學習日誌-flask-01,flask_sqlalchemy文件組織結構示例

時間 2020-05-05

標籤學習日誌 flask sqlalchemy 文件組織結構示例欄目 Python 简体版

原文原文鏈接

1用意

flask靈活的文件組織結構讓不少新手玩家痛苦萬分,網上的相關教程也是參差不齊,本人也是在幾近崩潰的邊緣瘋狂試探
,堅持即時勝利,終於被我摸索出一個較爲適用的簡單文件組織結構. 本文從單文件結構,逐步拆分紅多個部分,至於其中
各個步驟拆分的用意,還請恕在下才疏學淺,難以用文字形容,各位看官請自行體會.html

2.簡單示例

目錄結構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數據庫

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

sign_up.htmlflask

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

2.開始拆分

首先咱們在根目錄中新建一個extensions.py,將app.py中的頭部部分拿進去
extensions.pysession

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import config

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

而後在根目錄中新建models包,並在models裏面新建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)

接着在根目錄下新建routes包,並在routes裏面新建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'))

最後在根目錄中新建一個入口文件run.pypost

run.py

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

    app.run()

目錄結構

數據庫初始化比較簡單,請自行建庫建表,修改鏈接配置自此大功告成,邁過flask的第一大坑

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