django 循环 static 文件目录

Question

Iam trying to loop thru images in static/folder. I can loop thru images in main 'static' folder but when i put them in 'static/folder' iam not sure how to do it in html.

my html lines(works when img in main 'static' folder)

{% for file in files %}
    <img src=" {% static file %}" height="800">
    <p>File name:{{ file }}</p>
{% endfor %}

my views.py

def album1(request):
    images = '/home/michal/PycharmProjects/Family/gallery/static/'
    files = os.listdir(os.path.join(images))
    context = {'files': files}
    return render(request, 'gallery/album1/main.html', context)

If i change views to:

def album1(request):
    images = '/home/michal/PycharmProjects/Family/gallery/static/'
    files = os.listdir(os.path.join(images, 'folder'))
    context = {'files': files}
    return render(request, 'gallery/album1/main.html', context)

It loops filenames in 'static/folder/' as expected, but then i cant figure out how to change it in html,as its adding file names to: /static/{{ file }} instead to /static/folder/{{ file }}. I think iam missing something or something need changing in load static on this particular page?

{% load static %}                 # either here 
<img src=" {% static file %}">    # or here?

Answer 1

You prepend the filenames with the name of the folder:

from os.path import 

def album1(request):
    images = '/home/michal/PycharmProjects/Family/gallery/static/'
    files = os.listdir(join(images, 'folder'))
    context = {'files': [ for file in files]}
    return render(request, 'gallery/album1/main.html', context)

You can slice in the template with the |slice template filter [Django-doc] :

{% for file in files %}
    <img src=" {% static file %}" height="800">
    <p>File name:{{ file }}</p>
{% endfor %}

But it is more efficient to do this in the view, since you save cycles on by performing less join calls, and furthermore the templates are less efficient than Python code.