Flask DebugToolbar 的使用

安装

pip install flask-debugtoolbar

配置

Name	Description	Default
`DEBUG_TB_ENABLED`	启用工具栏。默认与app.debug值相同	`app.debug`
`DEBUG_TB_HOSTS`	允许Debug的白名单主机列表	any host
`DEBUG_TB_INTERCEPT_REDIRECTS`	是否拦截重定向。	`True`
`DEBUG_TB_PANELS`	面板中的模块/类名称列表	enable all built-in panels
`DEBUG_TB_PROFILER_ENABLED`	在所有请求上启用分析器	`False`, 用户启用
`DEBUG_TB_TEMPLATE_EDITOR_ENABLED`	启用模板编辑器	`False`

使用

我接着上一篇蓝图中的代码进行编写

App/__init__.py

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_debugtoolbar import DebugToolbarExtension

from config import SQLALCHEMY_DATABASE_URI, SQLALCHEMY_TRACK_MODIFICATIONS, SECRET_KEY

db = SQLAlchemy()

toolbar = DebugToolbarExtension()

def create_app():
    app = Flask(__name__)
    app.debug = True
    app.config['SQLALCHEMY_DATABASE_URI'] = SQLALCHEMY_DATABASE_URI
    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = SQLALCHEMY_TRACK_MODIFICATIONS
    app.config['SECRET_KEY'] = 'TTC'

    db.init_app(app=app)
    toolbar.init_app(app)
    return app

写一个ORM的对象

models.py

from App import db

class Student(db.Model):
    s_id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    s_name = db.Column(db.String(20))

    __tablename__ = 'student'

    def __init__(self, s_name):
        self.s_name = s_name

    def __repr__(self):
        return '<Student %r, %r>' % (self.s_id, self.s_name)

修改一下views控制文件

views.py

from flask import render_template

from App.Index import index
from App.Index.models import *

@index.route('/')
def index():
    stus = Student.query.all()
    return render_template('index.html', stus=stus)

在模板文件中添加数据解析

index.html

<html>
    <head>
        <title>Index</title>
    </head>
    <body>
        <h1></h1>
        {% for stu in stus %}
            <p>{{ stu }}</p>
        {% endfor %}
    </body>
</html>

这时我们的数据库中还没有建表。通过交互式环境来建表

(venv) [tianjun@192 Flask_TTC]$ python manager.py shell
>>> from App.Index.models import *
>>> db.create_all()  # 创建表
>>> stu = Student('TTC')  # 创建模型对象
>>> db.session.add(stu)  # 通过事务添加对象
>>> db.session.commit()  # 将事务提交

运行服务器

(venv) [tianjun@192 Flask_TTC]$ python manager.py runserver
 * Serving Flask app "App" (lazy loading)
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 244-604-680