Add support for JSON Schema library

[yogeshvachhani]

I have been using this in another platform and from my experience can say that it is a very powerful library with easy to setup and use features.

https://json-schema.org/

It allow one to build interactive forms and also validate them.

The forms are constructed in a fashion Frappe developers are familiar with.

Here is a sample...

{
  "title": "User Information",
  "description": "Form Example",
  "type": "object",
  "required": [
    "name",
    "phone"
  ],
  "properties": {
    "name": {
      "type": "string",
      "title": "Name"
    },
    "phone": {
      "type": "string",
      "title": "Phone",
      "minLength": 11
    },
    "birthday": {
      "type": "string",
      "title": "Birthday"
    }
  }
}

Here is how the form is rendered on screen

If you observed the JSON code you will find it similar to what we use for building modals/forms in Frappe!

Please let me know you inputs on this idea.

[batonac]

This looks like it highlights a few possible improvements to the doctype spec, which could then be further integrated into builder native forms.

[yogeshvachhani]

Do think it is possible to integrate this library?

[batonac]

I don't know that it's possible to integrate it, as such, since there's a non-complementary overlap of functionality. The Frappe Framework uses JSON to define data fields and their properties, but uses an alternative set of keys and structure. That's not because it uses an alternative to JSON Schema, it is an alternative to JSON Schema. Study the DocField JSON Schema to see what I mean. That said, JSON Schema has a few clear advantages at this point, like tight-interoperability with HTML fields, regular expression for pattern enforcement, a few extra parameters like minLength. I'd love to see these incorporated into the Framework, as well as a more general-purpose adaptation of Frappe fieldtypes to HTML field types.

The last point is probably the most significant as far as Builder is concerned, since builder doesn't incorporate the "classic" framework libraries into the frontend. What's needed is a conversion library to express DocFields as HTML fields, which would be doable these days for most of them (you couldn't do so much with native HTML fields when Frappe was developed).