Empty fields

Description

This validator removes fields that have no values:

• Data-fields: subfields.length === 0
• Data-field subfields: $.fields[*].subfields[?(value.length === 0)]
  • Only empty subfields are removed. Whole field is removed only if all of it's subfields have zero-length values

This is validator serves no purpose if @natlibfi/marc-record is run on default (strict) validation settings.

Record examples

Valid

{
  "fields": [
    {
      "tag": "001",
      "value": "1234567"
    },
    {
      "tag": "008",
      "value": "98867273672367213"
    },
    {
      "tag": "245",
      "subfields": [
        {
          "code": "a",
          "value": "foo"
        },
        {
          "code": "b",
          "value": "bar"
        }
      ]
    },
    {
      "tag": "500",
      "subfields": [
        {
          "code": "a",
          "value": "foobar"
        }
      ]
    }
  ]
}

Invalid

{
  "fields": [
    {
      "tag": "001",
      "value": "1234567"
    },
    {
      "tag": "008",
      "value": ""
    },
    {
      "tag": "245",
      "subfields": [
        {
          "code": "a",
          "value": "foo"
        },
        {
          "code": "b",
          "value": ""
        }
      ]
    },
    {
      "tag": "500",
      "subfields": []
    }
  ]
}