Help, new to Alpaca

[dzg]

I have all my data in an object (see below.) I want 3 dropdown fields, and each dropdown should populate with options based on the selection of the previous one.

For example:

data = {
  "campaign1": {
    "name": "Campaign 1",
    "projects": {
      "job A": [
        "proj 1"
      ],
      "job B": [
        "proj 2",
        "proj 3"
      ]
    }
  },
  "campaign2": {
    "name": "Campaign 2",
    "projects": {
      "job C": [
        "proj 4",
        "proj 5",
        "proj 6"
      ],
      "job D": [
        "proj 7",
        "proj 8",
        "proj 9"
      ]
    }
  }
}

The idea is that first you choose a "Campaign", then the 2nd dropdown shows the "Jobs" for that campaign, then the 3rd shows the "Projects" for that job.

What kind of fields/relationships do I need here? Do I need to write a function for the 2nd and 3rd fields? How do I 'get' the choice from another field before submission?

I looked at the optiontree field type but that doesn't seem to do what I want (in that I'm not assigning 'attributes' to a 'value') although the rendered version behaves the way I want.

I would like to use my data object as is, although I can re-structure it if necessary.

Basically I want something like the driver choose on nvidia ... https://www.nvidia.com/download/index.aspx First pick a type, then a series based on the type, etc...

Thanks!

[seseso]

You should have a look at dependencies / conditional dependencies on the documentation pages: http://alpacajs.org/docs/api/dependencies.html http://alpacajs.org/docs/api/conditional-dependencies.html