feat: Project通过关联查询出来所有子表审批单记录的金额总和来计算已花费金额以及剩余预算余额

app/model/ProjectModel.py

@@ -1,11 +1,13 @@
 from decimal import Decimal
-from typing import Optional
+from typing import Optional, List
 
-from pydantic import computed_field, PrivateAttr
-from sqlmodel import Field, Relationship
+from pydantic import computed_field
+from sqlalchemy.orm import selectinload
+from sqlmodel import Field, Relationship, select
 
 from app.model.BasicModel import BasicModel
 from app.model.UserModel import UserServiceModel
+from app.utils.create_module_service import create_model_service
 
 
 class ProjectModel(BasicModel, table=True):
@@ -13,12 +15,9 @@ class ProjectModel(BasicModel, table=True):
 
   name: str = Field(default=None, description="项目名称")
   description: str = Field(default=None, description="项目描述")
-  budget: float = Field(default=None, description="项目预算金额")
+  budget: Decimal = Field(default=None, description="项目预算金额")
   version: int = Field(default=None, description="项目版本号")
 
-  spent: Decimal = Field(default=None, description="项目花费金额")
-  balance: Decimal = Field(default=None, description="项目预算余额")
-
   # /*---------------------------------------leader_id-------------------------------------------*/
 
   leader_id: str = Field(
@@ -47,3 +46,52 @@ class ProjectModel(BasicModel, table=True):
   @leader_name.setter
   def leader_name(self, value: Optional[str]) -> None:
     pass
+
+  # /*---------------------------------------approve_list-------------------------------------------*/
+
+  approve_list_relationship: Optional[List["ApproveModel"]] = Relationship(
+    sa_relationship_kwargs={
+      "foreign_keys": "ApproveModel.proj_id",
+      "primaryjoin": "ProjectModel.id == ApproveModel.proj_id",
+    }
+  )
+
+  # /*---------------------------------------spent: 已花费金额-------------------------------------------*/
+  @computed_field
+  @property
+  def spent(self) -> Optional[Decimal]:
+    try:
+      total_amount = Decimal(0)
+      for approve_item in self.approve_list_relationship:
+        if approve_item.status == 'approved':
+          total_amount = total_amount + approve_item.amount
+      return total_amount
+    except:
+      return None
+
+  @spent.setter
+  def spent(self, value: Optional[Decimal]) -> None:
+    pass
+
+  # /*---------------------------------------balance：剩余预算金额-------------------------------------------*/
+  @computed_field
+  @property
+  def balance(self) -> Optional[Decimal]:
+    if self.spent is not None:
+      return self.budget - self.spent
+    else:
+      return None
+
+  @balance.setter
+  def balance(self, value: Optional[Decimal]) -> None:
+    pass
+
+
+ProjectService = create_model_service(
+  Cls=ProjectModel,
+  custom_query=lambda: select(ProjectModel)
+  .options(
+    selectinload(ProjectModel.leader),
+    selectinload(ProjectModel.approve_list_relationship)
+  ),
+)