# 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。"