Flask框架的学习指南之制作简单blog系统

# -*- coding: utf-8 -*-
from flask import Flask

#创建项目对象
app = Flask(__name__)

from blog3 import app

@app.route('/')
def hello_world():
 return 'Hello World!'
if __name__ == '__main__':
 app.run(debug=True)

from blog2 import db

class User(db.Model):
 __tablename__ = 'b_user'
 id = db.Column(db.Integer,primary_key=True)
 username = db.Column(db.String(10),unique=True)
 password = db.Column(db.String(16))

 def __init__(self,username,password):
 self.username = username
 self.password = password
 def __repr__(self):
 return '' % self.username

from blog2 import db

class Category(db.Model):
 __tablename__ = 'b_category'
 id = db.Column(db.Integer,primary_key=True)
 title = db.Column(db.String(20),unique=True)
 content = db.Column(db.String(100))

 def __init__(self,title,content):
 self.title = title
 self.content = content
 def __repr__(self):
 return '' % self.title

# _*_ coding: utf-8 _*_

#调试模式是否开启
DEBUG = True

SQLALCHEMY_TRACK_MODIFICATIONS = False
#session必须要设置key
SECRET_KEY='A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'

#mysql数据库连接信息,这里改为自己的账号
SQLALCHEMY_DATABASE_URI = "mysql://username:password@ip:port/dbname"

# -*- coding: utf-8 -*-
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)#import os#print os.environ.keys()#print os.environ.get('FLASKR_SETTINGS')#加载配置文件内容app.config.from_object('blog2.setting') #模块下的setting文件名，不用加py后缀 app.config.from_envvar('FLASKR_SETTINGS') #环境变量，指向配置文件setting的路径#创建数据库对象 db = SQLAlchemy(app)

E:workdirlog2> set FLASKR_SETTINGS=E:workdirlog2log2setting.py

E:workdirlog2>python
Python 2.7.10 (default, May 23 2015, 09:44:00) [MSC v.1500  bit (AMD)] on wi
n32
Type "help", "copyright", "credits" or "license" for more information.
>>> from blog2 import db
>>> db.create_all()
>>>
>>>

#只有在app对象之后声明，用于导入model否则无法创建表
from blog2.model import User,Category

 
 
 
 
 
Flaskr
 
 {% if not session.logged_in %}
 log in
 {% else %}
 log out
 {% endif %}
 
 {% for message in get_flashed_messages() %}
 {{ message }}
 {% endfor %}
 {% block body %}{% endblock %}
 

{% extends "layout.html" %}
{% block body %}
 
Login
 {% if error %}
Error: {{ error }}{% endif %}
 
{% endblock %}

{% extends "layout.html" %}
{% block body %}
 {% if session.logged_in %}
 
 {% endif %}
 
 {% for entry in entries %}
 
{{ entry.title }}
{{ entry.content|safe }}
 {% else %}
 
Unbelievable. No entries here so far
 {% endfor %}
 
{% endblock %}

body { font-family: sans-serif; background: #eee; }
a, h1, h2 { color: #377BA8; }
h1, h2 { font-family: 'Georgia', serif; margin: 0; }
h1 { border-bottom: 2px solid #eee; }
h2 { font-size: 1.2em; }

.page { margin: 2em auto; width: 35em; border: 5px solid #ccc;
 padding: 0.8em; background: white; }
.entries { list-style: none; margin: 0; padding: 0; }
.entries li { margin: 0.8em 1.2em; }
.entries li h2 { margin-left: -1em; }
.add-entry { font-size: 0.9em; border-bottom: 1px solid #ccc; }
.add-entry dl { font-weight: bold; }
.metanav { text-align: right; font-size: 0.8em; padding: 0.3em;
 margin-bottom: 1em; background: #fafafa; }
.flash { background: #CEE5F5; padding: 0.5em;
 border: 1px solid #AACBE2; }
.error { background: #F0D6D6; padding: 0.5em; }

from blog2.model.User import User
from blog2.model.Category import Category
import os

from blog2 import app,db
from flask import request,render_template,flash,abort,url_for,redirect,session,Flask,g

@app.route('/')
def show_entries():
categorys = Category.query.all()
return render_template('show_entries.html',entries=categorys)

@app.route('/add',methods=['POST'])
def add_entry():
if not session.get('logged_in'):
abort(401)
title = request.form['title']
content = request.form['text']
category = Category(title,content)
db.session.add(category)
db.session.commit()
flash('New entry was successfully posted')
return redirect(url_for('show_entries'))

@app.route('/login',methods=['GET','POST'])
def login():
error = None
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
user = User.query.filter_by(username=request.form['username']).first()
passwd = User.query.filter_by(password=request.form['password']).first()

if user is None:
error = 'Invalid username'
elif passwd is None:
error = 'Invalid password'
else:
session['logged_in'] = True
flash('You were logged in')
return redirect(url_for('show_entries'))
return render_template('login.html', error=error)

@app.route('/logout')
def logout():
session.pop('logged_in', None)
flash('You were logged out')
return redirect(url_for('show_entries'))

#只有在app对象之后声明，用于导入view模块
from blog2.controller import blog_manage