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, request, redirect, url_for, session from flask_sqlalchemy import SQLAlchemy import config from functools import wraps 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=TabError, autoincrement=True) username = db.Column(db.String(20), nullable=False) password = db.Column(db.String(20), nullable=False) nickname = db.Column(db.String(20), nullable=True) class Wenda(db.Model): __tablename__ = 'wenda' id = db.Column(db.Integer, primary_key=TabError, 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('wenda')) @app.route('/') def moban(): return render_template('moban.html') @app.route('/login/', methods=['GET', 'POST']) # 跳转登陆,methods定义它有两种请求方式 def login(): if request.method == 'GET': return render_template('login.html') else: username = request.form.get('user') password = request.form.get('psw') user = User.query.filter(User.username == username).first() if user: if user.password == password: session['user']=username session.permanent = True return redirect(url_for('moban')) else: return '用户名不存在' @app.context_processor def mycontext(): username=session.get('user') if username: return {'username':username} else: return {} @app.route('/register/', methods=['GET', 'POST']) def register(): if request.method == 'GET': return render_template('register.html') else: username = request.form.get('user') password = request.form.get('psw') nickname = request.form.get('nickname') user = User.query.filter(User.username == username).first() if user: return u'该用户已存在' else: user = User(username=username, password=password, nickname=nickname) db.session.add(user) db.session.commit() return redirect(url_for('login')) @app.route('/logout/') def logout(): session.clear() return render_template('moban.html') 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('/wenda/',methods=['GET','POST']) @loginFirst def wenda(): if request.method=='GET': return render_template('wenda.html') else: title = request.form.get('title') detail = request.form.get('detail') author_id = User.query.filter(User.username ==session.get('user')).first().id wenda = Wenda(title=title,detail=detail,author_id=author_id) db.session.add(wenda) db.session.commit() return redirect(url_for('moban')) if __name__ == '__main__': app.run(debug=True)
{% extends 'moban.html' %} {% block wendatitle %}问答界面{% endblock %} {% block wendahead %}{% endblock %} {% block wendabody %} <form action="{{ url_for('wenda') }}" method="post"> <div class="from-group"> <label for="gb"> 标题 </label> <br> <textarea class="from-control" cols="50" rows="2" id="gb" name="title"></textarea> </div> <hr> <div class="from-group"> <label for="gb1"> 详情</label> <br> <textarea class="from-control" cols="50" rows="10" id="gb1" name="detail"></textarea><br> <button type="submit">发送</button> </div> </form> {% endblock %} </html>