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