学习日志-flask-01,flask_sqlalchemy文件组织结构示例

时间 2020-05-05

标签学习日志 flask sqlalchemy 文件组织结构示例栏目 Python 繁體版

原文原文链接

1用意

flask灵活的文件组织结构让不少新手玩家痛苦万分,网上的相关教程也是参差不齐,本人也是在几近崩溃的边缘疯狂试探
,坚持即时胜利,终于被我摸索出一个较为适用的简单文件组织结构. 本文从单文件结构,逐步拆分红多个部分,至于其中
各个步骤拆分的用意,还请恕在下才疏学浅,难以用文字形容,各位看官请自行体会.html

2.简单示例

目录结构python

app.pymysql

from flask import Flask, render_template, request, redirect, url_for
from flask_sqlalchemy import SQLAlchemy
import config

app = Flask(__name__)
app.config.from_object(config)
db = SQLAlchemy(app)


class Record(db.Model):
    __tablename__ = 'record'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(100), nullable=False)
    content = db.Column(db.Text, nullable=False)


@app.route('/')
def index():
    return render_template('index.html')


@app.route('/sign_up', methods=['GET', 'POST'])
def add_user():
    if request.method == 'GET':
        return render_template('sign_up.html')
    else:
        for i in request.args:
            print(i)
        # print(request.args.get('username')) #None
        name = request.form.get('name')
        print("name={}".format(name))
        content = request.form.get('content')
        print("content={}".format(content))
        record = Record(name=name, content=content)
        db.session.add(record)
        db.session.commit()
        return redirect(url_for('index'))


if __name__ == '__main__':
    db.init_app(app)

    app.run()

config.pysql

SQLALCHEMY_TRACK_MODIFICATIONS=True

DIALECT = 'mysql'
DRIVER = 'pymysql'
USERNAME = 'root'
PASSWORD = 'hujin666..'
HOST = '127.0.0.1'
PORT = '3306'
DATABASE = 'socketio_test'

SQLALCHEMY_DATABASE_URI = "{}+{}://{}:{}@{}:{}/{}?charset=utf8".format(DIALECT, DRIVER, USERNAME, PASSWORD, HOST, PORT,
                                                                       DATABASE)

index.html数据库

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
    <a href="/sign_up">注册</a>
</body>
</html>

sign_up.htmlflask

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册</title>
</head>
<body>
    <form action="/sign_up" method="post">
        <label for="name">用户名</label><input type="text" name="name" id="name">
        <label for="content">密 码</label><input type="text" name="content" id="content">
        <input type="submit" value="提交">
    </form>
</body>
</html>

2.开始拆分

首先咱们在根目录中新建一个extensions.py,将app.py中的头部部分拿进去
extensions.pysession

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import config

app = Flask(__name__)
app.config.from_object(config)
db = SQLAlchemy(app)

而后在根目录中新建models包,并在models里面新建record.py文件
record.pyapp

from extensions import db
class Record(db.Model):
    __tablename__ = 'record'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(100), nullable=False)
    content = db.Column(db.Text, nullable=False)

接着在根目录下新建routes包,并在routes里面新建record.py的路由文件socket

from extensions import app,db
from flask import render_template, request, redirect, url_for
from models.record import Record


@app.route('/')
def index():
    return render_template('index.html')


@app.route('/sign_up', methods=['GET', 'POST'])
def add_user():
    if request.method == 'GET':
        return render_template('sign_up.html')
    else:
        for i in request.args:
            print(i)
        # print(request.args.get('username')) #None
        name = request.form.get('name')
        print("name={}".format(name))
        content = request.form.get('content')
        print("content={}".format(content))
        record = Record(name=name, content=content)
        db.session.add(record)
        db.session.commit()
        return redirect(url_for('index'))

最后在根目录中新建一个入口文件run.pypost

run.py

from extensions import db
from routes.record import app
if __name__ == '__main__':
    db.init_app(app)

    app.run()

目录结构

数据库初始化比较简单,请自行建库建表,修改链接配置自此大功告成,迈过flask的第一大坑