first commit

Cov.py

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+from flask import Flask
+from flask import render_template
+from flask import request
+
+app = Flask(__name__)
+
+@app.route('/')
+def hello_world():
+    return "hello world"
+
+@app.route('/login')
+def hello_world2():
+    name = request.values.get("name")
+    pwd = request.values.get("pwd")
+    return f"name={name},pwd={pwd}"
+
+@app.route('/abc')
+def hello_world1():
+    id = request.values.get("id")
+
+    return f"""
+    <form action="/login">
+        账号<input name="name" value="{id}"><br>
+        密码<input name="pwd">
+        <input type="submit">
+    </form>
+    
+    """
+
+
+if __name__=="__main__":
+    app.run()

app.py

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+from flask import Flask
+from flask import render_template
+app = Flask(__name__)
+
+@app.route('/')
+def index():
+    return '主页'
+
+@app.route('/index/')
+def hello(name=None):
+
+    return render_template('index.html',name=name)
+
+app.run()

app2.py

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+from flask import Flask,render_template,request,redirect
+from flask_sqlalchemy import SQLAlchemy
+
+app = Flask(__name__)
+db = SQLAlchemy(app)
+

lkk.py

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+from flask import Flask,render_template,request,redirect
+from flask_sqlalchemy import SQLAlchemy
+
+
+app = Flask(__name__)
+app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:root@127.0.0.1:3306/test'
+db = SQLAlchemy(app)
+
+
+@app.route("/select_all")
+def select_all():
+    jijinhui_list = jijinhui.query.all() # 拿到数据库的数据
+    return render_template("lkk.html",jijinhui_list=jijinhui_list)
+
+@app.route("/")
+def index():
+    return select_all()
+
+
+if __name__ == '__main__':
+    app.run()

test04-20.py

@@ -0,0 +1,59 @@
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+
+
+app = Flask(__name__)
+
+#设置连接数据库的URL
+app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+mysqldb://root:root@127.0.0.1:3306/test'
+
+#设置每次请求结束后会自动提交数据库中的改动
+app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN'] = True
+
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
+#查询时会显示原始SQL语句
+app.config['SQLALCHEMY_ECHO'] = True
+db = SQLAlchemy(app)
+
+class Role(db.Model):
+    # 定义表名
+    __tablename__ = 'roles'
+    # 定义列对象
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(64), unique=True)
+    us = db.relationship('User', backref='role')
+
+
+class User(db.Model):
+    __tablename__ = 'users'
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(64), unique=True, index=True)
+    email = db.Column(db.String(64),unique=True)
+    pswd = db.Column(db.String(64))
+    role_id = db.Column(db.Integer, db.ForeignKey('roles.id'))
+class City(db.Model):
+    #表模型
+    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
+    provincename = db.Column(db.String(255))
+    cityname = db.Column(db.String(255))
+    usernumber = db.Column(db.Integer)
+
+
+db.create_all()
+ro1 = City(name='admin')
+ro2 = Role(name='user')
+db.session.add_all([ro1, ro2])
+db.session.commit()
+us1 = City(provincename='hubei', cityname='wuhan',  usernumber=ro1.id)
+us2 = City(provincename='hubei', cityname='yichang',  usernumber=ro2.id)
+
+
+db.session.add_all([us1, us2])
+db.session.commit()
+
+@app.route('/')
+def index():
+    cityList = City.query.order_by(City.id.desc()).all()
+    return render_template("index.html", city_list=cityList)
+
+app.run(debug=True)

test1-04-21.py

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+from flask import Flask,render_template,request,redirect
+from flask_sqlalchemy import SQLAlchemy
+
+app = Flask(__name__)
+db = SQLAlchemy(app)
+
+#设置数据库连接
+app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:root@127.0.0.1:3306/test1'
+
+#定义模型
+class City(db.Model):
+    #表模型
+    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
+    provincename = db.Column(db.String(255))
+    cityname = db.Column(db.String(255))
+    usernumber = db.Column(db.Integer)
+
+db.create_all()
+#查询所有数据
+@app.route("/select")
+def selectAll():
+    cityList = City.query.order_by(City.id.desc()).all()
+    return render_template("index2.html",city_list = cityList)
+
+@app.route('/')
+def index():
+    return selectAll()
+#添加数据
+@app.route('/insert',methods=['GET','POST'])
+def insert():
+    #进行添加操作
+    province = request.form['province']
+    cityname = request.form['city']
+    number = request.form['number']
+    city = City(provincename=province,cityname=cityname,usernumber=number)
+    db.session.add(city)
+    db.session.commit()
+    #添加完成重定向至主页
+    return redirect('/')
+
+@app.route("/insert_page")
+def insert_page():
+    #跳转至添加信息页面
+    return render_template("insert.html")
+
+
+#删除数据
+@app.route("/delete",methods=['GET'])
+def delete():
+    #操作数据库得到目标数据，before_number表示删除之前的数量，after_name表示删除之后的数量
+    id = request.args.get("id")
+    city = City.query.filter_by(id=id).first()
+    db.session.delete(city)
+    db.session.commit()
+    return redirect('/')
+#修改操作
+@app.route("/alter",methods=['GET','POST'])
+def alter():
+    # 可以通过请求方式来改变处理该请求的具体操作
+    # 比如用户访问/alter页面  如果通过GET请求则返回修改页面 如果通过POST请求则使用修改操作
+    if request.method == 'GET':
+        id = request.args.get("id")
+        province = request.args.get("provincename")
+        cityname = request.args.get("cityname")
+        usernumber = request.args.get("usernumber")
+        city = City(id = id,provincename=province,cityname=cityname,usernumber = usernumber)
+        return render_template("alter.html",city = city)
+    else:
+        #接收参数，修改数据
+        id = request.form["id"]
+        province = request.form['province']
+        cityname = request.form['city']
+        number = request.form['number']
+        city = City.query.filter_by(id = id).first()
+        city.provincename = province
+        city.cityname = cityname
+        city.usernumber = number
+        db.session.commit()
+        return redirect('/')
+
+
+
+
+if __name__ == "__main__":
+    app.run(debug = True)