Limiting Drop-Down Values for Conditionally Constrained Schema

[chapmanjw]

Prerequisites

• I have read the documentation;
• In the case of a bug report, I understand that providing a SSCCE example is tremendously useful to the maintainers.
• Ideally, I'm providing a sample JSFiddle or a shared playground link demonstrating the issue.

Description

For schema elements with enumerations that get conditionally constrained, the form library validates correctly, but still displays the enumeration values that are no longer valid.

I would expect that if an enumeration has 3 valid values, but is conditionally constrained to 2 of those, that only the 2 remaining valid values would be displayed.

Steps to Reproduce

Example Schema:

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "propertyA"
  ],
  "properties": {
    "propertyA": {
      "title": "Property A",
      "required": [
        "value"
      ],
      "properties": {
        "value": {
          "title": "Enum Value",
          "enum": [
            "value1",
            "value2",
            "value3"
          ],
          "enumNames": [
            "Value 1",
            "Value 2",
            "Value 3"
          ],
          "type": "string"
        },
        "secondValue": {
          "title": "Second Enum Value",
          "enum": [
            "value4",
            "value5",
            "value6"
          ],
          "enumNames": [
            "Value 4",
            "Value 5",
            "Value 6"
          ],
          "type": "string"
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "value": {
                "enum": [
                  "value1",
                  "value2"
                ]
              }
            }
          },
          "then": {
            "properties": {
              "secondValue": {
                "enum": [
                  "value4",
                  "value5"
                ]
              }
            }
          },
          "else": {
            "properties": {
              "secondValue": {
                "enum": [
                  "value6"
                ]
              }
            }
          }
        }
      ]
    }
  }
}

Expected behavior

When selecting "Value 1" for "Enum Value", I would expect "Second Enum Value" to only display "Value 4" and "Value 5" as valid options rather than all of the original enum values.

Validation shows an error correctly when "Value 6" is selected, but I would expect preventing the user from selecting "Value 6" in the first place.

Actual behavior

"Value 6" is still displayed.

Version

Playground: https://rjsf-team.github.io/react-jsonschema-form/

[epicfaace]

Your schema uses if/then/else which is not supported (#850). Perhaps you could achieve your objective by using dependencies and oneOf.

[chapmanjw]

@epicfaace Other methods, such as anyOf or oneOf, create multiple schemas rather that limiting a single schema. This results in the second down-down-list to pick which schema to match to (like the example on this issue: #1586).

This provides a less-than-ideal user experience. Ideally, we'd have a way to limit values displayed in a single drop-down rather than multiple schemas.