# IsFieldEmpty Criterion

The [`IsFieldEmpty` Search Criterion](https://doc.ibexa.co/en/latest/api/php_api/php_api_reference/classes/Ibexa-Contracts-Core-Repository-Values-Content-Query-Criterion-IsFieldEmpty.html) searches for content based on whether a specified field is empty or not.

## Arguments

- `fieldDefinitionIdentifier` - string representing the identifier of the field
- (optional) `value` - bool representing whether to search for empty (default `true`), or non-empty fields (`false`)

## Limitations

The `IsFieldEmpty` Criterion isn't available in [Repository filtering](https://doc.ibexa.co/en/latest/search/search_api/#repository-filtering).

The Richtext field type (`ibexa_richtext`) isn't searchable in the Legacy search engine.

The `IsFieldEmpty` criterion doesn't work for [Taxonomy entry assignment](https://doc.ibexa.co/en/latest/content_management/field_types/field_type_reference/taxonomyentryassignmentfield/index.md) fields. For this use case, use [`TaxonomyNoEntries`](https://doc.ibexa.co/en/latest/search/criteria_reference/taxonomy_no_entries/index.md) instead.

## Example

### PHP

```
$query->query = new Criterion\IsFieldEmpty('title');
```

## Use case

You can use the `IsFieldEmpty` Criterion to search for articles that don't have an image:

```
$query = new LocationQuery;
$query->query = new Criterion\LogicalAnd([
        new Criterion\ContentTypeIdentifier('article'),
        new Criterion\IsFieldEmpty('image'),
    ]
);
```