Add a way to query only a specific class - and NOT sub classes

[Mikkel Kamstrup Erlandsen]

The problem is that nfo:FileDataObject (which we use as manifestation for all files) has subclasses nfo:RemoteDataObject and nfo:EmbeddedFileDataObject which we may not be interested in querying for (at least, we're not in Unity). In Unity we qualify our queries by restricting them to also have subject prefix "file:*".

Not only does this feel slightly hackish, but it is also slower since the indexes are used less effectively. I propose adding a new modifier "+" to the manifestation and interpretation (for both event and subject) that signifies that the field must be matched exactly, without subtype expansion.

ie:

  Event.new_for_values (manifestation=FILE_DATA_OBJECT)

matches also remote- and embedded objects, while prepending a "+" forces the matching to be strict:

  Event.new_for_values (manifestation="+"+FILE_DATA_OBJECT)

[Siegfried Gevatter (rainct)]

Branch waiting for review.

https://code.launchpad.net/~zeitgeist/zeitgeist/884193/+merge/84412

[Siegfried Gevatter (rainct)]

This doesn't need any changes in libzeitgeist, does it?

[Mikkel Kamstrup Erlandsen (kamstrup)]

On 2 February 2012 12:49, Siegfried Gevatter <email address hidden> wrote:
> This doesn't need any changes in libzeitgeist, does it?

Not that I am aware of. It'll just be callers changing the strings
they pass for event/subject attributes. So no API changes.

[Siegfried Gevatter (rainct)]

I'm closing the libzeitgeist task then.