Django：如何使用pdf2image將pdf文件object轉為圖片？

Question

我正在嘗試創建一個 epaper web 應用程序，管理員可以在其中上傳 pdf 格式的文件，並在從客戶端呈現頁面時將其轉換為圖像。 我試過 pdf2image 但得到這樣的錯誤：

PDFPageCountError at /city_list
Unable to get page count.
I/O Error: Couldn't open file '['/media/pdf/Akola/2020/04/24/page01.pdf']': No such file or directory.

這是我的代碼：

模型.py

class City(models.Model):
    cityid =models.AutoField(primary_key=True)
    name = models.CharField( max_length=50)
def user_directory_path(instance, filename):
# file will be uploaded to MEDIA_ROOT/user_<id>/<filename>
ab = instance.date.strftime("%Y/%m/%d")
return 'pdf/{0}/{1}/{2}'.format(instance.city.name,ab, filename)

class DailyFeed(models.Model):
    city = models.ForeignKey(City, on_delete=models.CASCADE)
    date =models.DateField(auto_now=False, auto_now_add=False)
    page1  = models.FileField(upload_to=user_directory_path)
    page2 = models.FileField(upload_to=user_directory_path) 
    page3 = models.FileField(upload_to=user_directory_path)

意見.py：

def city(request):
    city_list = City.objects.all()

    daily = DailyFeed.objects.filter(date=timezone.now().date()).filter(city__name = "Akola")
    ab = [pdfurl.page1.url for pdfurl in daily ]
    path = r'{}'.format(ab)
    a = str(path)
    pages = convert_from_path('{}'.format(a), 200)
    for pdf in pages:
        pdf.save('{}.jpg'.format(a.name[:-4]), 'JPEG')
    return render (request,'main.html',{'city_list':city_list,'page':pdf})

網址.py

re_path(r'^city_list',views.city,name='city'),

我沒有得到我要去哪里錯了？

Answer 1

使用路徑而不是 url。URL 不是文件所在的位置，而是瀏覽器如何訪問它

[pdfurl.page1.url for pdfurl in daily ]

到

[pdfurl.page1.path for pdfurl in daily ]