Search for records where a field does not exist
How to create a list of records that does not have a given field
Table of Contents
How to:
Sierra Create Lists is able to search for a field that does not exist, however this search is not included in the user interface. You can only include it in your search with JSON. Here’s the JSON search to look for a bib record without an 020 field:
{
"target": {
"record": {
"type": "bib"
},
"field": {
"marcTag": "245",
"subfields": "a"
}
},
"expr": {
"op": "not_exists",
"operands": [
"",
""
]
}
}You can use that alone or add it to a search with other criteria.
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