背景：
今天小鱼从0开始配置了下 SQLAlchemy 的连接方式，并查询到了结果，记录下来
需要操作四个地方
1. config ------数据库地址
2.init ----- 数据库初始化
3.model ----- 数据库表模型
4.增删改查
用的包：Flask-SQLAlchemy (2.1)
1.config
1 SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://tmadmin:zq@10.100.2.120/tm?charset=utf8'
2 SQLALCHEMY_COMMIT_ON_TEARDOWN = True
3
2. init
1 from flask import Flask
2 from flask_sqlalchemy import SQLAlchemy
3 from xxxx import config #导入1中的配置
4
5 app = Flask(__name__)
6 app.config.from_object(config)
7
3.model
1 from xxxx import db #从2中导入db
2
3 class TableName(db.Model):
4 __tablename__ = 'tablename'
5
6 id = db.Column(db.Integer, primary_key=True)
7 name= db.Column(db.String(100))
8 datetime = db.Column(db.DateTime)
9
10 #to_json 方便后面查询使用
11 def to_json(self):
12 dict = self.__dict__
13 if "_sa_instance_state" in dict:
14 del dict["_sa_instance_state"]
15 return dict
16
17 def __repr__(self):
18 return '<TableName%r>'
4.查询1
1 from xxx.model import TableName #从三中导入
2 from sqlalchemy.sql import text,and_,or_,func
3
4
5 table_name = TableName()
6
7 #定义查询条件
8 sql_text = ' 1=1 and name like "%%{name}%%"
9 and id = {id}'.format(name=xx,id=xx)
10
11 #条件、排序、分组
12 res = table_name.query.filter(text(sql_text)).order_by(text("id desc")).limit(xxx).group_by(text("name")).all()
13
14 #结果展示 [{"name":"xxx","id":xxx}········]
15 data = [i.to_json() for i in
