cursor = conn.cursor() cursor.execute('select * from luffy_banner')print(cursor.fetchall()) 4 使用sqlalchemy创建操作数据库 importdatetimefromsqlalchemyimportcreate_enginefromsqlalchemy.ext.declarativeimportdeclarative_basefromsqlalchemyimportColumn, Integer, String, Text, ForeignKey, DateTime, UniqueConst...
# 第一步:写好函数 def before_request_signal(*args,**kwargs): # print('请求来了,触发了这个信号') print(args) print(kwargs) print('模板渲染了,触发了这个信号') # 第二步:跟信号绑定 signals.request_started.connect(before_request_signal) # signals.request_finished.connect(before_request_signa...
# 池中没有线程最多等待的时间,否则报错pool_recycle=-1# 多久之后对线程池中的线程进行一次连接的回收(重置))# 3 通过engine获得conn,cursorconn = engine.raw_connection()# 拿到连接对象cursor = conn.cursor()# 4 具体操作cursor.execute('select * from article limit 10')print(cursor.fetchall(...
安装‘flask-sqlalchemy’:‘sudo pip instal flask-sqlalchemy’ 二.Flask-SQLAlchemy 的使用 初始化和设置数据库配置信息 使用flask_sqlalchemy 中的SQLAlchemy进行初始化: from flask_sqlalchemy import SQLAlchemy app = Flask(_name_) db = SQLAlchemy(app) 1. 2. 3. 设置配置信息:在"config.py"文件中...
Sqlalchemy获取游标 从网上搜索的话,通常搜出来的代码都是这样的: engine =create_engine('sqlite:///file.db') connection = engine.connect() try: cursor_obj = connection.cursor() cursor_obj.execute("select * from table1") results_one = cursor_obj.fetchall() ...
作用第一次请求之前执行@app.before_first_requestdefcreate_tables():#运行models,以创建不存在的表db.create_all() 接下来为了体现外键的作用,教学又新增了新表stores,下面粗略的说明一下 更多有关SQLAlchemy的问题 fromdbimportdbclassStoreModel(db.Model):__tablename__='stores'id=db.Column(db.Integer,...
needed to set up the application are done before running it.a.pyfrom flask import current_app from flask_sqlalchemy import SQLAlchemy DB = SQLAlchemy() setting = current_app.config["Database"] current_app.config["SQLALCHEMY_DATABASE_URI"] = f'mysql+pymysql://{settin...
Flask-SQLalchemy：操作数据库；Flask-migrate：管理迁移数据库；Flask-Mail:邮件；Flask-WTF：表单；Flask...
open_resource("schema.sql", mode="r") as f: db.cursor().executescript(f.read()) db.commit() # open database connection def get_db(): if not hasattr(g, "sqlite_db"): g.sqlite_db = connect_db() return g.sqlite_db # close database connection @app.teardown_appcontext def ...
dbutils.pooled_dbimportPooledDBimportpymysql,os,configparser from pymysql.cursorsimportDictCursor...