#isMissing

Returns true if the provided path does not exist in the source document, false otherwise.

#isMissing(path)

Category Paths and existenceValid in Property value

Parameters

Name	Type	Description
path	path	A JSON Path into the source document.

Returns

boolean

Notes

• A property that exists with a null value is not missing; use #isNull for that.

Examples

Missing versus present

source.json

{
    "present": null
}

transformer.json

{
    "present": "#isMissing($.present)",
    "absent": "#isMissing($.absent)"
}

output.json

{
    "present": false,
    "absent": true
}

Try it in the playground →

Related

#exists · #isNull