Hi, Martin, I notice that `child_key` issue isn't resolved yet.
I think the following statement is not necessary when using dm-is-
tree:
property :parent_id, Integer
because ideally dm-is-tree generates it by default. and if we want
change to another child_key, we can do this:
is :tree, :child_key => 'other_column_name'
by far, in dm-is-tree implementation, `is_tree` method evaluates the
following code:
belongs_to ...
has n, ...
but it does NOT evaluate:
property options[:child_key], Integer
so, we can't write code like this:
SomeModel.all(:parent_id => 345)
instead, we should do this:
SomeModel.all(:parent => SomeModel.get(345))
That's a little annoying, and this issue affects `roots` and
`first_root`:
def roots
options = { tree_options[:child_key] => nil }
options = { :order => Array(tree_options[:order]) }.merge
(options) if tree_options[:order]
all options
end
def first_root
options = { tree_options[:child_key] => nil }
options = { :order => Array(tree_options[:order]) }.merge
(options) if tree_options[:order]
first options
end
Two approch:
1. evaluate in is_tree:
property options[:child_key], Integer, :required => false
or 2. change roots and first_root criteria to:
options = { tree_options[:parent] => nil }
I can't tell which is the best.
Thanks for your work, Martin.
On Jan 25, 4:24 am, sliu <liusong1...@gmail.com> wrote:
> Thanks and Cheers!
>
> On Jan 21, 1:32 pm, Martin Gamsjaeger <gamsnj...@gmail.com> wrote:
>
> > Hey,
>
> > I just pushed a fix for this to dm-is-tree. Thx for finding this and
> > sharing!
>
> >http://github.com/datamapper/dm-more/commit/db424c34cc20349c640e2f3d9...
>
> > cheers
> > snusnu
>
> > On Thu, Jan 21, 2010 at 12:57, sliu <liusong1...@gmail.com> wrote:
> > > Because I didn't declare :parent_id property(is :tree genereates it
> > > implicitily), so
>
> > >http://github.com/drove/dm-more/blob/master/dm-is-tree/lib/dm-is-tree...
>
> > > Line 95:
> > > options = { tree_options[:child_key] => nil }
>
> > > should be changed to:
>
> > > options = { :parent => nil }
>
> > > On Jan 21, 11:48 am, sliu <liusong1...@gmail.com> wrote:
> > >> My previous post can resolve the "NOT NULL restriction issue" using an
> > >> explict :required => false option, but bring another issue.
> > >> Since :required option is only accepted by belongs_to, not has n.
> > >> So the two line I mentioned above should be modified
> > >> as:http://github.com/drove/dm-more/blob/master/dm-is-tree/lib/dm-is-tree...
> > >> (L74-L75)
>
> > >> assc_options = { :model => options[:model], :child_key => Array
> > >> (options[:child_key])}
> > >> has_n_options = options[:order] ? { :order => Array(options
> > >> [:order]) }.merge(assc_options) : assc_options.dup
> > >> assc_options.update(:required => false)
>
> > >> belongs_to :parent, assc_options
> > >> has n, :children, has_n_options
>
> > >> note: assign assc_options.dup to has_n_options, and update :required
> > >> => false option in the last line.
>
> > >> On Jan 15, 5:25 am, sliu <liusong1...@gmail.com> wrote:
>
> > >> > Save a root in dm-is-tree yield an validation error:
>
> > >> > @errors={:parent_id=>["Parent must not be blank"]}
>
> > >> > that's because root(s) node parent_id is NULL, but dm-is-tree calls
> > >> > "belongs_to :parent" doesn't carry :required => false option.
>
> > >> >http://github.com/drove/dm-more/blob/master/dm-is-tree/lib/dm-is-tree...
>
> > >> > assc_options = { :model => options[:model], :child_key => Array(options
> > >> > [:child_key]) }
> > >> > should be:
> > >> > assc_options = { :model => options[:model], :child_key => Array(options
> > >> > [:child_key]) , :required => false}
>
> > > --
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