我是所有编程人员的初学者。我决定使用bootstrap创建一个网站（或者我应该说应用程序？; p）。由于我发现Ruby非常有吸引力，我决定整合这两个框架。所以我这样做了：https://github.com/twbs/bootstrap-rubygem 它很好，我下载了一些引导主题，将所有文件扔到我的应用程序文件，更改index.html.erb中的img路径，当我启动服务器时，我得到一个没有任何图像的网站。我究竟做错了什么？我会赞美任何帮助。
我的index.html.erb（我从模板文件夹中复制）
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<title>Creative - Start Bootstrap Theme</title>
<!-- Bootstrap core CSS -->
<link href="test1/vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<!-- Custom fonts for this template -->
<link href="test1/vendor/font-awesome/css/font-awesome.min.css" rel="stylesheet" type="text/css">
<link href='https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800' rel='stylesheet' type='text/css'>
<link href='https://fonts.googleapis.com/css?family=Merriweather:400,300,300italic,400italic,700,700italic,900,900italic' rel='stylesheet' type='text/css'>
<!-- Plugin CSS -->
<link href="test1/vendor/magnific-popup/magnific-popup.css" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="test1/assets/stylesheets/creative.min.css" rel="stylesheet">
<!-- Navigation -->
<nav class="navbar navbar-expand-lg navbar-light fixed-top" id="mainNav">
<div class="container">
<a class="navbar-brand js-scroll-trigger" href="#page-top">Start Bootstrap</a>
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarResponsive">
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link js-scroll-trigger" href="#about">About</a>
</li>
<li class="nav-item">
<a class="nav-link js-scroll-trigger" href="#services">Services</a>
</li>
<li class="nav-item">
<a class="nav-link js-scroll-trigger" href="#portfolio">Portfolio</a>
</li>
<li class="nav-item">
<a class="nav-link js-scroll-trigger" href="#contact">Contact</a>
</li>
</ul>
</div>
</div>
</nav>
<header class="masthead text-center text-white d-flex">
<div class="container my-auto">
<div class="row">
<div class="col-lg-10 mx-auto">
<h1 class="text-uppercase">
<strong>Your Favorite Source of Free Bootstrap Themes</strong>
</h1>
<hr>
</div>
<div class="col-lg-8 mx-auto">
<p class="text-faded mb-5">Start Bootstrap can help you build better websites using the Bootstrap CSS framework! Just download your template and start going, no strings attached!</p>
<a class="btn btn-primary btn-xl js-scroll-trigger" href="#about">Find Out More</a>
</div>
</div>
</div>
</header>
<section class="bg-primary" id="about">
<div class="container">
<div class="row">
<div class="col-lg-8 mx-auto text-center">
<h2 class="section-heading text-white">We've got what you need!</h2>
<hr class="light my-4">
<p class="text-faded mb-4">Start Bootstrap has everything you need to get your new website up and running in no time! All of the templates and themes on Start Bootstrap are open source, free to download, and easy to use. No strings attached!</p>
<a class="btn btn-light btn-xl js-scroll-trigger" href="#services">Get Started!</a>
</div>
</div>
</div>
</section>
<section id="services">
<div class="container">
<div class="row">
<div class="col-lg-12 text-center">
<h2 class="section-heading">At Your Service</h2>
<hr class="my-4">
</div>
</div>
</div>
<div class="container">
<div class="row">
<div class="col-lg-3 col-md-6 text-center">
<div class="service-box mt-5 mx-auto">
<i class="fa fa-4x fa-diamond text-primary mb-3 sr-icons"></i>
<h3 class="mb-3">Sturdy Templates</h3>
<p class="text-muted mb-0">Our templates are updated regularly so they don't break.</p>
</div>
</div>
<div class="col-lg-3 col-md-6 text-center">
<div class="service-box mt-5 mx-auto">
<i class="fa fa-4x fa-paper-plane text-primary mb-3 sr-icons"></i>
<h3 class="mb-3">Ready to Ship</h3>
<p class="text-muted mb-0">You can use this theme as is, or you can make changes!</p>
</div>
</div>
<div class="col-lg-3 col-md-6 text-center">
<div class="service-box mt-5 mx-auto">
<i class="fa fa-4x fa-newspaper-o text-primary mb-3 sr-icons"></i>
<h3 class="mb-3">Up to Date</h3>
<p class="text-muted mb-0">We update dependencies to keep things fresh.</p>
</div>
</div>
<div class="col-lg-3 col-md-6 text-center">
<div class="service-box mt-5 mx-auto">
<i class="fa fa-4x fa-heart text-primary mb-3 sr-icons"></i>
<h3 class="mb-3">Made with Love</h3>
<p class="text-muted mb-0">You have to make your websites with love these days!</p>
</div>
</div>
</div>
</div>
</section>
<section class="p-0" id="portfolio">
<div class="container-fluid p-0">
<div class="row no-gutters popup-gallery">
<div class="col-lg-4 col-sm-6">
<a class="portfolio-box" href="test1/app/assets/imgages/portfolio/fullsize/1.jpg">
<img class="img-fluid" src="test1/app/assets/imgages/portfoliothumbnails/1.jpg" alt="">
<div class="portfolio-box-caption">
<div class="portfolio-box-caption-content">
<div class="project-category text-faded">
Category
</div>
<div class="project-name">
Project Name
</div>
</div>
</div>
</a>
</div>
<div class="col-lg-4 col-sm-6">
<a class="portfolio-box" href="test1/app/assets/images/portfolio/fullsize/2.jpg">
<img class="img-fluid" src="test1/app/assets/images/portfoliothumbnails/2.jpg" alt="">
<div class="portfolio-box-caption">
<div class="portfolio-box-caption-content">
<div class="project-category text-faded">
Category
</div>
<div class="project-name">
Project Name
</div>
</div>
</div>
</a>
</div>
<div class="col-lg-4 col-sm-6">
<a class="portfolio-box" href="test1/app/assets/images/portfolio/fullsize/3.jpg">
<img class="img-fluid" src="test1/app/assets/images/portfolio/thumbnails/3.jpg" alt="">
<div class="portfolio-box-caption">
<div class="portfolio-box-caption-content">
<div class="project-category text-faded">
Category
</div>
<div class="project-name">
Project Name
</div>
</div>
</div>
</a>
</div>
<div class="col-lg-4 col-sm-6">
<a class="portfolio-box" href="test1/app/assets/imgages/portfolio/fullsize/4.jpg">
<img class="img-fluid" src="test1/app/assets/imgages/portfolio/thumbnails/4.jpg" alt="">
<div class="portfolio-box-caption">
<div class="portfolio-box-caption-content">
<div class="project-category text-faded">
Category
</div>
<div class="project-name">
Project Name
</div>
</div>
</div>
</a>
</div>
<div class="col-lg-4 col-sm-6">
<a class="portfolio-box" href="test1/assets/images/portfoliofullsize/5.jpg">
<img class="img-fluid" src="test1/assets/images/portfoliothumbnails/5.jpg" alt="">
<div class="portfolio-box-caption">
<div class="portfolio-box-caption-content">
<div class="project-category text-faded">
Category
</div>
<div class="project-name">
Project Name
</div>
</div>
</div>
</a>
</div>
<div class="col-lg-4 col-sm-6">
<a class="portfolio-box" href="test1/assets/images/portfolio/fullsize/6.jpg">
<img class="img-fluid" src="test1/assets/images/portfolio/thumbnails/6.jpg" alt="">
<div class="portfolio-box-caption">
<div class="portfolio-box-caption-content">
<div class="project-category text-faded">
Category
</div>
<div class="project-name">
Project Name
</div>
</div>
</div>
</a>
</div>
</div>
</div>
</section>
<section class="bg-dark text-white">
<div class="container text-center">
<h2 class="mb-4">Free Download at Start Bootstrap!</h2>
<a class="btn btn-light btn-xl sr-button" href="http://startbootstrap.com/template-overviews/creative/">Download Now!</a>
</div>
</section>
<section id="contact">
<div class="container">
<div class="row">
<div class="col-lg-8 mx-auto text-center">
<h2 class="section-heading">Let's Get In Touch!</h2>
<hr class="my-4">
<p class="mb-5">Ready to start your next project with us? That's great! Give us a call or send us an email and we will get back to you as soon as possible!</p>
</div>
</div>
<div class="row">
<div class="col-lg-4 ml-auto text-center">
<i class="fa fa-phone fa-3x mb-3 sr-contact"></i>
<p>123-456-6789</p>
</div>
<div class="col-lg-4 mr-auto text-center">
<i class="fa fa-envelope-o fa-3x mb-3 sr-contact"></i>
<p>
<a href="mailto:your-email@your-domain.com">feedback@startbootstrap.com</a>
</p>
</div>
</div>
</div>
</section>
<!-- Bootstrap core JavaScript -->
<script src="test1/vendor/jquery/jquery.min.js"></script>
<script src="test1/vendor/bootstrap/js/bootstrap.bundle.min.js"></script>
<!-- Plugin JavaScript -->
<script src="test1/vendor/jquery-easing/jquery.easing.min.js"></script>
<script src="test1/vendor/scrollreveal/scrollreveal.min.js"></script>
<script src="test1/vendor/magnific-popup/jquery.magnific-popup.min.js"></script>
<!-- Custom scripts for this template -->
<script src="test1/app/assets/javascript/creative.min.js"></script>
答案 0 :(得分：0)
使用帮助程序类：
EST5EDT变为
from datetime import datetime
import pytz
datetime(2018, 3, 8, 9, 30, tzinfo=pytz.timezone('EST5EDT')).astimezone(pytz.utc)
# returns:
# datetime.datetime(2018, 3, 8, 14, 30, tzinfo=<UTC>)
datetime(2018, 3, 12, 9, 30, tzinfo=pytz.timezone('EST5EDT')).astimezone(pytz.utc)
# returns:
# datetime.datetime(2018, 3, 12, 14, 30, tzinfo=<UTC>)
# BUT should return (second Sunday of march the daylight saving changes by 1 hour):
# datetime.datetime(2018, 3, 12, 13, 30, tzinfo=<UTC>)
假设文件 /app/assets/images/portfolio/thumbnails/3.jpg 存在，应该正确设置路径。