solr-scala-client is a simple Apache Solr client for Scala based on SolrJ.
The list of new features in 0.0.7:
- Add build for Scala 2.10
- Upgrade to SolrJ 4.2.0
- Support search result highlighting
In this entry, I introduce search result highlighting which is a new feature in this release.
How to Highlight?
You can configure the query to return the highlighted content using QueryBuilder#highlight(). The highlighted field is required, but prefix and suffix is not required. They are optional(default is <em>...</em>).
The highlighted content is set as the "highlight" property to the Map or the case class.
val result = client.query("content: Scala")
// NOTE: unique key field is required.
.fields("id")
// Specify the highlighted field, prefix and postfix (prefix and postfix is optional).
.highlight("content", "", "")
.getResultAsMap()
result.documents.foreach { doc: Product =>
println("id: " + doc("id"))
println(doc("highlight")) // highlighted content is set as the "highlight" property
}
In SolrJ, we have to map retrieved documents and highlighted contents using the unique key of the index schema. solr-scala-client expects that the unique key is "id".
If your schema has the different field as the unique key, you can specify the unique key name as following:
val result = client.query("content: Scala")
.id("documentId") // Specify the unique key name
.fields("documentId")
.highlight("content", "", "")
.getResultAsMap()
