valueAs
inline fun <T> valueAs(name: String = "$", serializer: JsonSerializer? = null): T
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Returns a field value from a result with exactly one row. Useful for getting the result of an aggregating function.
Samples
import com.couchbase.client.kotlin.Cluster
import com.couchbase.client.kotlin.query.QueryMetadata
import com.couchbase.client.kotlin.query.QueryResult
import com.couchbase.client.kotlin.query.execute
fun main() {
//sampleStart
// Single-value query with anonymous result
val count = cluster
.query("select count(*) from `travel-sample`")
.execute()
.valueAs<Long>() // uses default name "$1"
//sampleEnd
}import com.couchbase.client.kotlin.Cluster
import com.couchbase.client.kotlin.query.QueryMetadata
import com.couchbase.client.kotlin.query.QueryResult
import com.couchbase.client.kotlin.query.execute
fun main() {
//sampleStart
// Single-value query with named result
val count = cluster
.query("select count(*) as count from `travel-sample`")
.execute()
.valueAs<Long>("count")
//sampleEnd
}Parameters
name
the name of the field to extract.
serializer
for converting the field value to the requested type. Defaults to the QueryRow's serializer.
T
the serializer reads the field value as this type.
Throws
if there is more than one result row
if there is no field with the given name