Is it possible to allow date strings to have a value of empty string ("") ?

[SamSedivy]

Is it possible to allow date strings to have a value of empty string ("") ?

[SamSedivy]

Is it possible to remove the validation for fields with format = "date" ?

[schmunk42]

Sounds tricky...

What's possible is to define string,null for the property, but this does not exactly do what you want.

{
  "title": "json schema example",
  "type": "object",
  "properties": {
    "example": {
      "type": [
        "string",
        "null"
      ],
      "format": "date",
      "description": "This is an example schema.",
      "default": ""
    }
  }
}

Or you could use show_opt_in, but that removes the property completely if not set.

@SamSedivy Do you validate the data on the server also? Is an empty string valid?

@germanbisurgi any ideas? Is it possible to override the validation?

[germanbisurgi]

The problem is that json-editor shouldn't use format keyword for validation per default. More on that here.
A couple of solutions that came in mind:

With pattern

{
  "type": "string",
  "description": "Format 'YYYY-MM-DD', or empty.",
  "pattern": "^(|\\d{4}-\\d{2}-\\d{2})$"
}

with oneOf

{
  "type": "string",
  "description": "Format 'YYYY-MM-DD', or empty.",
  "oneOf": [
    {
      "title": "Date Format",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
    },
    {
      "title": "Empty String",
      "pattern": "^$"
    }
  ]
}

[matthiask]

This has bitten me as well.

Previously, this schema has worked fine:

    schema={
        "type": "object",
        "properties": {
            "title": {"type": "string"},
            "issues": {
                "type": "array",
                "format": "table",
                "minItems": 1,
                "items": {
                    "type": "object",
                    "properties": {
                        "number": {
                            "type": "string",
                        },
                        "published_on": {
                            "type": "string",
                            "format": "date",
                        },
                    },
                },
            },
        },
    }

Now it already fails when initializing the editor for a new object. Changing minItems to zero allows the initialization to proceed. The oneOf thing isn't an option really since an empty string isn't valid but there's no way to even enter any data. The exact error is t.errmsg is undefined in the addInputError handler, but I'm not sure if that helps.

EDIT: The big problem is that the initialization fails and the je-not-loaded isn't removed; pointer-events:none makes it impossible to select the fields to start adding valid data.