122 lines
4.8 KiB
Python
122 lines
4.8 KiB
Python
from sqlalchemy import func, desc
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from sqlalchemy.exc import SQLAlchemyError
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from model.epy_model import Employment
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from fastapi import HTTPException
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from model.stu_model import Student
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from model.sc_model import Scores
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# ① 超30岁学员
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def get_stu_over_30(db):
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try:
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rows = db.query(Student).filter(Student.age>30,Student.is_deleted == 0).all()
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return [{'id': i.stu_id, 'name': i.stu_name} for i in rows]
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except SQLAlchemyError as e:
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db.rollback()
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raise HTTPException(status_code=400,detail=f'查询超三十岁学员信息失败:{str(e)}')
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# ② 各班人数 + 男女比
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def get_class_gender_count(db):
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try:
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rows = db.query(
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Student.class_id,
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Student.gender,
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func.count(1).label('num')
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).group_by(Student.class_id, Student.gender).all()
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return [{'班级': r.class_id, '性别': r.gender, '人数':r.num } for r in rows]
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=400,detail=f'查询各班人数与男女比例失败:{str(e)}')
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# ③ 每次考试都≥80分的学生
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def get_stu_all_pass_80(db):
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try:
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rows = db.query(
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Scores.stu_id,
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Student.stu_name,
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func.min(Scores.score).label('min_score')
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).join(Student, Student.stu_id == Scores.stu_id) \
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.group_by(Scores.stu_id, Student.stu_name) \
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.having(func.min(Scores.score) >= 80).all()
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t = ['stu_id', 'stu_name', 'min_score']
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l = [dict(zip(t, row)) for row in rows]
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return l
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=400,detail=f'查询成绩大于80的学生失败:{str(e)}')
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# ④ 两次以上不及格的学生
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def get_stu_two_fail(db):
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try:
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rows = db.query(
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Student.stu_name,
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Student.class_id,
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).join(Scores, Scores.stu_id == Student.stu_id) \
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.filter(Scores.score < 60) \
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.group_by(Scores.stu_id,Student.stu_name,Student.class_id) \
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.having(func.count(Scores.id) >= 2).all()
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t = ['stu_name', 'class_id']
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l = [dict(zip(t, row)) for row in rows]
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return l
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=400,detail=f'查询两次不及格的学生失败:{str(e)}')
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# ⑤ 每次考试各班平均分（降序）
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def get_class_avg_sc(db):
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try:
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rows = db.query(
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Scores.exam_seq,
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Student.class_id,
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func.avg(Scores.score).label('avg_score')
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).join(Student, Student.stu_id == Scores.stu_id) \
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.group_by(Scores.exam_seq, Student.class_id) \
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.order_by(desc('avg_score')).all()
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t = ['exam_seq', 'class_id','avg_score']
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l = [dict(zip(t, row)) for row in rows]
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return l
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=400, detail=f'查询各班平均分失败:{str(e)}')
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# ⑥ 薪资前五名
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def get_top5_salary(db):
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try:
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rows = db.query(Student.stu_name, Student.class_id,Employment.work_date,Employment.company,Employment.salary).join(Student, Student.stu_id == Employment.stu_id).order_by(Employment.salary.desc()).limit(5).all()
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t = ['stu_name','class_id','work_date','company','salary']
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l = [dict(zip(t, row)) for row in rows]
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print(l)
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return {'code': 200, 'data': l}
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=400,detail=f'查询薪资前五名失败失败:{str(e)}')
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# ⑦ 每个学生就业时长
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def get_stu_duration(db):
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try:
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rows = db.query(Employment.stu_id,func.datediff(Employment.offer_date,Employment.open_date).label('offer_diff')).group_by(Employment.stu_id,Employment.offer_date,Employment.open_date).all()
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t = ['s_id', 'offer_diff']
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l = [dict(zip(t, row)) for row in rows]
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return {'code': 200, 'data': l}
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=400,detail=f'查询每个学生的就业时长失败:{str(e)}')
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# ⑧ 各班平均就业时长
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def get_class_avg_duration(db):
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try:
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rows = db.query(
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Student.class_id,
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func.avg(func.datediff(Employment.offer_date, Employment.open_date)).label('avg_duration')
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).join(Student, Student.stu_id == Employment.stu_id).filter(
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Employment.open_date.isnot(None)
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).group_by(Student.class_id).all()
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t = ['class_id', 'avg_duration']
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l = [dict(zip(t, row)) for row in rows]
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return l
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except Exception as e:
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db.rollback()
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raise HTTPException(status_code=400,detail=f'查询各班平均就业时长失败:{str(e)}')
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