null array problem in json

Question

I have written a function which scans all the files/directory in a given directory and returns a json object. I need to display this json object on the UI using jstree. I have written the function in go using recursion to scan all the files and directories rooted at that particular folder.

This is the type I am using to construct the whole structure

type Directory struct {
    Name string "data"
    SubDirs []Directory "children"
}

Now jstree accepts data structs of the following format.

json_data: {
        data: [
            "f1",
            "f2",
            {
                data: "f3",
                children: ["f4", "f5"]
            }
        ]
 }

and not of the format :-

json_data: {
        data: [
            {
              "data": "f1",
              "children": []
            } 
            {
              "data": "f2",
              "children": []
            } 
            {
                data: "f3",
                children: ["f4", "f5"]
            }
        ]
 }

(when I pass the above data structure format, it doesn't work probably since the "children" thing is null)

Thus the data structure Directory I have maintained doesn't suffice to construct the directory structure.

How do I solve this problem of constructing the Directory tree homogeneously?

Mike Kwan · Accepted Answer · 2011-07-07 14:49:21Z

1

The final one is not even valid JSON. The spec defines that empty arrays are valid and allowed. Try:

{
    "data": [
        {
            "data": "f1",
            "children": []
        },
        {
            "data": "f2",
            "children": []
        },
        {
            "data": "f3",
            "children": [
                "f4",
                "f5"
            ]
        }
    ]
}

Use JSONLint to validate your JSON objects.

answered Jul 7, 2011 at 14:49

Mike Kwan

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2 Comments

chinmay Over a year ago

I guess the main problem is of jstree, how do I solve in jstree's perspective because it says that it accepts json objects but isn't accepting the above which is a valid json object

newacct Over a year ago

@chinmay: I also think that it makes sense to be able to represent empty directories as a directory with no children, different from a file. and if jstree doesn't support that, then it seems like an issue with jstree

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