Public bug reported:
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)
** Affects: libzeitgeist
Importance: Undecided
Status: New
** Affects: zeitgeist
Importance: Undecided
Status: New
** Also affects: zeitgeist
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/884193
Title:
Add a way to query only a specific class - and NOT sub classes
Status in Zeitgeist Client Library:
New
Status in Zeitgeist Framework:
New
Bug description:
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)
To manage notifications about this bug go to:
https://bugs.launchpad.net/libzeitgeist/+bug/884193/+subscriptions
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