完善相关问题，并增加推理的部分代码

app/model/crud/project_image_crud.py

@@ -1,9 +1,10 @@
 from sqlalchemy.orm import Session
-from sqlalchemy import asc
+from sqlalchemy import asc, func
 from typing import List
+from fastapi.encoders import jsonable_encoder
 
-from app.model.bussiness_model import ProjectImage as piModel
-from app.model.schemas.project_image_schemas import ProjectImage, ProjectImagePager
+from app.model.bussiness_model import ProjectImage as piModel, ProjectImgLabel
+from app.model.schemas.project_image_schemas import ProjectImage, ProjectImagePager, ProjectImageOut
 from app.db.page_util import get_pager
 
 
@@ -14,6 +15,35 @@ def get_image_pager(image: ProjectImagePager, session: Session):
     return pager
 
 
+def get_image_pager2(image: ProjectImage, session: Session):
+    # 1 子查询
+    subquery = (
+        session.query(
+            ProjectImgLabel.image_id,
+            func.ifnull(func.count(ProjectImgLabel.id), 0).label('label_count')
+        )
+        .group_by(ProjectImgLabel.image_id)
+        .subquery()
+    )
+    # 2 主查询
+    query = (
+        session.query(
+            piModel,
+            func.ifnull(subquery.c.label_count, 0).label('label_count')
+        )
+        .outerjoin(subquery, piModel.id == subquery.c.image_id)
+    )
+    query = query.filter(piModel.project_id == image.project_id).order_by(asc(piModel.id))
+    pager = get_pager(query, image.pagerNum, image.pagerSize)
+    datas = []
+    for result in pager.data:
+        data = ProjectImageOut.from_orm(result[0])
+        data.label_count = result[1]
+        datas.append(data)
+    pager.data = jsonable_encoder(datas)
+    return pager
+
+
 def check_img_name(project_id: int, file_name: str, session: Session):
     """
     根据项目id和文件名称进行查重