ElasticGraph Query API: Equality Filtering

The most commonly used predicate supports equality filtering:

equalToAnyOf

Matches records where the field value is equal to any of the provided values. This works just like an IN operator in SQL.

Will be ignored when null is passed. When an empty list is passed, will cause this part of the filter to match no documents. When null is passed in the list, will match records where the field value is null.

Here’s a basic example:

query EqualityFilter {
  artists(filter: {
    name: {equalToAnyOf: ["U2", "Radiohead"]}
  }) {
    nodes {
      name
      bio {
        yearFormed
      }
    }
  }
}

Unlike the SQL IN operator, you can find records with null values if you put null in the list:

query EqualityFilterNull {
  artists(filter: {
    name: {equalToAnyOf: [null]}
  }) {
    nodes {
      name
      bio {
        yearFormed
      }
    }
  }
}