python使用Flask操作mysql实现登录功能

DEBUG = True 
SQLALCHEMY_ECHO = False 
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:1011@localhost/rl_project?charset=utf8' 
SECRET_KEY = '*\xff\x93\xc8w\x13\x0e@3\xd6\x82\x0f\x84\x18\xe7\xd9\\|\x04e\xb9(\xfd\xc3'
common/_init_.py
# config=utf-8 
from flask_sqlalchemy import SQLAlchemy 
__all__ = ['db'] 
db = SQLAlchemy()

# config=utf-8 
from sqlalchemy import create_engine 
from sqlalchemy.sql import text 
from config import SQLALCHEMY_DATABASE_URI, SQLALCHEMY_ECHO 
def db_query(sql, settings=None, echo=None): 
 if settings is None: 
  settings = SQLALCHEMY_DATABASE_URI 
 if echo is None: 
  echo = SQLALCHEMY_ECHO 
 return create_engine(settings, echo=echo).connect().execute(text(sql)).fetchall() 
def db_execute(sql, settings=None, echo=None): 
 if settings is None: 
  settings = SQLALCHEMY_DATABASE_URI 
 if echo is None: 
  echo = SQLALCHEMY_ECHO 
 return create_engine(settings, echo=echo).connect().execute(text(sql)).rowcount

# config=utf-8 
from flask_wtf import FlaskForm as Form 
from wtforms import StringField, PasswordField 
from wtforms.validators import DataRequired 
class LoginForm(Form): 
 accountNumber = StringField('accountNumber', validators=[DataRequired('accountNumber is null')]) 
 password = PasswordField('password', validators=[DataRequired('password is null')])

# config=utf-8 
from flask import Flask 
from flask_login import LoginManager 
from common import db 
login_manager = LoginManager() 
login_manager.login_view = "user.login" 
def create_app(config_filename=None): 
 app = Flask(__name__) 
 login_manager.init_app(app) 
 if config_filename is not None: 
  app.config.from_pyfile(config_filename) 
  configure_database(app) 
 return app 
def configure_database(app): 
 db.init_app(app)

# config=utf-8 
from flask_login import UserMixin 
from common import db 
class User(db.Model, UserMixin): 
 user_id = db.Column('id', db.Integer, primary_key=True) 
 accountNumber = db.Column(db.String(200), unique=True) 
 password = db.Column(db.String(50), unique=True) 
 name = db.Column(db.String(20), unique=True) 
 __tablename__ = 'tb_user' 
 def __init__(self, user_id=None, account_number=None, password=None, name="anonymous"): 
  self.user_id = user_id 
  self.accountNumber = account_number 
  self.password = password 
  self.name = name 
 def is_authenticated(self): 
  return True 
 def is_active(self): 
  return True 
 def is_anonymous(self): 
  return False 
 def get_id(self): 
  return unicode(self.user_id) 
 def __repr__(self): 
  return '<User %r>' % (self.accountNumber)

def get_id(self): 
  return unicode(self.user_id)

#encoding:utf-8 
#!/usr/bin/env python 
from flask import render_template, request, redirect, Flask, Blueprint 
from flask_login import login_user, login_required 
from model.user_model import User 
from model import login_manager 
from form.login_form import LoginForm 
userRoute = Blueprint('user', __name__, url_prefix='/user', template_folder='templates', static_folder='static') 
@login_manager.user_loader 
def load_user(user_id): 
 return User.query.get(int(user_id)) 
@userRoute.before_request 
def before_request(): 
 pass 
@userRoute.route('/success') 
@login_required 
def index(): 
 return render_template('success.html') 
@userRoute.route('/login', methods=['GET', 'POST']) 
def login(): 
 form = LoginForm() 
 if request.method == 'POST': 
  if not form.validate_on_submit(): 
   print form.errors 
   return render_template('login.html', form=form) 
  user = User.query.filter(User.accountNumber == form.accountNumber.data, 
         User.password == form.password.data).first() 
  if user: 
   login_user(user) 
   return render_template('success.html') 
 return render_template('login.html', form=form)

# config=utf-8 
from login import userRoute 
from model import create_app 
DEFAULT_MODULES = [userRoute] 
app = create_app('../config.py') 
for module in DEFAULT_MODULES: 
 app.register_blueprint(module) 
@app.before_request 
def before_request(): 
 pass 
if __name__ == '__main__': 
 app.run(debug=True)
DEFAULT_MODULES = [userRoute]是将userRoute蓝图注册入app，才能启动login中的userRoute路由，我们在login.py中使用了蓝图：userRoute = Blueprint('user', __name__, url_prefix='/user', template_folder='templates', static_folder='static')
@app.before_request 
def before_request(): 
 pass

<!DOCTYPE html> 
<html lang="cn"> 
<head> 
 <meta charset="UTF-8"> 
 <title>{% block title %}{% endblock %}</title> 
 <script src="{{ url_for('static', filename='jquery1.42.min.js') }}"></script> 
 {% block head %}{% endblock %} 
</head> 
<body> 
{% block content %}{% endblock %} 
</body> 
</html>

{% extends "base.html" %} 
{% block title %}python flask user page{% endblock %} 
{% block head %} 
 <style type="text/css"></style> 
{% endblock %} 
{% block content %} 
 <form action="{{ url_for('user.login') }}" method="post"> 
  {% if form.errors %} 
   <ul> 
    {% for name, errors in form.errors.items() %} 
     {% for error in errors %} 
      <li>{{ error }}</li> 
     {% endfor %} 
    {% endfor %} 
   </ul> 
  {% endif %} 
  账号：{{ form.accountNumber(size=20) }}<label>{{ form.accountNumber.errors[0] }}</label><br/> 
  密码：<input name="password" type="password"/><br/> 
  {{ form.hidden_tag() }} 
  <button type="submit">登录</button> 
 </form> 
{% endblock %}