接上一次的內容繼續完善,今天完成的內容不是不少,只是簡單的用戶註冊登陸,內容具體以下html
此次要加入與數據哭交互的操做,因此首先要創建相關表結構,這裏使用flask-sqlalchemy來輔助建立vue
首先修改以前的init文件爲:html5
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
from web_chatroom.models import *
from web_chatroom.auth import auth
from web_chatroom.chat import chat
def create_app():
app = Flask(__name__)
app.register_blueprint(auth)
app.register_blueprint(chat)
# 添加配置
app.config.from_object('web_chatroom.settings.DebugConfig')
# 讀取配置
db.init_app(app)
return app
這是爲了引入SQLAlchemy()對象db,並讀取相關的配置,首先要注意的是db = SQLAlchemy()必需要在from web_chatroom.auth import auth以前,由於我在auth.py中使用了db,因此必需要在db建立以後,同時,models是建立的數據庫表結構,也要引入內存當中。python
接下來看一下配置文件settings,只是一個很簡單的配置:mysql
class DebugConfig():
DEBUG = True
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:******@127.0.0.1:3306/webChatroom'
SECRET_KEY = 'webchatroom'
主要是在這裏先把數據庫url配置好web
而後是表結構models目前只有user表sql
from web_chatroom import db
class User(db.Model):
id = db.Column(db.Integer,primary_key=True,autoincrement=True)
email = db.Column(db.String(256),unique=True,nullable=False)
username = db.Column(db.String(32),unique=True,nullable=False)
password_hash = db.Column(db.String(128))
爲了可以像django同樣可以執行數據庫遷移的操做,咱們使用flask-migrate來維護數據庫遷移的版本,因而將以前的app.py修改:數據庫
from web_chatroom import create_app,db
from flask_script import Manager
from flask_migrate import Migrate,MigrateCommand
app = create_app()
manager = Manager(app)
migrate = Migrate(app,db)
manager.add_command('db',MigrateCommand)
if __name__ == '__main__':
manager.run()
這樣就能夠經過執行django
python app.py db initflask
python app.py db migrate
python app.py db upgrate
完成數據庫的遷移
那麼相關數據庫的創建已完成,接下來能夠完善用戶的註冊登陸了
爲了輔助表單驗證,先創建了utils文件夾,並在其中創建forms.py保存了wtforms的相關form類:
from wtforms import Form
from wtforms.fields import simple,html5
from wtforms import validators
from wtforms import widgets
class LoginForm(Form):
username = simple.StringField(
validators=[
validators.DataRequired(message='用戶名不能爲空.')
],
widget=widgets.TextInput(),
)
password = simple.PasswordField(
validators=[
validators.DataRequired(message='密碼不能爲空.'),
validators.Length(min=8, message='密碼長度必須大於%(min)d'),
],
widget=widgets.PasswordInput(),
)
class RegisterForm(Form):
username = simple.StringField(
validators=[
validators.DataRequired(message='用戶名不能爲空.')
],
widget=widgets.TextInput(),
)
password = simple.PasswordField(
validators=[
validators.DataRequired(message='密碼不能爲空.'),
validators.Length(min=8, message='密碼長度必須大於%(min)d'),
],
widget=widgets.PasswordInput(),
)
email = html5.EmailField(
label='郵箱',
validators=[
validators.DataRequired(message='郵箱不能爲空.'),
validators.Email(message='郵箱格式錯誤')
],
widget=widgets.TextInput(input_type='email'),
)
接下來修改一下登陸與註冊的html頁面,具體代碼就不放了,而後在auth.py中的視圖函數中處理驗證:
from flask import render_template,flash,redirect,url_for
from flask import request
from web_chatroom import models
from web_chatroom import db
import hashlib
from utils import forms
auth = Blueprint('auth', __name__)
@auth.route('/login', methods=['GET', "POST"],endpoint='login')
def login():
if request.method == 'GET':
return render_template('login.html')
elif request.method == 'POST':
form = forms.LoginForm(formdata=request.form)
if form.validate():
password_hash = hashlib.md5(form.data['password'].encode('utf-8')).hexdigest()
count = db.session.query(models.User).filter(db.and_(models.User.username == form.data['username'],
models.User.password_hash == password_hash)).count()
if count:
return redirect(url_for('chat.chat'))
else:
flash('用戶名或密碼錯誤')
return redirect(url_for('auth.login'))
pass
else:
for error in form.errors:
flash(form.errors[error][0])
return redirect(url_for('auth.login'))
@auth.route('/register', methods=['GET', "POST"],endpoint='register')
def register():
if request.method == 'GET':
return render_template('register.html')
elif request.method == 'POST':
form = forms.RegisterForm(formdata=request.form)
if form.validate():
count = db.session.query(models.User).filter(db.or_(models.User.username == form.data['username'],
models.User.email == form.data['email'])).count()
if count:
flash('用戶名或郵箱已存在')
return redirect(url_for('auth.register'))
else:
password_hash = hashlib.md5(form.data['password'].encode('utf-8')).hexdigest()
db.session.add(models.User(username=form.data['username'],
email=form.data['email'],
password_hash=password_hash))
db.session.commit()
db.session.close()
flash('註冊成功')
return redirect(url_for('auth.login'))
else:
for error in form.errors:
flash(form.errors[error][0])
return redirect(url_for('auth.register'))
驗證的錯誤信息經過flash在頁面顯示,像這樣:
註冊同理,最後登陸成功會跳轉到chat.html頁面,chat.py中的視圖函數就只先寫了個顯示:
from flask import Blueprint
from flask import render_template,flash,redirect,url_for
from flask import request
chat = Blueprint('chat', __name__)
@chat.route('/chat', methods=['GET', "POST"],endpoint='chat')
def chatroom():
if request.method == 'GET':
return render_template('chatroom.html')
固然頁面裏目前什麼也沒有。。。
最後,當前項目的目錄結構是這樣的:
今天主要完成了簡單的數據庫交互,明天繼續加入cookie,session,以及csrf的保護,以及chat的頁面,消息表等。。