Opened 15 years ago
Closed 15 years ago
#10749 closed (duplicate)
ImageField is a string in the lookup api
| Reported by: | Owned by: | nobody | |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | 1.0 |
| Severity: | Keywords: | ImageField | |
| Cc: | Triage Stage: | Unreviewed | |
| Has patch: | no | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
I was trying to retrieve objects which didn't have the image attribute (an ImageField) set yet, so i tried with MyModel.objects.filter(image=None). It didn't match any entry... image__isnull didn't work as well. Then i found out that I had to do MyModel.objects.filter(image=""). So basically it seems that the ImageField is exposed as a string, as far as the lookup api is concerned. (I'm not familiar with django enough to look into django's source code to confirm this). It doesn't seem like a consistent behaviour to me, since the imagefields are high-level objects when accessed from instances.
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This is really the same as #10244. Searching for None doesn't work because there is no way for NULL to be stored as the "empty" value for a FileField, the empty string is always used as the value.