Flask静态文件路由中的变量[url_for（'static'，filename =''）] [英] Variable in Flask static files routing [url_for('static', filename='')]

问题描述

我正在制作一个简单的音乐应用程序。
我想让用户上传他们的音频文件，我有一个页面，我打算显示所有的歌曲。
我创建了一个模板，结构如下所示：

  {歌曲中歌曲的百分比％} 
< div class =chart-item> 
< div class =chart-position col-md-1> 
< h3>＃u< / h3> 
< / div> <！ - 图表位置 - > 
< div class =band-logo col-md-2> 
 < / div> <！ -  band-logo  - > 
< div class =band-name-and-autio col-md-9> 
< div class =band-name> {{song ['artistName']}}  -  {{song ['songName']}}< / div> <！ - 带名 - > 
< div class =audio> 
< audio> 
 
< / audio> 
< / div> <！ - 音频 - > 
< / div> <！ -  band-name-and-autio  - > 
< div class =clearfix>< / div> 
< / div> <！ -  chart-item  - > 
 {％endfor％} 
  

这里我想制作一个动态的路径来覆盖图片和一个记录，但我不知道在这里正确地写入文件的路径：

 < img src ={{ url_for（'static'，filename ='uploads / users / {{song ['artistName']}} / {{song ['pathToCover']}}'）}}> 
  

请解释如何去做。我试图找到烧瓶网页上的解决方案，但现在我没有任何结果。

解决方案

相信你可以像这样嵌套模板标签。但是你也不应该需要。

 < img src ={{url_for（'static'，filename ='uploads / users /'）}} { {song ['artistName']}} / {{song ['pathToCover']}}> 
  

你可以从下面的例子中看到这个原理：

 >>> from flask import Flask，url_for 
>>> app = Flask（__ name__）
>>>使用app.test_request_context（）：
 ... print url_for（'static'，filename ='uploads / users /'）
 / static / uploads / users / 
  artistName ， /> 

， pathToCover

I'm making a simple music app. I want to allow users upload their audio files and I have a page where I'm planning to show all songs. I've created a template, and the structure looks like:

{% for song in songs %}
    <div class="chart-item">
        <div class="chart-position col-md-1">
            <h3>#u</h3>
        </div> <!-- chart-position -->
        <div class="band-logo col-md-2">
            <img src="{{ url_for('static', filename='uploads/users/{{ song['artistName'] }}/{{ song['pathToCover'] }}')}}">
        </div> <!-- band-logo -->
        <div class="band-name-and-autio col-md-9">
            <div class="band-name">{{ song['artistName'] }} - {{ song['songName'] }}</div> <!-- band-name -->
            <div class="audio">
                <audio>

                </audio>
            </div> <!-- audio -->
        </div> <!-- band-name-and-autio -->
        <div class="clearfix"></div>
    </div> <!-- chart-item -->
{% endfor %}

Here I want to make a dynamical path to cover image and a record, but I do not know to correctly write the path to the file here:

<img src="{{ url_for('static', filename='uploads/users/{{ song['artistName'] }}/{{ song['pathToCover'] }}')}}">

Please, explain how to do it. I've tried to find the solution on flask web page, but for now I have no any result.

解决方案

I don't believe you can nest template tags like that. But you also shouldn't need to.

<img src="{{ url_for('static', filename='uploads/users/') }}{{ song['artistName'] }}/{{ song['pathToCover'] }}">

You can see why this works from the following example:

>>> from flask import Flask, url_for
>>> app = Flask(__name__)
>>> with app.test_request_context():
...    print url_for('static', filename='uploads/users/')
/static/uploads/users/

So then you just need to add the artistName, /, pathToCover

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