D3中“父/子”层次结构中的多级映射可能吗？

Question

I've a flat file which is of format

"id":1,"depends_on":2
"id":1,"depends_on":4
"id":1,"depends_on":5
"id":2,"depends_on":3
"id":4,"depends_on":5

Normally if I don't have

"id":1,"depends_on":5

I can plot the D3 Layout as follows

When I include "id":1,"depends_on":5

Graph that's being plot will be

Ideally I should have a line between 1 & 5 too, along with other mappings.

1) How can I achieve this?

2) How should the data-structure should be? Does it really need to have duplicate entries (objects) in various parts of main data-structure ( to obtain in the format D3 needed (parent,children[])

Using d3.layout.force produces

Answer 1

Check out this example , which uses d3.layout.force() .

A force layout's data structure involves 2 arrays:

an array of nodes

[{id: 1}, {id: 2}, {id: 3}, {id: 4}]`

and array of links

[
  { source: {id: 1}, target: {id: 2} },
  { source: {id: 1}, target: {id: 3} }, 
  { source: {id: 2}, target: {id: 4} }
]

The objects used in the nodes array and links array should be the same objects. Ie, in the example above, nodes[0] == links.source[0] should be true.