how to apply patterns on array enums in JSON schema

Question

I have a simple JSON schema that looks like so (and works)

{
    "cols": {
        "type": "array",
        "items": {
            "type": "string",
            "enum": [
                "id",
                "name",
                "age",
                "affiliation",
                ""
            ]
        },
        "additionalProperties": false
    }
}

I would like the enum to be the values prescribed above + a decoration so that any of the following would be allowed

"enum" = [
    "id",
    "lower(name)",
    "average(age)",
    "distinct(affiliation)",
    ""
]

In other words, for cols

cols=id would be valid but no further decoration would be allowed around id
cols=name and cols=lower(name) would be valid
cols=age and cols=average(age) would be valid
cols=affiliation and cols=distinct(affiliation) would be valid
cols='' empty string would be valid

Specifying the decorations as patterns would be great so that they would be case-insensitive. For example, cols=lower(name) and cols=LOWER(name) would both be ok.

double-beep · Accepted Answer · 2023-03-27 15:21:07Z

2

You can change your enumerated list in enum to a list of patterns:

"items": [
  "type": "string",
  "anyOf": [
    { "pattern": "^cols\b...the rest of your pattern here...$" },
    { etc... }
  ]
]

edited Mar 27, 2023 at 15:21

double-beep

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answered Feb 25, 2022 at 18:01

Ether

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