更新所有模块框架，建表已写好，学生查询模块已经写好，正在写新增模块。

students/dao/students_dao.py

@@ -0,0 +1,76 @@
+# student_dao：所有数据库的逻辑
+
+from students.model.students_model import Students
+from students.schema.students_request import *
+
+# 记得加校验
+
+# 查询
+def get_student_dao( s , db):
+    q = db.query(Students)
+    if s.get('sid'):
+        q = q.filter( Students.sid == s.sid )
+    if s.get('student_name'):
+        q = q.filter( Students.student_name == s.student_name )
+    if s.get('class_name'):
+        q = q.filter(Students.class_name == s.class_name)
+    if s.get('job_open_time'):
+        q = q.filter(Students.job_open_time == s.job_open_time)
+    if s.get('offer_issue_time'):
+        q = q.filter(Students.offer_issue_time == s.offer_issue_time)
+    if s.get('company_name'):
+        q = q.filter(Students.company_name == s.company_name)
+    if s.get('salary'):
+        q = q.filter(Students.salary >= s.salary)
+    s1 = q.all()
+    if s1:
+        return [{ "学生编号": i.sid
+                , "学生姓名": i.student_name
+                , "学生班级": i.class_name
+                , "就业开放时间": i.job_open_time
+                , "offer下发时间": i.offer_issue_time
+                , "就业公司名称": i.company_name
+                , "就业薪资": i.salary
+                } for i in s1
+               ]
+
+# 新增
+def add_student_dao( s , db):
+    try:
+        phone = s.get("student_phone")
+        if not phone:
+            return None
+        else:
+            s1 = Students( **s )
+            db.add(s1)
+    except Exception:
+        # 这里可以加日志
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        db.refresh(s1) # 从数据库再拉一次数据
+        return s1
+
+# 更新
+def update_student_dao( id , update_data , db):
+    try:
+        rows = db.query( Students ).filter( Students.sid == id ).update( update_data )
+    except Exception:
+        db.rollback()
+        return False
+    else:
+        db.commit()
+        return f"更新了{rows}条学生资料。"
+
+# 逻辑删除/软删除
+def delete_student_dao(sid, db):
+    try:
+        rows = db.query( Students ).filter( Students.sid == sid ).delete()
+    except Exception:
+        db.rollback()
+        rows = 0
+    else:
+        db.commit()
+    finally:
+        return f"删除了{rows}条学生资料。"