Getting all CHildren Acs_as_tree

Rails
1

Hello, i want t know where can i foundd how to get all the childs from a
user id, including all, recursivily.

Regards,

2

recursive methods to collet a tree; very slow, and source-eating

given you have a Page acts_as_tree model.

i’d check out acts_as_nested_set if queries / speed is an issue, but

this works, # either way.

call get_tree to , um, get the tree

 def get_children(page, collection)
            page.children.each { |p|
            collection << p ; get_children(p, collection)
            }
    end

    def get_tree
            tree = []
            page = Page.find(params[:id])
            get_children(page, tree)
            render_text tree.collect{|p| p.id }.join(", ")
                    rescue
                    render_text "enter an id"
    end

then call get_tree/10 and it will find the branch under page#10.
hope this helps somewhat, but i would strongly reccomend looking up
other things aside from this recursive func, as it is a very slow
method, and if you have a lot of children, this could take ages.

either way, enjoy.
shai

3 
 def get_children(page, collection)
            page.children.each { |p|
            collection << p ; get_children(p, collection)
            }
    end

    def get_tree
            tree = []
            page = Page.find(params[:id])
            get_children(page, tree)
            render_text tree.collect{|p| p.id }.join(", ")
                    rescue
                    render_text "enter an id"
    end

how i have to call the method, because it throw a nil object, calling
this way:
<[email protected] do |m|%>
<%m.hijos.each do |c|%>
<%=c%>
<%end%>
<%end%>

because i have acts_as_tree in other model this is why
@member.matix…, so in member i got has_many :matrix

4

I found this, i think it will be helpful, the problem is if i specify,
for example 4, to see the members in the level 4, it will bring all the
members to level 4, but i just want the ones who ares in level 4, from
determinate user
def matrix(depth, list=[])
unless depth.zero?
children.each do |child|
list.push(child.member.name)
child.hijoss(depth-1, list)
end
end
list
end

i have tried:

def matrix2(depth)
list = matrix(depth)-matrix(depth-1)
end
but i dont like that way, i think there could be a better solution like
.include?, exclude, i dont know relly :P, please some help

regrads,

5

PLeased some help:

i want to load an hash array like this, but i dont get it:

def All(depth, list=[])
level=0
unless depth.zero?
level += 1
list[level] = []
children.each do |child|
list[level].push(child.member)
child.All(depth-1, list)
end
end
list
end

any ideas?

6

seems like i found with this :S
def matrix(depth)
list = matrixx(depth-1)
list.flatten - matrixx(depth-2).flatten
end