[patch] repr(uploadfile) should not contain the file content

[Jeong-Min Lee <falsetru@…>]

If uploadfilecontent is very long, repr(uploadfile) produce non-readable stuff.
It sometimes make a browser hang.

A significant performance problem occur on following scenario.

1. You have a model that has many nullable/blankable fields with a FileField.
2. You upload big file, without filling nullable fields.
3. In view, manipulator.save is called.
4. for each field, validation is called.
5. for nullable field, while getting field from new_data, repr(new_data) is called, which trigger repr(upload_file)
6. repr(upload_file) is very long. It is called for each nullable field. this take long time. (taked 4s~12s for my app)

Sorry for my poor explanation.

[Jeong-Min Lee <falsetru@…>]

suppress uploadfilecontent's display.

[Bastian Kleineidam <calvin@…>]

I think it would be helpful to at least display some content of the file, eg. the first 40-60 characters.
Something like this would work:

clen = len(filedict["content"])
if clen > 40:
    suffix = "... and %d more" % (clen - 40)
    copy["content"] = filedict["content"][:40] + suffix

[Øyvind Saltvik <oyvind@…>]

Fixed in [5874]