No problem. Happy to help.

On the documentation front, yes, I think everyone knows this is a
little weak at the moment. There is always my first port of call:
api.cakephp.org.

Also, a number of people, myself included, are currently working hard
to try and produce a definitive manual for cake 1.2. Checkout cakephp-
docs google group.

simon

On Nov 9, 10:40 pm, Steveston <[EMAIL PROTECTED]> wrote:
> Thanks.
>
> Tree structure is not a problem for me. I am familiar with typical
> data structures like tree and typical algorithms like tree traversal,
> though not a veteran programmer.
>
> I am just a little bit surprised that such an important topic is not
> well covered in manual. I have to search Internet to find help. I
> usually do not compare different frameworks. But cake's documentation
> is way weaker than codeigniter.
>
> On Nov 9, 2:23 pm, "[EMAIL PROTECTED]"
>
> <[EMAIL PROTECTED]> wrote:
> > If you're not comfortable with mptt, just use the functions described
> > inhttp://manual.cakephp.org/chapter/aclformanaging the tree. See
> > especially the section called "Creating Access Request Objects (AROs)
> > and Access Control Objects (ACOs)"
>
> > If you want to know all about left and right...  (lft, rght) there's a
> > huge amount of this on google.
>
> > Also, checkout another great article from a cake 
> > perspective:http://www.ad7six.com/MiBlog/Blogs/view/Trees
>
> > Essentially, the left and right values are what defines the tree and
> > the parent / child relationships.
>
> > simon
>
> > On Nov 9, 10:02 pm, Steveston <[EMAIL PROTECTED]> wrote:
>
> > > No standard web pages containing all your search terms were found.
>
> > > Your search - lft right acl site:http://manual.cakephp.org-didnot
> > > match any documents.
>
> > > Suggestions:
>
> > >     * Make sure all words are spelled correctly.
> > >     * Try different keywords.
> > >     * Try more general keywords.
> > >     * Try fewer keywords.
>
> > > :)
>
> > > On Nov 9, 1:51 pm, "[EMAIL PROTECTED]"
>
> > > <[EMAIL PROTECTED]> wrote:
> > > > The Acl manual explains it all. You should never really need to be
> > > > editing these values directly, just use the console and/or Acl
> > > > component, which will take care of all the Tree values for you.
>
> > > > Alternatively, learn how MPTT works, and spend a lot of time doing it
> > > > all yourself.
>
> > > > On Nov 9, 8:18 pm, Steveston <[EMAIL PROTECTED]> wrote:
>
> > > > > If lft & right values are required, I am very surprised to see that
> > > > > there is no any explanation on manual about it.
>
> > > > > On Nov 9, 11:07 am, "[EMAIL PROTECTED]"
>
> > > > > <[EMAIL PROTECTED]> wrote:
> > > > > > Very much not.
>
> > > > > > The lft and rght values are an inherent part of the tree structure
> > > > > > (it's a Modified Pre-Order Traversal Tree if you're interested).
> > > > > > Without them, there is no tree structure.
>
> > > > > > The Acl system can be used to repair a damaged tree based on the
> > > > > > parent_id fields, but without the full left and right stuff, it just
> > > > > > won't be able to do aco or aro lookups, which is pretty fundamental.
>
> > > > > > I would recommend using the Acl behavior, which implies the Tree
> > > > > > behavior too, as a means of editing these values and having the MPTT
> > > > > > stuff handled for you.
>
> > > > > > For a clearer explanation see google on MPTT (or the forthcoming 
> > > > > > cake
> > > > > > 1.2 manual... when I get round to it - sorry John!)
>
> > > > > > Simon
>
> > > > > > On Nov 9, 6:42 pm, Steveston <[EMAIL PROTECTED]> wrote:
>
> > > > > > > Default values for lft & right codes in aco & aro are NULL.
>
> > > > > > > If I do not provide lft & right value (just use default NULL), 
> > > > > > > will
> > > > > > > ACL still work correctly?


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