catalog query Language='all' returns no objects in some cases

[thet]

I have a site with very basic and custom multilingual support, using an Language index. Querying for Language='all' returns no elements from the catalog.
Can the language query be avoided?

[mauritsvanrees]

That check is there precisely because of multilingual sites: without it, only results from the current language would be returned, so the catalog would only partially get fixed. And in newer versions of ZCatalog you need at least one filter to search on, or you don't get any results.
But wait, we have unrestrictedSearchResults for that, right?
Well, I don't see the restriction in latest ZCatalog that would require at least one filter.

So now I am confused. Do you know for sure what to call to get all catalog brains for current versions of Plone (4.3 up)?

[mauritsvanrees]

I tried with master on Plone 5.2, Python 3. Installed plone.app.multilingual, created Dutch, English and German content. Result of catalogcleanup:

Handling catalog portal_catalog.
Brains in portal_catalog: 16
Brains in portal_catalog using standard filter is different: 0
portal_catalog: removed 0 brains without UID.
portal_catalog: removed no brains in object check.
portal_catalog: 0 non unique uids found.
portal_catalog: 0 items need new unique uids.
portal_catalog: total problems: 1

Ignored non existing catalog uid_catalog.

Ignored non existing catalog reference_catalog.

Done with catalog cleanup.
Dry run selected: aborted any transaction changes.

So one problem, which is the one that you report:

Brains in portal_catalog: 16
Brains in portal_catalog using standard filter is different: 0

First I thought unrestrictedSearchResults would help, but that gives the same problem. But recent versions of Products.ZCatalog have a getAllBrains method. I have a branch that tries to use this method and falls back to unrestrictedSearchResults.
There might be versions where getAllBrains does not exist and where unrestrictedSearchResults does not return anything, but that seems a small range of versions.

[thet]

I think this can be closed.