flask笔记：7：用户资料信息页和头像

本文主要是介绍flask笔记：7：用户资料信息页和头像，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

用户信息页

创建一个新的视图函数 app/views.py

from app import app,db,lm,models
from flask import render_template,flash,redirect,url_for,session,request,g
from .forms import LoginForm
from .models import User
from flask.ext.login import login_user,logout_user,current_user,login_required@lm.user_loader
def load_user(id):return User.query.get(int(id))@app.before_request
def before_request():g.user = current_user@app.route('/')
@app.route('/index')
@login_required
def index ():user=g.userposts=[{'author':{'nickname':'John'},'body':'Beautiful day in Portland!'},{'author':{'nickname':'Susan'},'body':'The Avengers movie was so cool!'}]return render_template("index.html",title="Home",user=user,posts=posts)@app.route('/login', methods = ['GET', 'POST'])
def login():if g.user is not None and g.user.is_authenticated:return redirect(url_for('index'))form = LoginForm()if form.validate_on_submit():if models.User.query.filter_by(nickname=form.openid.data).first():user = User.query.filter_by(nickname=form.openid.data).first_or_404()login_user(user)return redirect(url_for('index'))else:return render_template('login.html',title = 'Sign In',error='[NO]',form = form)return render_template('login.html',title = 'Sign In',form = form)@app.route('/logout')
@login_required
def logout():logout_user()return redirect(url_for('index'))@app.route('/user/<nickname>')
@login_required
def user(nickname):user=User.query.filter_by(nickname=nickname).first()if user==None:flash('user'+nickname+'not found!')return redirect(url_for('index'))posts=[{'author':user,'body':'Test post #1 !!!'},{'author':user,'body':'Test post #2 !!!'}]return render_template('user.html',user=user,posts=posts)
#根据nickname区分用户，进入不同的用户界面

新增视图模板 app/templates/user.html

{% extends "base.html" %}
{% block content %}
<h1>User：{{user.nickname}} </h1>
<hr>
{% for post in posts %}
<p>{{post.author.nickname}} says：<b>{{post.body}}</b>
</p>
{% endfor %}
{% endblock %}

修改base模板 app/templates/base.html

<html><head>{% if title%}<title>{{title}} - mybolg</title>{% else%}<title>Welcome - myblog</title>{% endif %}</head><body><div>MyBlog:<a href="/index">Home</a>{% if g.user.is_authenticated %}|<a href="{{url_for('user',nickname = g.user.nickname)}}">Your Profile</a>|<a href="{{url_for('logout')}}">Logout</a>{% endif %}</div><hr>{% with messages = get_flashed_messages() %}{% if messages %}<ul>{% for message in messages %}<li>{{message}}</li>{% endfor %}</ul>{% endif %}{% endwith %}{% block content %}{% endblock %}</body>
</html>

#url_for( )可以加入参数

输入正确用户名

进入主页

点击用户页面进入，url中显示用户名

用户头像

在User类中添加头像位置，修改 app/models.py

from app import db
import ossep=os.sepclass User(db.Model):id = db.Column(db.Integer,primary_key=True)nickname=db.Column(db.String(64),index=True,unique=True)email=db.Column(db.String(120),index=True,unique=True)posts=db.relationship('Post',backref='author',lazy='dynamic')def avatar(self,size):return sep+'static'+sep+'img'+sep+'1.jpg'+' width= '+sizedef is_authenticated (self):return Truedef is_active(self):return Truedef is_anonymous(self):return Falsedef get_id(self):try:       return unicode(self.id)except NameError:return str(self.id)def __repr__(self):return '<User %r>'%(self.nickname)class Post(db.Model):id=db.Column(db.Integer,primary_key=True)body=db.Column(db.String(140))timestamp=db.Column(db.DateTime)user_id=db.Column(db.Integer,db.ForeignKey('user.id'))def __repr__(self):return '<Post %r>'%(self.body)

#在User中自定义avatar( )头像函数，头像图片位置和大小

修改 app/templates/user.html

{% extends "base.html" %}
{% block content %}
<table><tr valign='top'><td><img src={{user.avatar('128')}}></td><td><h1>User：{{user.nickname}} </h1></td></tr>
</table>
<hr>
{% for post in posts %}
<table><tr valign='top'><td><img src={{user.avatar('50')}}></td><td>{{post.author.nickname}}says：<br>{{post.body}}</td></tr>
</table>
{% endfor %}
{% endblock %}

重用子模板

新建模板 app/templates/post.html

<table><tr valign='top'><td><img src={{user.avatar('50')}}></td><td>{{post.author.nickname}}says：<br>{{post.body}}</td></tr>
</table>

#user.avatar('50')头像和大小

修改user.html app/templates/user.html

{% extends "base.html" %}
{% block content %}
<table><tr valign='top'><td><img src={{user.avatar('128')}}></td><td><h1>User：{{user.nickname}} </h1></td></tr>
</table>
<hr>
{% for post in posts %}
{% include 'post.html' %}
{% endfor %}
{% endblock %}

#{% include 'post.html' %} include 插入一个子模板

添加头像以后

用户简介

在模型类User中增加两个字段，最后登入时间和简介，修改 app/models.py

from app import db
import ossep=os.sepclass User(db.Model):id = db.Column(db.Integer,primary_key=True)nickname=db.Column(db.String(64),index=True,unique=True)email=db.Column(db.String(120),index=True,unique=True)posts=db.relationship('Post',backref='author',lazy='dynamic')about_me=db.Column(db.String(140))last_seen=db.Column(db.DateTime)def avatar(self,size):return sep+'static'+sep+'img'+sep+'1.jpg'+' width= '+sizedef is_authenticated (self):return Truedef is_active(self):return Truedef is_anonymous(self):return Falsedef get_id(self):try:       return unicode(self.id)except NameError:return str(self.id)def __repr__(self):return '<User %r>'%(self.nickname)class Post(db.Model):id=db.Column(db.Integer,primary_key=True)body=db.Column(db.String(140))timestamp=db.Column(db.DateTime)user_id=db.Column(db.Integer,db.ForeignKey('user.id'))def __repr__(self):return '<Post %r>'%(self.body)

#新增字段以后，因为没有数据迁移的功能所以要删掉db文件重新建表和加数据

因为要编辑简介所以要form，修改 app/forms.py

from flask.ext.wtf import Form
from wtforms import StringField,BooleanField,TextAreaField
from wtforms .validators import DataRequired,Lengthclass LoginForm(Form):openid=StringField('openid',validators=[DataRequired()])remember_me=BooleanField('remember_me',default=False)class EditForm(Form):nickname=StringField('nickname',validators=[DataRequired()])about_me=TextAreaField('about_me',validators=[Length(min=0,max=140)])
#TextAreaField( )是多行文本输入
#validators=[Length(min=0,max=140)],validators过滤器，输入最小0，最大140

新增个人简介编辑页面 app/edit.html

{% extends "base.html" %}
{% block content %}
<h1>Edit Your Prfile</h1>
<form action="" method="post" name="edit">{{ form.hidden_tag() }}<table><tr><td>Your nickname:</td><td>{{form.nickname(size=24)}}</td></tr><tr><td>About yourself:</td><td>{{form.about_me(cols=32,rows=4)}}</td></tr><tr><td></td><td><input type="submit" value="Save Changes"></td></tr></table>
</form>
{% endblock %}

#form.about_me(cols=32,rows=4)，设置多文本输入框的宽32，高4

#form.nickname(size=24) 输入框大小24

添加视图处理函数，修改 app/views.py

from app import app,db,lm,models
from flask import render_template,flash,redirect,url_for,session,request,g
from .forms import LoginForm, EditForm
from .models import User
from flask.ext.login import login_user,logout_user,current_user,login_required
from datetime import datetime@lm.user_loader
def load_user(id):return User.query.get(int(id))@app.before_request
def before_request():g.user = current_userif g.user.is_authenticated:g.user.last_seen=datetime.utcnow()db.session.add(g.user)db.session.commit()@app.route('/')
@app.route('/index')
@login_required
def index ():user=g.userposts=[{'author':{'nickname':'John'},'body':'Beautiful day in Portland!'},{'author':{'nickname':'Susan'},'body':'The Avengers movie was so cool!'}]return render_template("index.html",title="Home",user=user,posts=posts)@app.route('/login', methods = ['GET', 'POST'])
def login():if g.user is not None and g.user.is_authenticated:return redirect(url_for('index'))form = LoginForm()if form.validate_on_submit():if models.User.query.filter_by(nickname=form.openid.data).first():user = User.query.filter_by(nickname=form.openid.data).first_or_404()login_user(user)return redirect(url_for('index'))else:return render_template('login.html',title = 'Sign In',error='[NO]',form = form)return render_template('login.html',title = 'Sign In',form = form)@app.route('/logout')
@login_required
def logout():logout_user()return redirect(url_for('index'))@app.route('/user/<nickname>')
@login_required
def user(nickname):user=User.query.filter_by(nickname=nickname).first()if user==None:flash('user'+nickname+'not found!')return redirect(url_for('index'))posts=[{'author':user,'body':'Test post #1 !!!'},{'author':user,'body':'Test post #2 !!!'}]return render_template('user.html',user=user,posts=posts)@app.route('/edit',methods=["POST","GET"])
@login_required
def edit():form=EditForm()if form.validate_on_submit():g.user.nickname=form.nickname.datag.user.about_me=form.about_me.datadb.session.add(g.user)db.session.commit()flash('Your changes have been saved!')return redirect(url_for('edit'))else:form.nickname.data=g.user.nicknameform.about_me.data=g.user.about_mereturn render_template('edit.html',form=form)

#修改简介，当submit提交以后将修改的用户名和简介添加进数据库里

点击Edit进入简介页面

用户名从数据库里读取

数据库里nickname还是john，about_me是空

修改用户名，添加简介以后会出现flash信息

再看数据库里用户名被修改，简介被添加

点击个人页面会发现，用户名被修改，简介已经添加

以上就完成了个人信息编辑展现页面，不过有点不习惯的问题

1：编辑完成后还在编辑页面，我觉得跳转到用户页面比较好

2：简介内容不能保持原始输入格式

第一个问题解决方式，修改 app/views.py

@app.route('/edit',methods=["POST","GET"])
@login_required
def edit():form=EditForm()if form.validate_on_submit():g.user.nickname=form.nickname.datag.user.about_me=form.about_me.datadb.session.add(g.user)db.session.commit()flash('Your changes have been saved!')return redirect(url_for('user',nickname=g.user.nickname))else:form.nickname.data=g.user.nicknameform.about_me.data=g.user.about_mereturn render_template('edit.html',form=form)

#修改edit函数的跳转，将原来跳转到edit，改成调到user+nickname的用户页面

第二个问题解决方式

{% extends "base.html" %}
{% block content %}
<table><tr valign='top'><td><img src={{user.avatar('128')}}></td><td><h1>User：{{user.nickname}} </h1>{% if user.about_me %}<pre>{{user.about_me}}</pre>{% endif %}{% if user.last_seen %}<p><i>Last seen on:{{user.last_seen}}</i></p>{% endif %}{% if user.id==g.user.id %}<p><a href="{{url_for('edit')}}">Edit</a></p>{% endif %}</td></tr>
</table>
<hr>
{% for post in posts %}
{% include 'post.html' %}
{% endfor %}
{% endblock %}

#将用户展示页面上简介展示的标签由<p></p>改成<pre></pre>