完成个人中心—导航标签

---

1. 1. 个人中心—视图函数带标签页面参数tag
      @app.route('/usercenter/<user_id>/<tag>')
      def usercenter(user_id, tag):
         if tag == ‘1':
             return render_template('usercenter1.html', **context)
      
      
   2. 个人中心—导航标签链接增加tag参数
      <li role=“presentation”><a href=“{{ url_for(‘usercenter’,user_id = user.id,tag = ‘1’) }}">全部问答</a></li>
      
      
   3. 个人中心—有链接到个人中心页面的url增加tag参数
       <a href="{{ url_for('usercenter',user_id = session.get('userid'), tag=1) }}">{{ session.get('user') }}</a>

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 datetimeapp = Flask(__name__)
app.config.from_object(config)
db=SQLAlchemy(app)class User(db.Model):__table__name = '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(50))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'))class Comment(db.Model):__tablename__='comment'id=db.Column(db.Integer, primary_key=True, autoincrement=True)author_id = db.Column(db.Integer,db.ForeignKey('user.id'))question_id = db.Column(db.Integer,db.ForeignKey('question.id'))creat_time = db.Column(db.DateTime, default=datetime.now)detail=db.Column(db.Text,nullable=False)question=db.relationship('Question',backref=db.backref('comments',order_by=creat_time.deac))author=db.relationship('User',backref=db.backref('comments'))#db.create_all()
@app.route('/')
def base():return render_template('base.html')@app.route('/index/')
def index():context = {'question':Question.query.all()}return render_template('index.html',**context)@app.route('/detail/<question_id>')
def detail(question_id):quest = Question.query.filter(Question.id == question_id).first()return render_template('detail.html',ques = quest)@app.route('/comment/',methods=['POST'])
def comment():comment = request.form.get('new_comment')ques_id = request.form.get('question_id')auth_id = User.query.filter(User.username == session.get('user')).first().idcomm = Comment(author_id=auth_id,question_id=ques_id,detail=comment)db.session.add(comm)db.session.commit()return redirect(url_for('detail',question_id=ques_id))@app.route('/usercenter/<user_id>/<tag>')def usercenter(user_id,tag):user = User.query.filter(User.id == user_id).first()context = {'user':user}if tag == '1':return  render_template('user1.html',**context)elif tag == '2':return  render_template('user2.html',**context)else:return  render_template('user3.html',**context)@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 u'username existed'else:user=User (username=username,password=password,nickname=nickname)db.session.add(user)db.session.commit()return redirect(url_for('login'))@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,User.password==password).first()if user:session['user']=usernamesession['userid'] = user.idsession.permanent = Truereturn redirect(url_for('index'))else:return u'error username or password'@app.route('/logout/')
def logout():session.clear()return redirect(url_for('index'))def loginFirst(func):#定义需要登录装饰器
    @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 #需要登录装饰器
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().idquestion = Question(title=title, detail=detail, author_id=author_id)db.session.add(question)db.session.commit()return redirect(url_for('index'))@app.context_processor
def mycontext():usern=session.get('user')if usern:return{'username':usern}else:return{}if __name__ == '__main__':app.run(debug=True)

{% extends 'base.html' %}
{% block title %}个人中心{% endblock %}{% block head %}<style>.nav_ul li{list-style: none;float:left;margin:10px;}</style>
{% endblock %}{% block main %}<ul class="nav nav_tabs"><li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag='1') }}">全部问答</a></li><li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag='2') }}">全部评论</a></li><li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag='3') }}">个人信息</a></li></ul>
{% endblock %}

<a href="{{ url_for('usercenter',user_id = session.get('user_id'),tag=3) }}" style="margin-right: -10px">{{session.get('user')}}</a>

<a href="{{ url_for('usercenter',user_id=foo.author_id,tag=3) }}" style="float: left;margin:3px auto; line-height:12px;">{{ foo.author.username }}</a>

<a href="{{url_for('usercenter',user_id=ques.author_id,tag=3)}}" class="name">{{ foo.author.username }}</a>