如何在模板中请求文件列表的GET参数?(Django Zip File Download Issue) [英] How to request GET parameters in templates for a list of files?(Django Zip File Download Issue)
问题描述
我想通过压缩方式下载该功能创建的所有单个或多个文件.
I want to download all the single or multiple files created by the function by zipping them.
问题出在模板上.请正确建议为文件列表传递GET参数我遇到了错误:
The problem is with templates. Please suggest properly to pass the GET parameters for a list of files I got an error :
FileNotFoundError at /test/
[Errno 2] No such file or directory: '['
这是错误地放置引用文件列表的查询字符串的错误.
This is the error for improperly placing the query string that is referring to the list of files.
我的看法如下:
def submit(request):
def file_conversion(input_file,output_file_pattern,chunk_size):
output_filenames = []
with open(input_file,"r+") as fin:
# ignore headers of input files
for i in range(1):
fin.__next__()
reader = csv.reader(fin, delimiter=',')
for i, chunk in enumerate(chunked(reader, chunk_size)):
output_filename = output_file_pattern.format(i)
with open(output_filename, 'w', newline='') as fout:
output_filenames.append(output_filename)
writer = csv.writer(fout, reader, delimiter='^')
writer.writerow(fed_headers)
writer.writerows(chunk)
# print("Successfully converted into", output_file)
return output_filenames
paths = file_conversion(input_file,output_file+'{01}.csv',10000)
# paths return a list of filenames that are created like output_file1.csv,output_file2.csv can be of any limit
# when i tried paths[0], it returns output_file1.csv
context = {'paths' :paths}
def test_download(request):
paths = request.GET.get('paths')
context ={'paths': paths}
response = HttpResponse(content_type='application/zip')
zip_file = zipfile.ZipFile(response, 'w')
for filename in paths:
zip_file.write(filename)
zip_file.close()
response['Content-Disposition'] = 'attachment; filename='+'converted files'
return response
模板
<p>
<a href ="{% url 'test_download' %}?paths={{ paths|urlencode }} " download>Converted Files</a> </p>
<br>
帮我在这里找到问题.
问题:
?path正在寻找文件,但找到了列表.
the ?path is looking for file but it has found the list.
然后我尝试:
def test_download(request):
paths = request.GET.getlist('paths')
context ={'paths': paths}
response = HttpResponse(content_type='application/zip')
zip_file = zipfile.ZipFile(response, 'w')
for filename in paths:
zip_file.write(filename)
zip_file.close()
response['Content-Disposition'] = 'attachment; filename='+'converted files'
return response
模板:
<p> <a href ="{% url 'test_download' %}?paths=path1 " download>Converted Files</a> </p>
<br>
它将文件查找为
FileNotFoundError at /test/
[Errno 2] No such file or directory: '/home/rikesh/Projects/FedMall/main/temp/47QSHA19D003A_UPDATE_20210113_{:01}.csv'
文件路径应为:
/home/rikesh/Projects/FedMall/main/temp/47QSHA19D003A_UPDATE_20210113_0.csv
推荐答案
request.GET.get('paths')
返回路径列表的字符串表示形式,而不是列表对象.返回的值将类似于此" [['/path/file1','path/file2']"
.当您遍历路径时,它实际上遍历了字符串中的每个字符.这就是为什么它首先尝试查找名称为 [
.
request.GET.get('paths')
returns a string representation of your list of paths, not a list object. The returned value would be like this "['/path/file1', 'path/file2']"
. When you iterate through paths, it actually iterates through each char in your string. That is why it first tries to find a directory with the name [
.
要将文件路径列表传递给 GET
请求,您需要将网址更改为此
To pass a list of file paths to a GET
request, you would need to change your url to this
<your_url>?paths=path1&paths=path2&paths=path3...
在您的Python代码中,以此获取文件路径
In your Python code, get the file paths with this
request.GET.getlist('paths')
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