Gaetan de Menten schrieb: > On Thu, Oct 22, 2009 at 19:48, Diez B. Roggisch <[email protected]> wrote: > > >> a couple of month ago I asked how to create circular dependencies within >> Elixir. Eventually, I dropped the issue, as I just created a normal >> int-column and some @property-magic around it. >> >> Now it became apparent that this produces *horrible* SQL-query-numbers, as >> SA/Elixir isn't aware of the relationship. >> >> We found that by temporarily declaring the relationship the other way round, >> and it massively improved the performance. >> >> So I created a minimal example that shows the problems we run into - and it >> would be *fabulous* if one could advise us on how to solve that. >> > > You should use post_update=True on the ManyToOne relationship. See: > http://www.sqlalchemy.org/docs/05/mappers.html#rows-that-point-to-themselves-mutually-dependent-rows > > Elixir has build in versioning system. http://elixir.ematia.de/apidocs/elixir.ext.versioned.html Here are some nice slides containing also some examples on other extensions in elixir. http://cleverdevil.org/elixirtalk/slides.pdf
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