test四轮完成的版本，并入了刘盼的老师模块

model/wl_teacher_model.py

@@ -1,5 +1,5 @@
-from sqlalchemy import create_engine
-from database import Base, engine
+from sqlalchemy import String, Column, ForeignKey, Integer
+from database import Base
 
 class Teacher(Base):
     __tablename__ = 'wl_teacher'
@@ -8,15 +8,10 @@ class Teacher(Base):
     t_name = Column(String(50), nullable=False)
     t_phone = Column(String(20), unique=True, nullable=True)
     t_email = Column(String(20), unique=False)
-    class_id = Column(Integer, ForeignKey("wl_class.id"), nullable=False)
+    #创建老师时必须指定一个存在的班级
+    class_id = Column(Integer, ForeignKey("class_info.class_id"), nullable=False)
     role = Column(String(50), nullable=False)
     is_deleted = Column(Integer, default=0)
 
-    def generate_teacher_no(db: Session, hire_date: date):
-        """
-        工号规则：T + 入职日期(YYYYMMDD) + 3位当天序号
-        例如：T20250912001、T20250912002
-        """
-        date_str = hire_date.strftime("%Y%m%d")
-        prefix = f"T{date_str}"
+