新增databases.py把所有建表基类统一成一个，才可以链接外键。

.env

@@ -1,7 +1,7 @@
 # .env（放项目根目录，每个人自己建，不提交 Git）
     # 用来修改数据库账户密码
 DB_USER=root
-DB_PASSWORD=
+DB_PASSWORD=420821
 DB_HOST=localhost
 DB_PORT=3306
 DB_NAME=student_manage_system

Teachers/model/tea_model.py

@@ -1,3 +1,4 @@
+from databases import engine_all,Base_all,Session
 from Teachers.database import *
 from datetime import datetime
 from sqlalchemy import *
@@ -7,7 +8,7 @@ class Gender(str,enum.Enum):
     m = '男'
     f = '女'
 
-class Tea(Base):
+class Tea(Base_all):
     __tablename__ = 'teachers'
     id = Column(Integer
                     , primary_key=True

class_management/model/class_management_model.py

@@ -1,9 +1,10 @@
+from databases import engine_all,Base_all,Session
 from sqlalchemy import Column, Integer, String, Date, ForeignKey
 from sqlalchemy.dialects.mysql import DATETIME
 from datetime import datetime
 from class_management.database import Base
 
-class ClassInfo(Base):
+class ClassInfo(Base_all):
     __tablename__ = 'classes'
 
     id = Column(Integer

databases.py

@@ -0,0 +1,35 @@
+# databases链接数据库
+
+from sqlalchemy import *
+from sqlalchemy.orm import sessionmaker,declarative_base
+
+# 导入.env参数
+import os
+from dotenv import load_dotenv
+load_dotenv( )
+DB_USER = os.getenv("DB_USER", "root")
+DB_PASSWORD = os.getenv("DB_PASSWORD", "")
+DB_HOST = os.getenv("DB_HOST", "localhost")
+DB_PORT = os.getenv("DB_PORT", "3306")
+DB_NAME = os.getenv("DB_NAME", "student_manage_system")
+
+db_url = f"mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}?charset=utf8mb4"
+
+engine_all = create_engine(db_url)
+
+Base_all = declarative_base()
+
+Session = sessionmaker(bind=engine_all
+                               ,autoflush=False
+                               ,autocommit=False)
+
+def get_db():
+    db = Session()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+
+

main.py

@@ -20,3 +20,8 @@ def main():
 if __name__ == "__main__":
     import uvicorn
     uvicorn.run("main:app", host="0.0.0.0", port=59000)
+    """
+    IPv4 地址 . . . . . . . . . . . . : 192.168.6.40
+    子网掩码  . . . . . . . . . . . . : 255.255.255.0
+    默认网关. . . . . . . . . . . . . : 192.168.6.1
+    """

scores/model/score_model.py

@@ -1,7 +1,8 @@
+from databases import engine_all,Base_all,Session
 from scores.database import Base
 from datetime import datetime
 from sqlalchemy import DateTime,Column,Integer,String,Float
-class Score(Base):
+class Score(Base_all):
     __tablename__='scores'
     id = Column(Integer
                  ,primary_key = True

stu_jiuye/model.py

@@ -1,3 +1,4 @@
+from databases import engine_all,Base_all,Session
 from sqlalchemy import ForeignKey
 
 from stu_jiuye.database import DATETIME,Base,Column,Integer,String,DATE
@@ -30,7 +31,7 @@ from datetime import datetime
 #                           )
 
 
-class Employments(Base):                                            #学生就业信息基类
+class Employments(Base_all):                                            #学生就业信息基类
     __tablename__ = 'Employments'                                   #表名
     id = Column(Integer                                         #主键，自增主键
                 , primary_key=True
@@ -68,7 +69,7 @@ class Employments(Base):                                            #学生就
                           )
     is_deleted = Column(Integer, default=0)                     #是否为删除信息，默认为0
 
-class Company(Base):                                                #公司信息基类
+class Company(Base_all):                                                #公司信息基类
     __tablename__ = 'Company'                                       #表名
     id = Column(Integer
                 , primary_key=True
@@ -90,7 +91,7 @@ class Company(Base):                                                #公司信
                           )
     is_deleted = Column(Integer, default=0)
 
-class Address(Base):
+class Address(Base_all):
     __tablename__ = 'Address'
     id = Column(Integer                                         #地址id,自增主键
                 , primary_key=True

students/main.py

@@ -5,17 +5,23 @@ from students.model import students_model
 from contextlib import asynccontextmanager
 
 # 合并接口
-Students_API = APIRouter()
-Students_API.include_router(s_api)
-
-# 自测接口
 @asynccontextmanager
-async def lifespan(app: FastAPI):
+async def S_Router(Students_API: APIRouter):
     Base.metadata.create_all(engine1)
     yield
     engine1.dispose()
 
-app = FastAPI(title="学生管理系统",lifespan=lifespan) # 这里必须把上面写的加上
+Students_API = APIRouter(lifespan=S_Router)
+Students_API.include_router(s_api)
+
+# 自测接口
+@asynccontextmanager
+async def S_Fastapi(app: FastAPI):
+    Base.metadata.create_all(engine1)
+    yield
+    engine1.dispose()
+
+app = FastAPI(title="学生管理系统",lifespan=S_Fastapi) # 这里必须把上面写的加上
 app.include_router(s_api,tags=["students"])
 
 

students/model/students_model.py

@@ -1,13 +1,15 @@
 # students_model处理数据库模型
 import datetime
 
-from students.databases import *
+from databases import engine_all,Base_all,Session
+from sqlalchemy import *
+# from students.databases import *
 from datetime import datetime
 from sqlalchemy.dialects.mysql import DATETIME
 from students.schema.students_request import SexEnum , EducationEnum
-from sqlalchemy import Enum
+from sqlalchemy import Enum,ForeignKey,Integer,String
 
-class Students(Base):
+class Students(Base_all):
     __tablename__ = 'students'
     id = Column(Integer
                  , primary_key=True
@@ -53,10 +55,12 @@ class Students(Base):
 
     # 外键字段
     class_id = Column(Integer
-                 , comment='学生班级'
-                 , nullable=False )
+                      , ForeignKey("classes.id")
+                      , comment='学生班级'
+                      , nullable=False )
 
     advisor_id = Column(Integer
+                        , ForeignKey("teachers.id")
                         , comment='顾问ID')
 
     # 额外字段