orm

app.py

@@ -13,6 +13,10 @@ from flask import Flask, render_template
 
 app = Flask(__name__)
 
+app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:root@127.0.0.1/example'
+
+
+
 @app.route("/")
 def hello():
     return "<h1>hello</h1>"

database.py

@@ -0,0 +1,55 @@
+# -*- encoding: utf-8 -*-
+'''
+@File    :   models.py   
+@License :   (C)Copyright 2018-2022
+
+@Modify Time      @Author    @Version    @Desciption
+------------      -------    --------    -----------
+2023/4/17 16:01   zart20      1.0         None
+'''
+
+# from flask import Flask
+# from flask_sqlalchemy import SQLAlchemy
+#
+# app = Flask(__name__)
+#
+# user = "root"
+# password = "123123"
+# database = 'example'
+# uri = "mysql+pymysql://%s:%s@127.0.0.1:3306/%s" % (user, password, database)
+# print(uri)
+# app.config['SQLALCHEMY_DATABASE_URI'] = uri
+# app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+#
+# db = SQLAlchemy(app)
+#
+# class User(db.Model):
+#     __tablename__="user"
+#     id = db.Column(db.Integer, primary_key=True)
+#     name = db.Column(db.String(255))
+#     age = db.Column(db.Integer)
+
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import scoped_session, sessionmaker
+from sqlalchemy.ext.declarative import declarative_base
+
+engine = create_engine('mysql+mysqldb://root:123123@127.0.0.1/example')
+db_session = scoped_session(
+    sessionmaker(
+        autoflush=False,
+        autocommit=False,
+        bind=engine
+    )
+)
+
+Base = declarative_base()
+Base.query = db_session.query_property()
+
+
+def init_db():
+    import models
+    Base.metadata.create_all(bind=engine)
+
+
+

models.py

@@ -0,0 +1,25 @@
+# -*- encoding: utf-8 -*-
+'''
+@File    :   models.py   
+@License :   (C)Copyright 2018-2022
+
+@Modify Time      @Author    @Version    @Desciption
+------------      -------    --------    -----------
+2023/4/17 16:43   zart20      1.0         None
+'''
+
+from sqlalchemy import Column, Integer, String
+from database import Base
+
+class User(Base):
+    __tablename__ = "users"
+    id = Column(Integer, primary_key=True)
+    name = Column(String(50), unique=True)
+    email = Column(String(120), unique=True)
+
+    def __init__(self, name=None, email=None):
+        self.name = name
+        self.email = email
+
+    def __repr__(self):
+        return f'<User {self.name!r}>'