default value does not work

{
  "title": "Person",
  "type": "object",
  "properties": {
    "Do you have any pets?": {
      "type": "string",
      "enum": [
        "No",
        "Yes: One",
        "Yes: More than one"
      ],
      "default": "No"
    }
  },
  "required": [
    "Do you have any pets?"
  ],
  "dependencies": {
    "Do you have any pets?": {
      "oneOf": [
        {
          "properties": {
            "Do you have any pets?": {
              "enum": [
                "No"
              ]
            }
          }
        },
        {
          "properties": {
            "Do you have any pets?": {
              "enum": [
                "Yes: One"
              ]
            },
            "How old is your pet?": {
              "type": "number"
            }
          },
          "required": [
            "How old is your pet?"
          ]
        },
        {
          "properties": {
            "Do you have any pets?": {
              "enum": [
                "Yes: More than one"
              ]
            },
            "Do you want to get rid of any?": {
              "type": "boolean",
              **"default": false;**
            }
          },
          "required": [
            "Do you want to get rid of any?"
          ]
        }
      ]
    }
  }
}

as shown in the code, the default value for “Do you want to get rid of any?” does not work!

[cmawhorter]

my guess is that OP is running into the same problem i am. if the initial formData contains any value other than undefined for a property (like null), default will be ignored.

that’s correct, but unexpected, especially when dealing with non-required fields.

IMO – null for non-required fields should be stripped and not fail validation, since there is no way for an end-user to enter a value of null.

json schema supports multiple types e.g. something: { type: [ 'string', 'null' ] }. if this lib supported that, this would be a non-issue.

but as it stands right now, you need to preprocess data and strip all null values before handing it off to jsonschema-form or else it’ll force your user to interact with a non-required field.

An example for https://mozilla-services.github.io/react-jsonschema-form/

{
  "type": "object",
  "properties": {
    "notrequired": {
      "type": "string",
      "title": "Not required",
      "minLength": 0,
      "default": "fdsa"
    }
  }
}

formData

{
  "notrequired": null
}

With that, there is no way to submit the form.

This uischema doesn’t help matters either: { "notrequired": { "ui:emptyValue": "" } }

[MatinF]

@epicfaace I’ve now added this as a new issue with an example as requested: https://github.com/mozilla-services/react-jsonschema-form/issues/1293