flask下的MySQL增删配置
添加数据
@app.route('/add')
def add_data():u = UserInfo()new_user1 = UserInfo(nickname='flask_test1', mobile='13888888888', signature='理想', create_time=datetime.now(), role_id=1)new_user2 = UserInfo(nickname='flask_test2', mobile='13999999999', signature='信念', create_time=datetime.now(), role_id=2)new_user3 = UserInfo(nickname='flask_test3', mobile='13777777777', signature='坚持', create_time=datetime.now(), role_id=1)new_user4 = UserInfo(nickname='flask_test4', mobile='13666666666', signature='奋斗', create_time=datetime.now(), role_id=2)u.add(new_user1)u.add(new_user2)u.add(new_user3)u.add(new_user4)return "添加数据成功"
查询数据
@app.route('/query1')
def query_data1():user_list = UserInfo.query.all()result = []for user in user_list:result.append(user.to_dict())return {'users': result}@app.route('/query2')
def query_data2():user=UserInfo.query.get(3) #主键查询return {'users': user.to_dict()}@app.route('/query3')
def query_data3():first_user = UserInfo.query.first() #查询第一条数据return {'users': first_user.to_dict()}@app.route('/query4')
def query_data4():user_list = UserInfo.query.filter(UserInfo.signature == '理想').all() #条件查询result = []for user in user_list:result.append(user.to_dict())return {'users': result}@app.route('/query5')
def query_data5():userlist = UserInfo.query.filter_by(signature='信念').all() #根据字段result = []for user in userlist:result.append(user.to_dict())return {'users': result}
删除数据
db.session.delete(delete_user)
db.session.commit()
@app.route('/delete1')
def delete_data():try:user = UserInfo.query.get(4)db.session.delete(user)db.session.commit()return "删除id为4的数据成功,使用db.session.delete()方法且已db.session.commit()提交（容易误删）"except Exception as e:return "删除失败，错误信息：(数据不存在或已经被（彻底）删除过一次)" + str(e)@app.route('/delete2')
def delete_data2():delete_user = UserInfo.query.get(3)delete_user.delete()return "删除id为3的数据成功,使用模型类的delete()方法（推荐）,修改status状态为0，已提交"
更新数据
@app.route('/update1')
def update_data():u = UserInfo()update_user = u.query.get(3)update_user.status = 1u.update()return "更新id为3的数据成功,使用模型类的update()方法（推荐）,将status状态改为1，已提交"
)
