instance.content.url should return empty string if no file associated

[Jesaja Everling]

Hello everybody.
Due to the File storage refactoring, urls of ImageFields can now be retrieved not by using

instance.get_content_url(),
but rather by

instance.content.url

At the moment, if there is no file associated with the FileField, an exception is thrown.
In my opinion, this is not optimal.
Previously, you could do something like this in the template:

{% if instance.get_content_url %}
<img src="/userimages/instance.get_content_url">
{% else %}
<img src="/userimages/default.jpg">
{% endif %}

If you try to do this with instance.content.url, you get an exception.
I think it would be better, if just an empty string would be returned.

$DJANGOPATH\db\models\fields\files.py line 55

        self._require_file()

should become something like that:

        try:
            self._require_file()
        except:
            return ""

This probably isn't the most elegant way to do this, but it seems to work...

[Jesaja Everling]

diff for /django/db/models/fields/files.py

[Jesaja Everling]

Apparently I didn't have enough sleep the last days! :)
This works just fine:

{% if instance %}
<img src="/userimages/instance.get_content_url">
{% else %}
<img src="/userimages/default.jpg">
{% endif %}

So please just ignore this ticket.
Sorry for the false report.