发布功能完成

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()


# 增加
# user = User(username='tan1997',password='19961021')
# db.session.add(user)
# db.session.commit()

# 查询
# user = User.query.filter(User.username == 'tan1997').first()
# print(user.username,user.password)

# 修改
# user=User.query.filter(User.username == 'tan1997').first()
# user.password=1234567
# db.session.commit()

# 删除
# user=User.query.filter(User.username == 'tan1997').first()
# db.session.delete(user)
# db.session.commit()

@app.route('/')
def myweb():
    return render_template("myweb.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('myweb'))
            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('/regist/', methods=['GET', 'POST'])
def regist():
    if request.method == 'GET':
        return render_template("regist.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'))

@app.route('/logout/')
def logout():
    session.clear()
    return redirect(url_for('myweb'))

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():
    return render_template("question.html")


if __name__ == '__main__':
    app.run(debug=True)