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。
{% extends'base.html' %} {% block title %} 发布问答 {% endblock %} {% block head %} <link rel="stylesheet" href="{{ url_for('static',filename='css/question.css')}}"> {% endblock %} {% block main %} <div class="question"> <h3>发布问答</h3> <form class="biao" action="{{ url_for('question') }}" method="post"> <div class="form-group"> <label for="ask">标题</label> <br> <textarea class="form-control" rows="1" id="ask" placeholder="输入标题" name="title"></textarea> </div> <br> <div class="form-group"> <label for="questionDetail">详情</label> <br> <textarea class="form-control" rows="8" id="questionDetail" placeholder="输入内容" name="detail"></textarea> </div> <p></p> <input type="checkbox">check me out <br><br> <button type="submit" class="btn-fabu" onclick="fnQuestion()">发布</button> </form> </div> {% endblock %}
from flask import Flask,render_template,request,redirect,url_for,session from flask_sqlalchemy import SQLAlchemy from functools import wraps from datetime import datetime import config 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) #db.create_all() 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 base(): return render_template('base.html') @app.route('/shouye/') def shouye(): return render_template('shouye.html') @app.route('/login/',methods=['GET','POST']) def login(): if request.method == 'GET': return render_template('login.html') else: usern = request.form.get('username') passw = request.form.get('password') user = User.query.filter(User.username == usern).first() if user: if user.password == passw: session['user'] = usern return redirect(url_for('shouye')) else: return u'password error' else: return u'username is not existed.' @app.route('/zhuce/',methods=['GET','POST']) def zhuce(): if request.method == 'GET': return render_template('zhuce.html') else: usern = request.form.get('username') passw = request.form.get('password') user = User.query.filter(User.username == usern).first() if user: return u'username existed' else: user1 = User(username=usern, password=passw) db.session.add(user1) db.session.commit() return redirect(url_for('login')) def loginFirst(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']) @loginFirst 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) db.session.commit() return redirect(url_for('shouye')) @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('shouye')) if __name__ == '__main__': app.run(debug=True)