Optimize handling of attributes #334
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* Implemented faster attributes save * renamed for clarity
…ct to avoid transferring (#331) attributesvalues from parent to child.
Use the same database as the passed-in manager
* The image and file fields where nolonger working. This PR restores that functionality. * nergens voor
When an image product attribute is `null`, the product API would throw the
following exception:
```
ValueError: The 'value_image' attribute has no file associated with it.
[…]
File "rest_framework/serializers.py", line 522, in to_representation
ret[field.field_name] = field.to_representation(attribute)
File "rest_framework/serializers.py", line 686, in to_representation
return [
File "rest_framework/serializers.py", line 687, in <listcomp>
self.child.to_representation(item) for item in iterable
File "rest_framework/serializers.py", line 522, in to_representation
ret[field.field_name] = field.to_representation(attribute)
File "oscarapi/serializers/fields.py", line 227, in to_representation
return value.value.url
File "django/db/models/fields/files.py", line 66, in url
self._require_file()
File "django/db/models/fields/files.py", line 41, in _require_file
raise ValueError(
```
This patch fixes this by checking if the image field has a value before trying
to generate a URL.
Fixes handling of null product image attributes
Add category bulk admin api
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