Required properties is not working with checkboxes of multiple check

[hank619]

Prerequisites

• I have searched the existing issues
• I understand that providing a SSCCE example is tremendously useful to the maintainers.
• I have read the documentation
• Ideally, I'm providing a sample JSFiddle, Codesandbox.io or preferably a shared playground link demonstrating the issue.

What theme are you using?

core

Version

6.0.0-beta.7

Current Behavior

When click submit, if user has not check any choise, can show error message for user

Expected Behavior

When click submit, no error message is shown

Steps To Reproduce

JSON schema

{
  "type": "object",
  "properties": {
    "hobby": {
      "type": "array",
      "title": "A multiple choices list",
      "items": {
        "type": "string",
        "enum": [
          "foo",
          "bar",
          "fuzz",
          "qux"
        ]
      },
      "uniqueItems": true
    }
  },
  "required": [
    "hobby"
  ]
}

UI schema:

"hobby": {
    "ui:widget": "checkboxes"
  }

Environment

- OS:
- Node:
- npm:

Anything else?

No response

[nickgros]

@hank619

In your case, the form data is an empty array, which is valid against the schema you described, so that's why you don't see an error. It is not a bug.

If you want at least one item to be checked, you can add "minItems": 1, see this schema (playground link):

{
  "type": "object",
  "properties": {
    "hobby": {
      "type": "array",
      "title": "A multiple choices list",
      "items": {
        "type": "string",
        "enum": [
          "foo",
          "bar",
          "fuzz",
          "qux"
        ]
      },
      "uniqueItems": true,
      "minItems": 1
    }
  },
  "required": [
    "hobby"
  ]
}

[hank619]

thx for you explaination, work now.