发布功能完成。
- 编写要求登录的装饰器
from functools import wraps
def loginFirst(func): #参数是函数
@wraps(func)
def wrapper(*args, ** kwargs): #定义个函数将其返回
#要求登录
return func(*args, ** kwargs)
return wrapper #返回一个函数
- 应用装饰器,要求在发布前进行登录,登录后可发布。
@app.route('/question/',methods=['GET','POST'])
@loginFirst
def question():
- 建立发布内容的对象关系映射。
class Question(db.Model):
- 完成发布函数。
保存到数据库。
重定向到首页。
from flask import Flask, render_template, url_for, redirect, request,session
from flask_sqlalchemy import SQLAlchemy
from functools import wraps
import config
from datetime import datetime
app = Flask(__name__)
app.config.from_object(config)
db = SQLAlchemy(app)
class User(db.Model):
__tablename__ = 'user'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
username = db.Column(db.String(20), nullable=False)
password = db.Column(db.String(20), nullable=False)
nickname = db.Column(db.String(20))
class Question(db.Model):
__tablename__='question'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
title =db.Column(db.String(100), nullable=False)
detail = db.Column(db.Text, nullable=False)
creat_time=db.Column(db.DateTime,default=datetime.now)
author_id = db.Column(db.Integer,db.ForeignKey('user.id'))
author=db.relationship('User',backref=db.backref('question'))
db.create_all()
@app.route('/')
def myweb():
return render_template("index.html")
@app.route('/login/', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
return render_template("login.html")
else:
username = request.form.get('username')
password = request.form.get('password')
user = User.query.filter(User.username == username).first()
if user:
if user.password == password:
session['user'] = username
session.permannet = True
return redirect(url_for('index'))
else:
return '密码错误'
else:
return '用户名不存在'
@app.context_processor
def mycontext():
usern = session.get('user')
if usern:
return {'username':usern}
else:
return {}
@app.route('/logout')
def logout():
session.clear()
return redirect(url_for('index'))
@app.route('/signin/', methods=['GET', 'POST'])
def regist():
if request.method == 'GET':
return render_template("signin.html")
else:
username = request.form.get('username')
password = request.form.get('password')
nickname = request.form.get('nickname')
user = User.query.filter(User.username == username).first()
if user:
return ' 用户名已存在'
else:
user = User(username=username, password=password, nickname=nickname)
db.session.add(user) # 数据库,添加操作
db.session.commit()
return redirect(url_for('login'))
def login_re(func):
@wraps(func)
def wrapper(*args,**kwargs):
if session.get('user'):
return func(*args,**kwargs)
else:
return redirect(url_for('login'))
return wrapper
@app.route('/question/',methods=['GET','POST'])
@login_re
def question():
if request.method=='GET':
return render_template('question.html')
else:
title=request.form.get('title')
detail=request.form.get('detail')
author_id=User.query.filter(User.username==session.get('user')).first().id
question=Question(title=title,detail=detail,author_id=author_id)
db.session.add(question) # 数据库,添加操作
db.session.commit()
return redirect(url_for('index'))
if __name__ == '__main__':
app.run(debug=True)
{% extends'myweb.html' %} {% block questiontitle %}提问页面{% endblock %} {% block questionhead %} <link rel="stylesheet" type="text/css" href="../static/css/index.css"/> <script src="../static/js/question.js"></script> {% endblock %} {% block questiontbody %} <form action="{{ url_for('question') }}" method="post"> <div class="form-group"> <label for="questionTitle">标题</label> <textarea class="form-control" rows="1" id="questionTitle"></textarea> <label for="questionDatail">详情</label> <textarea class="form-control" rows="5" id="questionDatail"></textarea> <div id="error_box"><br></div> <div class="input-area"> <input type="submit" value="立即发布"> </div> </div> </form> {% endblock %}