I'm trying to use jqTree with json data need [ not {

[burtondav]

jqTree requires the json data to start with [ not {

I can do that with jbuilder when building an array! - but, is there a way to modify this code:

json.locations do json.lavel @location.name end

[rwz]

What json do you want to get?

[burtondav]

I'm trying to get json for an ancestry gem table. The table contains a tree of location data. Because it's a tree, I only need to start with the first record - then I access their children. This is the code I'm trying:

json.locations do
  json.label @location.name
  json.children @location.children do |child|
    json.label child.name
    json.children child.children do |child2|
        json.label child2.name
        json.children child2.children do |child3|
               json.label child3.name
          end
   end
  end
end

The results start with a { and jqTree requires that it start with a [

This is what I'm getting:

BTW - If I use the following, the output starts with [

But, this produces the wrong data.

json.array!(@locations) do |location|
  json.label location.name
  json.children location.children do |child|
    json.label child.name
    json.children child.children do |child2|
        json.label child2.name
            json.children child2.children do |child3|
               json.label child3.name
       end
   end
  end

end

[jdeff]

First, I might want to use a partial for this instead of having a child2, child3, etc. Unless you only always have three levels. Maybe something like

_your_partial.json.jbuilder:

json.label location.name
json.children do
    json.array! location.children do |child|
        json.partial! 'your_partial', :location => child
    end
end

In order to get an array at the top level, in your controller, put @location inside of an array (i.e. @locations = [@location]). Then your view would look like:

json.locations do
    json.array! @locations do |location|
        json.partial! 'your_partial', :location => location
    end
end

[burtondav]

My controller was like this (I only need the first location to start the tree):

    def tree
     @location = Location.find(1)
    end

I tried this - but, got errors.

def tree
  @location = [Location.find(1)]
end

[burtondav]

I tried this:

json.locations do
 json.label @location.name
 json.children @location.children do |child|
 ...

But, it still starts with { instead of [

[rwz]

You should use array! to get an array.

[jdeff]

You could do:

json.array! [1] do json.location do ... end end

Sent from my iPhone

On Feb 27, 2013, at 12:17 PM, David Burton notifications@github.com wrote:

I tried this:

json.locations do json.label @location.name json.children @location.children do |child| ... But, it still starts with { instead of [

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