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GEPS 010: Relational Backend

No change in size, 09:23, 26 March 2009
New db backend for GRAMPS
# write an implementation of [ src/gen/db/] to interface the DB abstraction layer with the rest of gramps. Gramps 3.x only has one implementation: [ src/gen/db/], but in branch22 a gedcom and a gramps xml implementation can be found (these have been deprecated).
# once written, this can be added as an experimental backend to GRAMPS
:## Family Tree manager needs to list the family tree type (bsddb, sqlite), on creation of new family tree user must choose the backend.:## User can import .gramps/gedcom files just as this is done with bsddb backend once family tree is set up.
# it will be very important to use slots in src/gen/lib to make this work. Obtaining a person via get_person_from_handle, should only hit the person table. Only when the calling method needs attributes, should the attribute table be hit. This requires attributes that are not yet defined up to the moment they are accessed. It also means that the gen/lib objects for sql need to be aware of the database as it needs to know where to obtain these values... . This looks like a huge work to me, but definitely doable. Just rewriting gen/lib for an sql datamodel might be easier though, but that means rewriting the core of GRAMPS....

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