[ckan-dev] Some default previews always created?

Adrià Mercader adria.mercader at okfn.org
Fri May 8 08:57:16 UTC 2015

Well, Philippe beat me to it!


On 8 May 2015 at 09:56, Adrià Mercader <adria.mercader at okfn.org> wrote:
> This is weird, it definitely looks like is trying to create a resource
> view and failing because a "Name" field is not present, but resource
> views don't require a "name" field at all.
> Perhaps there is some mixup with schemas and the dataset one is
> leaking into the context. Definitely something we should check. Is
> this the CKAN harvester?
> As for why it's trying to create a view, make sure to leave
> ckan.views.default_views empty (not commented):
> "If not present (or commented), the default value is used. If left
> empty, no default views are created."
> http://docs.ckan.org/en/latest/maintaining/configuration.html#ckan-views-default-views
> On 8 May 2015 at 08:29, Matthew Fullerton <matthew at smartlane.de> wrote:
>> I'm having a weird and wonderful problem involving harvesting. I harvest 2963 datasets, and 3 of them cause an error (cryptic of course, implying that there is no name value, even though there is). After a lot of digging, I see it is because my resources (which only have one key - 'url', which is enough for a standard CKAN entry) have no name key, and this is upsetting (99% certain) the image preview when it tries to become created. These 3 datasets seem to be the only ones with .jpg resources. This is the stack trace:
>> Traceback (most recent call last):
>>   File "/usr/lib/ckan/default/src/ckanext-harvest/ckanext/harvest/harvesters/base.py", line 221, in _create_or_update_package
>>     new_package = get_action('package_create_rest')(context, package_dict)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 424, in wrapped
>>     result = _action(context, data_dict, **kw)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/action/create.py", line 1115, in package_create_rest
>>     dictized_after = _get_action('package_create')(context, dictized_package)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 424, in wrapped
>>     result = _action(context, data_dict, **kw)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/action/create.py", line 212, in package_create
>>     context, {'package': data})
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 424, in wrapped
>>     result = _action(context, data_dict, **kw)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/action/create.py", line 465, in package_create_default_resource_views
>>     create_datastore_views=create_datastore_views)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/lib/datapreview.py", line 303, in add_views_to_dataset_resources
>>     create_datastore_views)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/lib/datapreview.py", line 269, in add_views_to_resource
>>     view)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 424, in wrapped
>>     result = _action(context, data_dict, **kw)
>>   File "/usr/lib/ckan/default/src/ckan/ckan/logic/action/create.py", line 363, in resource_view_create
>>     raise ValidationError(errors)
>> ValidationError: None - {'name': ['Missing value']}
>> However, I haven't included ANY resource views in my plugins list, and the I don't set the list of default views to create either. The docs imply that the image preview has to be added explicitly as a plugin - is this really the case?
>> I'm not sure if its good that resource previews are allowed to have a stricter schema for validation than that of the dataset itself, but that's a separate issue. Right now I would just like to prevent 'package_create_default_resource_views' ever getting called.
>> I'm on CKAN '2.4' (i.e. fairly recent master).
>> Thanks for any help - this is driving me slightly crackers!
>> Matt
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