發佈功能完成

• 編寫要求登陸的裝飾器

from functools import wraps

def loginFirst(func): #參數是函數

@wraps(func)

      def wrapper(*args, ** kwargs): #定義個函數將其返回

          #要求登陸

          return func(*args, ** kwargs)

      return wrapper #返回一個函數

• 應用裝飾器，要求在發佈前進行登陸，登陸後可發佈。

@app.route('/question/',methods=['GET','POST'])
@loginFirst
def question():

 

• 創建發佈內容的對象關係映射。

class Question(db.Model):

• 完成發佈函數。

保存到數據庫。

重定向到首頁。

 

from flask import Flask,render_template,request,redirect,url_for,session
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import config
from functools import wraps
from datetime import datetime

app = Flask(__name__)
#app.config['SECRET_KEY'] = '1234567'
app.config.from_object(config)
db = SQLAlchemy(app)

class User(db.Model):
    __tablename__ = 'user_test'
    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))
    tel = 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_test.id'))
    author = db.relationship('User',backref=db.backref('question'))

#db.create_all()

#2.在表中插入一條記錄
#user = User(username = 'mis1',password = '124', nickname='wk')
#db.session.add(user)
#db.session.commit()


#3.去表中查詢用戶名對應的密碼和接下來用戶輸入的密碼是否相匹配
#user = User.query.filter(User.username == 'mis1234').first()
#print(user)
#print(user.id,user.username)#輸出查找到的用戶名的id,密碼等.

#修改查詢到的用戶名的密碼等
#user = User.query.filter(User.username == 'mis1234').first()
#user.password = '123'
#db.session.commit()

#再次插入一條記錄
#user = User(username = 'wkkkkkk',password = '123456', nickname='kk')
#db.session.add(user)
#db.session.commit()

#刪除一條記錄
#user = User.query.filter(User.username == 'mis1234').first()
#db.session.delete(user)
#db.session.commit()




@app.route('/')
def index():
    return render_template('base.html')

@app.route('/login/',methods=['GET','POST'])
def login():
    if request.method == 'GET':
        return render_template('login.html')
    else:
        usern = request.form.get('uname')
        passw = request.form.get('upass')
        user = User.query.filter(User.username==usern).first()
        if user:
            if user.password == passw:
                session['user'] = usern;
                return redirect(url_for('index'))
            else:
                return 'password error!'
        else:
            return 'username is not exister!'



@app.route('/register/',methods=['GET','POST'])
def register():
    if request.method =='GET':
        return  render_template('register.html')
    else:
        usern = request.form.get('uname')
        teln = request.form.get('number')
        passw = request.form.get('upass')
        user = User.query.filter(User.username==usern).first()
        if user:
            return 'username existed'
        else:
            user1= User(username=usern,tel=teln,password=passw)
            db.session.add(user1)
            db.session.commit()
            return redirect(url_for('login'))


@app.context_processor
def mycontext():
    usern = session.get('user')
    if usern:
        return{'username':usern}
    else:
        return {}

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:
        biaoti = request.form.get('biaoti')
        detail = request.form.get('detail')
        author_id = User.query.filter(User.username==session.get('user')).first().id
        question = Question(title=biaoti,detail=detail,author_id=author_id)

        db.session.add(question)
        db.session.commit()
    return redirect(url_for('index'))


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

{% extends 'base.html' %}
{% block title %}
    發佈問答
{% endblock %}
{% block head %}
    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/question.css')}}">
    <script src="{{ url_for('static',filename='js/login.js') }}" type="text/javascript"></script>
{%  endblock %}
{% block main %}
    <!--<h3 style="font-family:華文細黑;color: black">發佈問答</h3>-->
    <form  class="all" method="post" action="{{ url_for('question') }}">
        <h3 >發佈問答</h3>
        <div class="form_group"></div>
        <div class="form_group">
            <!--<label for="questionDetial">標題</label>-->
            <!--<textarea class="form-control" rows="1" id="questionDetial"></textarea>-->
            <label for="biaoti" >標題</label>
            <input id="biaoti" type="text" placeholder="請輸入標題!" name="biaoti">

        </div>
        <div class="form_group">
            <label for="detail" >詳情</label>
            <textarea class="form-control" rows="5" id="detial" name="detail"></textarea>
        </div>


        <div class="checkbox">
            <input type="checkbox"> check me out <br>
            <button type="submit" class="btn bun-default">發佈</button>
        </div>
    </form>

{%  endblock %}