Flask 项目的开发经验总结

# -*- coding: utf-8 -*-  
from __future__ import absolute_import from app import app  app.run()

# -*- coding: utf-8 -*-  
from __future__ import absolute_import import os from datetime import timedelta _basedir = os.path.abspath(os.path.dirname(__file__))  DEBUG = True  SECRET_KEY = os.urandom(24) PERMANENT_SESSION_LIFETIME=timedelta(seconds=24*60*60)  CSRF_ENABLED = True CSRF_SESSION_KEY = SECRET_KEY  

# -*- coding: utf-8 -*-  
from __future__ import absolute_import from flask import Flask, g, render_template, send_from_directory import os import os.path _basedir = os.path.abspath(os.path.dirname(__file__)) configPy=os.path.join(os.path.join( _basedir,os.path.pardir), 'config.py')  app = Flask(__name__)  # create our application object
 app.config.from_pyfile(configPy) #app.debug=True  #change some attribute after load configuration
  flask_sqlalchemy_used=True  # 如果使用Flask-SQLAlchemy了
db = SQLAlchemy(app) #create a db (SQLAlchemy) object from our app object
 login_manager = LoginManager(app) #create a LoginManager Object from our app object #add our view as the login view to finish configuring the LoginManager
login_manager.login_view = "users.login_view"

#register the users module blueprint
from app.users.views import mod as usersModule app.register_blueprint(usersModule)   #register the tickets module blueprint
from app.tickets.views import mod as ticketsModule app.register_blueprint(ticketsModule)   def connect_db():  # 如果没使用Flask-SQLAlchemy
    if not flask_sqlalchemy_used:         return sqlite3.connect('/path/to/database.db')     else:         return None                       @app.before_request def before_request():     """Make sure we are connected to the database each request."""
    if not flask_sqlalchemy_used:         g.db = connect_db()   @app.teardown_request def teardown_request(response):     """Closes the database again at the end of the request."""
    if not flask_sqlalchemy_used:         g.db.close()     return response                   #***************** # controllers #*****************
 @app.route('/favicon.ico') def favicon():     return send_from_directory(os.path.join(app.root_path, 'static'), 'ico/favicon.ico')  @app.errorhandler(404) def page_not_found(e):     return render_template('404.html'), 404  @app.route("/") def index():     return render_template('index.html')

# -*- coding: utf-8 -*-  
from __future__ import absolute_import from flask import Blueprint, render_template, flash, redirect, session, url_for, request, g from flask.ext.login import login_user, logout_user, login_required from app import app, db, login_manager from forms import LoginForm, RegistrationForm from app.users.models import User  mod = Blueprint('users', __name__) #register the users blueprint module
 @login_manager.user_loader def load_user(user_id):     return User.query.get(user_id)  @mod.route('/login/', methods=('GET', 'POST')) def login_view():     form = LoginForm(request.form)     if form.validate_on_submit():         user = form.get_user()         login_user(user)         flash("Logged in successfully.")         return redirect(request.args.get("next") or url_for("index"))     return render_template('users/login.html', form=form)  @mod.route('/register/', methods=('GET', 'POST')) def register_view():     form = RegistrationForm(request.form)     if form.validate_on_submit():         user = User()         form.populate_obj(user)         db.session.add(user)   #使用SqlAlchemy保存
        db.session.commit()         login_user(user)         return redirect(url_for('index'))     return render_template('users/register.html', form=form)  @login_required @mod.route('/logout/') def logout_view():     logout_user()     return redirect(url_for('index'))

{% macro form_field(field) -%}     {% set with_label = kwargs.pop('with_label', False) %}     {% set placeholder = '' %}     {% if not with_label %}         {% set placeholder = field.label.text %}     {% endif %}     <div class="control-group {% if field.errors %}error{% endif %}">         {% if with_label %}             <label for="{{ field.id }}" class="control-label">                 {{ field.label.text }}{% if field.flags.required %} *{% endif %}:             label>         {% endif %}         <div class="controls">             {% set class_ = kwargs.pop('class_', '') %}             {% if field.flags.required %}                 {% set class_ = class_ + ' required' %}             {% endif %}             {% if field.type == 'BooleanField' %}                 <label class="checkbox">                     {{ field(class_=class_, **kwargs) }}                     {{ field.label.text|safe }}                 label>             {% else %}                 {% if field.type in ('TextField', 'TextAreaField', 'PasswordField') %}                     {% set class_ = class_ + ' input-xlarge' %}                 {% elif field.type == 'FileField' %}                     {% set class_ = class_ + ' input-file' %}                 {% endif %}                  {% if field.type == 'SelectField' %}                   {{ field(class_=class_, **kwargs) }}                 {% else %}                   {{ field(class_=class_, placeholder=placeholder, **kwargs) }}                 {% endif %}              {% endif %}             {% if field.errors %}                 <span class="error help-inline">{{ field.errors|join(', ') }}span>             {% endif %}             {% if field.description %}                 <p class="help-block">{{ field.description|safe }}p>             {% endif %}         div>
    div> {%- endmacro %}