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=True,autoincrement=True)
    username = db.Column(db.String(20),nullable=False)
    password = db.Column(db.String(20),nullable=False)
    userphone = db.Column(db.String(20),nullable=False)

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 zhuye():
    return render_template('zhuye.html')

@app.route('/denglu/',methods=['GET','POST'])
def denglu():
    if request.method == 'GET':
        return render_template('denglu.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.permanent = True
                return redirect(url_for('zhuye'))
            else:
                return '密码错误！'
        else:
            return '不存在该用户名！'


@app.route('/zhuce/',methods=['GET','POST'])
def zhuce():
    if request.method == 'GET':
        return render_template('zhuce.html')
    else:
        username = request.form.get('username')
        password = request.form.get('password')
        userphone = request.form.get('userphone')
        user = User.query.filter(User.username == username).first()
        if user:
            return 'username existed.'
        else:
            user1 = User(username=username, password=password, userphone=userphone,)
            db.session.add(user1)
            db.session.commit()
            return redirect(url_for('denglu'))

def loginFirst(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        if session.get('user'):
            return func(*args, **kwargs)
        else:
            return redirect(url_for('denglu'))
    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('zhuye'))

@app.context_processor
def mycontext():
    username=session.get('user')
    if username:
        return {'username':username}
    else:
        return {}
@app.route('/logout/')
def logout():
    session.clear()
    return redirect(url_for('zhuye'))

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

{% extends'base.html' %}
{% block title %}
    Question
{% 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 action="{{ url_for('question') }}" method="post" >
        <div class="form-group">
            <label for="question">问题</label>
            <br>
            <textarea class="form-control" rows="1" id="ask" name="title"></textarea>
        </div>
        <br>
        <div class="form-group">
            <label for="questionDetail">详情</label>
            <br>
            <textarea class="form-control" rows="8" id="questionDetail" name="detail"></textarea>
        </div>
        <p></p>
        <input type="checkbox">check me out
        <br><br>
        <button type="submit" class="btn-default">发布</button>

    </form>
    </div>
{% endblock %}