On 13 Jun 2015 at 11:51:25, Thomas Mortagne
([email protected](mailto:[email protected])) wrote:
> On Sat, Jun 13, 2015 at 10:53 AM, [email protected] wrote:
> > Hi Devs,
> >
> > At
> > http://design.xwiki.org/xwiki/bin/view/Proposal/NestedSpaces#HDatabaseModel
> > I have started drafting some naive impl for Nested Spaces. I believe Edy
> > has provided some other links with probably more elaborate algorithms that
> > we should study (such as
> > http://www.slideshare.net/billkarwin/models-for-hierarchical-data).
> >
> > In any case I’ve also started a Problem section at
> > http://design.xwiki.org/xwiki/bin/view/Proposal/NestedSpaces#HProblems
> > where I’ve listed one item FTM. I’m pasting it here:
> >
> > “
> > * For ex if you do HQL (or you use an extension that does) like
> > {{code}}where doc.space = 'somespace'{{/code}} and add a parent or child
> > Space for ##somespace## then the query will not return anything anymore
> > since you can have something like ##parent.somespace.child## in the DB in
> > the ##space## column (since we store the full space reference in there for
> > NS).
> > ** Solution 1: Rewrite the queries to use something like {{code}}where
> > doc.space = 'somespace' or doc.space like '%.somespace'{{/code}}.
> > ** Solution 2: Don't modify the ##space## column and add a
> > ##spaceReference## one. This is not perfect in case there are several
> > spaces named ##somespace##
> > ** Solution 3: ??
> > “
>
> This use case does not really make much sense, you want to get the
> documents located in a specific space but I don't see why anyone would
> want to get all the documents located in a space anywhere that happen
> to have a reference ending with "somespace”.
Indeed, after more thinking and trying to find real use cases, I couldn’t find
any valid one. Thus this issue is more suite for the migration guide and I’ve
put it there at
http://design.xwiki.org/xwiki/bin/view/Proposal/NestedSpaces#HMigrationGuide
Thanks
-Vincent
> > I’d be curious to know what you think about it and if you have ideas.
> >
> > Feel free to list other problems you can see there and your ideas for
> > solving them.
> >
> > Thanks
> > -Vincent
> >
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