- 准备视图函数search()
- 修改base.html 中搜索输入框所在的
- <form action="{{ url_for('search') }}" method="get">
- <input name="q" type="text" placeholder="请输入关键字">
- 完成视图函数search()
- 获取搜索关键字
q = request.args.get('q’) - 条件查询
qu = Question.query.filter(Question.title.contains(q)).order_by('-creat_time’) - 加载查询结果：
return render_template('index.html', question=qu）
- 获取搜索关键字
- 组合条件查询
from sqlalchemy import or_, and_
示例：
Lobby.query.filter(
or_(
and_(
Lobby.id == Team.lobby_id,
LobbyPlayer.team_id == Team.id,
LobbyPlayer.player_id == player.steamid
),
and_(
Lobby.id == spectator_table.c.lobby_id,
spectator_table.c.player_id == player.steamid
)
)
)
from flask import Flask from flask_sqlalchemy import SQLAlchemy import config from flask import Flask, render_template, request, redirect, url_for,session from functools import wraps from datetime import datetime from sqlalchemy import or_, and_ app = Flask(__name__) app.config.from_object(config) db = SQLAlchemy(app) #登录的数据库 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)) db.create_all() #问题页的数据库 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('questions')) db.create_all() 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')) detail = db.Column(db.Text, nullable=False) creat_time = db.Column(db.DateTime, default=datetime.now) question=db.relationship('Question',backref=db.backref('comments',order_by=creat_time.desc)) author = db.relationship('User', backref=db.backref('comments')) db.create_all() # user=User(username='mis1',password='11111') # db.session.add(user) # db.session.commit() @app.route('/') def base(): return render_template('base.html') # 调用数据库把用户评论放在首页 @app.route('/index/') def index(): context = { 'questions':Question.query.order_by('-creat_time').all() } return render_template('index.html',**context) @app.route('/login/',methods=['GET','POST']) def login(): if request.method == 'GET': return render_template('login.html') else: usern = request.form.get('username') passw = request.form.get('password') user = User.query.filter(User.username == usern).first() if user: if user.password==passw: session['user'] = usern session['userid'] = user.id session.permanent = True return redirect(url_for('base')) else: return u'password error' else: return u'password is not existed' @app.route('/regist/',methods=['GET','POST']) def regist(): if request.method=='GET': return render_template('regist.html') else: usern=request.form.get('username') passw=request.form.get('password') nickn=request.form.get('nickname') user=User.query.filter(User.username==usern).first() if user: return u'username existed' else: user=User (username=usern,password=passw,nickname=nickn) db.session.add(user) db.session.commit() return redirect(url_for('login')) 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#发布前登录，python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().id question = Question(title=title, detail=detail, author_id=author_id) db.session.add(question) db.session.commit() return redirect(url_for('index')) # 评论页的详细页 @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) #评论功能 @app.route('/comment/',methods=['POST']) @loginFirst#发布前登录，python装饰器 def comment(): detail = request.form.get('fabu') author_id = User.query.filter(User.username == session.get('user')).first().id quest_id =request.form.get('question_id') pinglun = Comment(question_id=quest_id,detail=detail, author_id=author_id) db.session.add(pinglun) db.session.commit() return redirect(url_for('detail',question_id=quest_id)) #个人信息页 @app.route('/usercenter/<user_id>/<tag>') @loginFirst#发布前登录，python装饰器 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.context_processor def mycontext(): usern=session.get('user') if usern: return{'username':usern} else: return{} @app.route('/search/') def search(): qu=request.args.get('q') ques=Question.query.filter(or_(Question.title.contains(qu),Question.detail.contains(qu))).order_by('-creat_time') return render_template('index.html', questions=ques) @app.route('/logout/') def logout(): session.clear() return redirect(url_for('index')) if __name__ == '__main__': app.run(debug=True)
<!DOCTYPE HTML> <html> <head lang="en"> <meta charset="UTF-8"> <title>{% block title %}首页{% endblock %}</title> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous"> <script src="{{ url_for('static',filename='js/base.js') }}"></script> {% block head %}{% endblock %} <body id="mybody"> <nav class="navbar navbar-expand-lg navbar-light bg-light"> <div class="collapse navbar-collapse" id="navbarSupportedContent"> <ul class="navbar-nav mr-auto"> <li class="nav-item"><a class="navbar-brand" href="{{ url_for('index') }}">首页 </a></li> <li class="nav-item active"><a class="navbar-brand" href="{{ url_for('question') }}">问题 </a></li> <form action="{{url_for('search')}}" method="get" class="form-inline" > <input name="q" class="form-control mr-sm-2" type="search" placeholder="请输入关键字" > <button class="btn btn-outline-success my-2 my-sm-0" type="submit">搜索</button> </form> </ul> <nav class="navbar navbar-light bg-light"> {% if username %} <a class="navbar-brand" href="{{ url_for('usercenter',user_id=session.get('userid'),tag=1) }}">{{ session.get('user') }} </a> <a class="navbar-brand" href="{{ url_for('logout') }}">注销 </a> {% else %} <a class="navbar-brand" href="{{ url_for('login') }}">登陆 </a> <a class="navbar-brand" href="{{ url_for('regist') }}">注册 </a> {% endif %} <img src="{{ url_for('static',filename='image/on.jpg') }}" width="14" height="14"> </nav> </div> </nav> {% block main %} {% endblock %} <footer class="copyright"> </footer> </body> </html>
