新增databases.py把所有建表基类统一成一个，才可以链接外键。

main.py

@@ -4,15 +4,19 @@ from scores.main import Scores_API
 from stu_jiuye.main import Shtudent_Jiuye
 from students.main import Students_API
 from Teachers.main import Teachers_API
-
+from databases import *
 app = FastAPI(title="学生管理系统")
 
+Base_all.metadata.create_all(bind=engine_all)
+
 app.include_router(Classes_API,tags=["classes"])
 app.include_router(Scores_API,tags=["scores"])
 app.include_router(Shtudent_Jiuye,tags=["Employments"])
 app.include_router(Students_API,tags=["students"])
 app.include_router(Teachers_API,tags=["teachers"])
 
+
+
 def main():
     print("Hello from student-manage-system!")
 

students/StudentsQuery.sql

@@ -6,7 +6,11 @@ use student_manage_system;
 
 show tables;
 
+drop database  student_manage_system;
+
 drop table students;
 
 select * from students limit 50;
 
+desc students;
+

students/main.py

@@ -5,13 +5,7 @@ from students.model import students_model
 from contextlib import asynccontextmanager
 
 # 合并接口
-@asynccontextmanager
+Students_API = APIRouter()
-async def S_Router(Students_API: APIRouter):
-    Base.metadata.create_all(engine1)
-    yield
-    engine1.dispose()
-
-Students_API = APIRouter(lifespan=S_Router)
 Students_API.include_router(s_api)
 
 # 自测接口