i have moved the metadata autoload&diff into own place under dbcook/misc/metadata/:
http://dbcook.svn.sourceforge.net/viewvc/dbcook/trunk/dbcook/misc/ svn co https://dbcook.svn.sourceforge.net/svnroot/dbcook/trunk/dbcook/misc/ IMO, wiki's are ok for readymade/works-for-me things and explanations, but any live/maintanable code should stay in a repository. i'm planning to use that misc/ directory as repository for all sorts of recipes about dbcook/SA usage for various application field things. For now only the metadata/ is there - and once embedded into SA, it may disappear; from other things below, the bitemporal/ stuff is 100% ready but have to separate it - Ants, we could exchange some ideas about it later; multilang/ and nested_user_trans/ are invented but not written/ready, cache_results/ is sort of invented but far from ready (and may need triggers / in-SQL-funcs which aren't supported by SA yet). The rest is just eventualities. here the dbcook/misc/metadata/readme.txt: ------------------------------------------- metadata/: (SA-only) metadata autoload and diff bitemporal/: (SA ~only) addon for objects that have 2-time-history + state(enabled/disabled) needs following properties per object: obj_id = ObjId() #incremented by special ObjectCounter time_valid = Date() time_trans = Date() disabled = Bool( default_value= False) multilang/: (dbcook/SA) addon for transparent multi-language textual properties, allowing for history nested_user_transactions/: (dbcook/SA) addon to support nested user transactions aspect (NOT nested DB transactions). needs following properties per object: transact = TransactID( default_value= 0) cache_results/: (dbcook/SA) addon for automaticaly-updated database-denormalisation caches of intermediate results, each one depending on particular pattern of usage. Wishful usage syntax (ALL else automatic): class Cache4averagePerson( Base): fieldname = cache_aggregator( klas.field, AggrFilterCriteria) #e.g. #age = cache_agregators.Average( Person.age, FilterCriteria1) #salary = cache_agregators.Sum( Person.salary, FilterCriteria2) may be invented or may not: Numerator - something that gives numbers/ids to objects in whatever special way. Think of invoices, incoming/outgoing/reference documents, inventories etc. multivalue - a value that is represented/representable in many currencies/ways/measurements. Think of money, items that can be measured either as volume or as weight (e.g. gas), etc. ========================================================= ciao svil --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
