Question

当我在Django的视图中上传文件时，我试图调整大小（创建有效的缩略图）并重命名文件。我看到了库PIL并且正在使用它，但没有结果。

views.py

from django.shortcuts import render
from django.contrib.auth.decorators import login_required
from django.core.files.storage import FileSystemStorage
from django.urls import reverse
from PIL import Image

@login_required
def zoom(request):
    uploaded_url = {}
    if request.method == 'POST' and request.FILES.getlist('document', False):
        myfiles = request.FILES.getlist('document')
        for myfile in myfiles:
            fs = FileSystemStorage()
            filename = fs.save(myfile.name, myfile)
            uploaded_file_url = fs.url(filename)
            uploaded_url[filename] = uploaded_file_url
            imagen = ((Image.open(myfile)).resize((191,176))).save("thumb.png")
    return render(request, "visores/acercamiento.html", {
        'uploaded_url' : uploaded_url,
    })

acercamiento.html

<form enctype="multipart/form-data" method="post">
    {% csrf_token %}
    <h4>Búsqueda general</h4>
    <input type="file" name="document" accept="image/*" id="b">
    <button type="submit" id="subir">Subir imagen</button>
</form>
{% if uploaded_url %}
    {% for name, url in uploaded_url.items %}
        {% load static %}
        <div id="bai">
            <a class="magnifier-thumb-wrapper demo" href="{{ url }}"> 
            <img id="thumb2" src='http://127.0.0.1:8000/media/thumb.png'>
            </a>
        </div>
    {% endfor %}
{% endif %}

预期结果： /media/P1565.png /media/thumb.png

实际结果： /media/P1565.png

Answer 1

那是因为您没有将新保存的缩略图的URL返回到模板中。

filename = fs.save(myfile.name, myfile)  # you're saving "P1565.png";
uploaded_file_url = fs.url(filename)  # you're getting the URL for "P1565.png";
uploaded_url[filename] = uploaded_file_url  # the URL value is "/media/P1565.png";

因此，在调整大小并保存后，应将upload_url值设置为thumb.png URL。

thumb_url = os.path.join(os.path.dirname(uploaded_file_url), 'thumb.png')  # specify your thumbnail URL;
imagen = ((Image.open(myfile)).resize((191,176))).save('thumb.png')  # re-size and save your thumbnail to the corresponding path;
uploaded_url[filename] = thumb_url  # assign the new URL as the new value;

Answer 2

我解决了！感谢@Viktor Petrov，这是将代码保存在地毯“媒体”中的部分代码：

thumb_url = os.path.join(os.path.dirname(uploaded_file_url), 'thumb.png')  # specify your thumbnail URL;
imagen = (Image.open(myfile)).resize((191,176),Image.ANTIALIAS).save(os.path.join(MEDIA_ROOT,'thumb.png')) # re-size and save your thumbnail to the corresponding path;            
uploaded_url['thumb.png'] = thumb_url

我在上传图像时如何调整其大小并重命名？

2 个答案: