Django: Copy FileFields

Question

I'm trying to copy a file using a hardlink, where the file is stored as a Django FileField. I'd like to use a hardlink to save space and copy time (no changes are expected to be made to the original file or copy). However, I'm getting some odd errors when I try to call new_file.save() from the snippet below. ``` AttributeError: 'file' object has no attribute '_committed' ``` My thinking is that after making the hardlink, I can just open the linked file and store it to the Django new File instance's FileFile. Am I missing a step here or something? models.py ``` class File(models.Model): stored_file = models.FileField() ``` elsewhere.py ``` import os original_file = File.objects.get(id=1) original_file_path = original_file.file.path new_file = File() new_file_path = '/path/to/new/file' os.makedirs(os.path.realpath(os.path.dirname(new_file_path))) os.link(original_file_path, new_file_path) new_file.stored_file = file(new_file_path) new_file.save() ```

Accepted Answer

There is no need to create hardlink, just duplicate the file holder:

```
new_file = File(stored_file=original_file.stored_file)
new_file.save()
```

update

If you want to specify file to FileField or ImageField, you could simply

```
new_file = File(stored_file=new_file_path)
# or
new_file = File()
new_file.stored_file = new_file_path
# or
from django.core.files.base import File
# from django.core.files.images import ImageFile # for ImageField
new_file.stored_file = File(new_file_path)
```

the field accepts path in basestring or File() instance, the code in your question uses file() and hence is not accepted.

Django: Copy FileFields

Solution

Problem