema[GroupOutSchema]: offset = (page_no - 1) * page_size result = await BreedingGroupCRUD(self.auth, self.db).page( offset=offset, limit=page_size, order_by=order_by or [{"id": "asc"}], search=search_to_dict(search, {}), out_schema=GroupOutSchema, ) await self._attach_fk_labels(result.items) return result async def create(self, data: GroupCreateSchema) -> GroupOutSchema: obj = await BreedingGroupCRUD(self.auth, self.db).create(data=data) out = GroupOutSchema.model_validate(obj) return out async def update(self, id: int, data: GroupUpdateSchema) -> GroupOutSchema: obj = await BreedingGroupCRUD(self.auth, self.db).get(id=id) if not obj: raise CustomException(msg="更新失败，该分组管理不存在") obj = await BreedingGroupCRUD(self.auth, self.db).update(id=id, data=data) out = GroupOutSchema.model_validate(obj) return out async def delete(self, ids: list[int]) -> None: if not ids: raise CustomException(msg="删除失败，删除对象不能为空") objs = await BreedingGroupCRUD(self.auth, self.db).get_list(search={"id": ("in", ids)}) obj_map = {o.id: o for o in objs} for id_ in ids: if id_ not in obj_map: raise CustomException(msg="删除失败，该分组管理不存在") await BreedingGroupCRUD(self.auth, self.db).delete(ids=ids) async def list_options(self) -> list[dict[str, Any]]: """供前端下拉选择使用：返回 [{value, label}]。""" obj_list = await BreedingGroupCRUD(self.auth, self.db).get_list(order_by=[{"id": "asc"}]) return [{"value": o.id, "label": o.group_name} for o in obj_list] @staticmethod def batch_export(obj_list: list[dict[str, Any]]) -> bytes: mapping_dict = { "group_name": "分组名称", "group_type": "分组类型", "remark": "备注", "created_time": "创建时间", "created_by": "创建者", } data = [dict(item) for item in obj_list] for item in data: creator = item.get("created_by") item["created_by"] = creator.get("name", "未知") if isinstance(creator, dict) else "未知" return ExcelUtil.export_list2excel(list_data=data, mapping_dict=mapping_dict) async def batch_import(self, file: UploadFile, update_support: bool = False) -> str: header_dict = { "分组名称": "group_name", "分组类型": "group_type", "备注": "remark", } try: contents = await file.read() rows = ExcelUtil.read_excel_to_dicts(contents) await file.close() if not rows: raise CustomException(msg="导入文件为空") missing_headers = [h for h in header_dict if h not in rows[0]] if missing_headers: raise CustomException(msg=f"导入文件缺少必要的列: {', '.join(missing_headers)}") mapped_rows = [] for row in rows: mapped_rows.append({en: row.get(ch) for ch, en in header_dict.items()}) required_fields = ["group_name"] errors = [] for field in required_fields: missing_indices = [i + 1 for i, r in enumerate(mapped_rows) if _is_blank(r.get(field))] if missing_indices: field_name = next(k for k, v in header_dict.items() if v == field) rows_str = "、".join(str(i) for i in missing_indices) errors.append(f"{field_name}不能为空，第{rows_str}行") if errors: raise CustomException(msg=f"导入失败，以下行缺少必要字段：\n{'; '.join(errors)}") error_msgs: list[str] = [] success_count = 0 crud = BreedingGroupCRUD(self.auth, self.db) for i, row in enumerate(mapped_rows, start=1): try: fields = { "group_name": _none_if_blank(row.get("group_name")), "group_type": _none_if_blank(row.get("group_type")), "remark": _none_if_blank(row.get("remark")), } create_data = GroupCreateSchema(**fields) await crud.create(data=create_data) success_count += 1 except Exception as e: error_msgs.append(f"第{i}行: {e!s}") continue result = f"成功导入 {success_count} 条数据" if error_msgs: result += "\n错误信息:\n" + "\n".join(error_msgs) return result except Exception as e: logger.error(f"批量导入分组管理失败: {e!s}") raise CustomException(msg=f"导入失败: {e!s}") @staticmethod def import_template_download() -> bytes: header_list = [ "分组名称", "分组类型", "备注", ] selector_header_list = [] option_list = [ ] return ExcelUtil.get_excel_template( header_list=header_list, selector_header_list=selector_header_list, option_list=option_list, )